{"id":2460,"date":"2023-04-11T09:05:26","date_gmt":"2023-04-11T02:05:26","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=2460"},"modified":"2023-11-24T15:02:46","modified_gmt":"2023-11-24T08:02:46","slug":"vietnam-journal-of-forest-science-number-1-2023","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2023\/04\/vietnam-journal-of-forest-science-number-1-2023\/","title":{"rendered":"Vietnam Journal of Forest Science Number 1-2023"},"content":{"rendered":"

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<\/a><\/a><\/a>T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 <\/strong>1<\/strong> – <\/strong>20<\/strong>2<\/strong>3<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng gia \u0111\u00ecnh c\u00e2y tr\u1ed9i Th\u00f4ng carib\u00ea (Pinus caribaea<\/em> Morelet)
\nt\u1eeb h\u1ea1t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4<\/td>\n		In vitro<\/em> propagation of Pinus caribaea<\/em> Morelet from seeds of plus tree family<\/td>\nL\u01b0u Th\u1ecb Qu\u1ef3nh
\nV\u0103n Thu Huy\u1ec1n
\nNguy\u1ec5n Anh D\u0169ng
\nHo\u00e0ng Th\u1ecb H\u1ed3ng H\u1ea1nh
\nL\u00ea Th\u1ecb Hoa
\nNguy\u1ec5n Th\u1ecb Hi\u00ean
\n\u0110\u1ed7 H\u1eefu S\u01a1n
\nC\u1ea5n Th\u1ecb Lan
\nMai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay<\/td>\n		5<\/td>\n<\/tr>\n
2.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng
\nc\u00e1c d\u00f2ng Tr\u00e0m n\u0103m g\u00e2n Q15.38, Q15.013, Q16.427 (Melaleuca quinquenervia<\/em> (Cav.) S.T.Blake) b\u1eb1ng k\u1ef9 thu\u1eadt nu\u00f4i c\u1ea5y in vitro<\/em><\/td>\n		Research on propagation Q15.38, Q15.013, Q16.427 clones of Melaleuca quinquenervia<\/em> by technique in vitro<\/em><\/td>\nKhu\u1ea5t Th\u1ecb H\u1ea3i Ninh
\nHo\u00e0ng Th\u1ecb Thu
\nNguy\u1ec5n Th\u1ecb Th\u01a1
\n\u0110\u00e0o Th\u1ecb Thanh Mai
\nV\u0169 Quang Nam
\nNguy\u1ec5n Th\u1ecb Thanh H\u01b0\u1eddng
\nL\u00ea \u0110inh Kh\u1ea3
\nHo\u00e0ng Thanh L\u1ed9c<\/td>\n		13<\/td>\n<\/tr>\n
3.<\/td>\nNghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng
\nc\u00e2y B\u00ecnh v\u00f4i nh\u1ecb ng\u1eafn
\nt\u1ea1i t\u1ec9nh Th\u00e1i Nguy\u00ean<\/td>\n		Propagation of Stephania brachyandra<\/em> in Thai Nguyen province, Vietnam<\/td>\nD\u01b0\u01a1ng V\u0103n Th\u1ea3o<\/td>\n25<\/td>\n<\/tr>\n
4.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng v\u00e0 tu\u1ed5i c\u00e2y m\u1eb9 \u0111\u1ebfn kh\u1ea3 n\u0103ng ra r\u1ec5 c\u1ee7a hom Sao \u0111en (Hopea odorata<\/em> Roxb.)<\/td>\nEffects of age and growth stimulators on rooting of Hopea odorata<\/em> Roxb. cuttings<\/td>\nNguy\u1ec5n Th\u1ecb H\u1ea3i H\u1ed3ng
\nTr\u1ea7n Th\u1ecb M\u1ef9 Duy\u00ean
\nB\u00f9i Th\u1ecb Gia H\u00e2n
\n\u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i<\/td>\n		32<\/td>\n<\/tr>\n
5.<\/td>\n\u1ea2nh h\u01b0\u1edfng c\u1ee7a chi\u1ec1u cao g\u1ed1c c\u1eaft v\u00e0 ph\u01b0\u01a1ng th\u1ee9c
\n\u0111\u1ec3 l\u1ea1i g\u1ed1c c\u1eaft \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a c\u00e0nh gh\u00e9p c\u00e1c gi\u1ed1ng s\u1edf t\u1ea1i Ngh\u1ec7 An
\nv\u00e0 Qu\u1ea3ng Ninh<\/td>\n		Effects of cutting height and methods of mother trees on growth of scions of Camellia varieties in Nghe An and Quang Ninh province<\/td>\nHo\u00e0ng V\u0103n Th\u00e0nh
\nTr\u1ea7n H\u1ed3ng V\u00e2n
\nH\u00e0 Th\u1ecb Mai
\nHo\u00e0ng V\u0103n Th\u1eafng
\nCao V\u0103n L\u1ea1ng
\nPh\u1ea1m \u0110\u00ecnh S\u00e2m
\nHo\u00e0ng Th\u1ecb Nhung
\nNguy\u1ec5n H\u1eefu Th\u1ecbnh
\nH\u1ed3 Trung L\u01b0\u01a1ng
\nNguy\u1ec5n Thanh S\u01a1n<\/td>\n		38<\/td>\n<\/tr>\n
6.<\/td>\nM\u00f4 h\u00ecnh h\u00f3a ph\u00e2n b\u1ed1 t\u1ea7n s\u1ed1 c\u1ee7a c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng cho r\u1eebng tr\u1ed3ng
\nSa m\u1ed9c<\/td>\n		Tree-size variable frequency distribution modelling for Cunminghamia lanceolata<\/em> plantation<\/td>\nB\u00f9i M\u1ea1nh H\u01b0ng<\/td>\n46<\/td>\n<\/tr>\n
7.<\/td>\nB\u01b0\u1edbc \u0111\u1ea7u nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ebf ph\u1ea9m n\u1ea5m r\u1ec5 n\u1ed9i c\u1ed9ng sinh AM \u0111\u1ebfn t\u1ef7 l\u1ec7 s\u1ed1ng v\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a keo lai v\u00e0 Keo l\u00e1 tr\u00e0m tr\u1ed3ng tr\u00ean \u0111\u1ea5t b\u00e3i th\u1ea3i khai th\u00e1c than \u0110\u00f4ng Cao S\u01a1n \u1edf Qu\u1ea3ng Ninh<\/td>\nPreliminary research on the effects of AM (Arbuscular Mycorrhizal) on survival rate and growth of Acacia hybrid and Acacia auriculiformis<\/em> planted at Dong Cao S\u01a1n coal mining waste land in Quang Ninh province<\/td>\nV\u0169 Qu\u00fd \u0110\u00f4ng
\nL\u00ea V\u0103n Th\u00e0nh
\nL\u00ea Th\u1ecb Thu H\u1eb1ng
\nPh\u1ea1m Ng\u1ecdc Th\u00e0nh
\nH\u00e0 \u0110\u00ecnh Long
\n\u0110\u1ed7 M\u1ea1nh D\u0169ng
\nNguy\u1ec5n Ho\u00e0ng Hu\u00e2n
\nPh\u1ea1m Tu\u1ea5n Anh
\nGi\u00e1p V\u0103n Ki\u00ean<\/td>\n		58<\/td>\n<\/tr>\n
8.<\/td>\nH\u00e0nh vi l\u1ef1a ch\u1ecdn c\u00e2y ch\u1ee7 c\u1ee7a lo\u00e0i m\u1ecdt mang n\u1ea5m Platypus quercivorus<\/em> Murayama (Coleoptera: Playpodidae) th\u00f4ng qua
\nc\u00e1c h\u1ee3p ch\u1ea5t ho\u00e1 h\u1ecdc d\u1ec5 bay h\u01a1i t\u1eeb th\u1ef1c v\u1eadt<\/td>\n		Host recognization of the ambrosia beetle Platypus quercivorus<\/em> Murayama (Coleoptera: Playpodidae) based on volatile substances<\/td>\nPh\u1ea1m Duy Long
\n\u0110\u00e0o Ng\u1ecdc Quang<\/td>\n		66<\/td>\n<\/tr>\n
9.<\/td>\n\u0110\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i, v\u1eadt h\u1eadu v\u00e0 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i c\u1ee7a m\u1ed9t s\u1ed1 gia \u0111\u00ecnh L\u00e1t hoa ch\u1ed1ng ch\u1ecbu s\u00e2u \u0111\u1ee5c n\u00f5n (Hypsipyla robusta<\/em>)<\/td>\nMorphology, phenology and recovery capacities of some Chukrasia tabularis<\/em> families tolerant to shoot borer
\n(Hypsipyla robusta<\/em>)<\/td>\n		Tr\u1ea7n Th\u1ecb L\u1ec7 Tr\u00e0
\nPh\u1ea1m Quang Thu
\nNguy\u1ec5n Minh Ch\u00ed<\/td>\n		79<\/td>\n<\/tr>\n
10.<\/td>\nM\u00f4 h\u00ecnh m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh s\u1ea5y quy chu\u1ea9n g\u1ed7
\nKeo tai t\u01b0\u1ee3ng (Acacia mangium<\/em> Willd.)<\/td>\n		The conventional drying model applied to Acacia mangium<\/em> Willd. timber<\/td>\nH\u00e0 Ti\u1ebfn M\u1ea1nh
\nPh\u1ea1m V\u0103n Ch\u01b0\u01a1ng
\nB\u00f9i Duy Ng\u1ecdc
\nTr\u1ea7n \u0110\u0103ng S\u00e1ng<\/td>\n		89<\/td>\n<\/tr>\n
11.<\/td>\nC\u00f4ng ngh\u1ec7 t\u1ea1o keo Melamine Urea Formaldehyde (MUF) cho s\u1ea3n xu\u1ea5t v\u00e1n d\u00e1n th\u00e2n thi\u1ec7n m\u00f4i tr\u01b0\u1eddng \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n xu\u1ea5t kh\u1ea9u (CARB – P2\/E0 \/F***\/F****)<\/td>\nSynthesis technology of melamine urea formaldehyde adhesive (MUF) for eco – friendly plywood production meetting export requirement (CARB\/E0\/F****)<\/td>\nNguy\u1ec5n H\u1ed3ng Minh
\nT\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/td>\n		100<\/td>\n<\/tr>\n
12.<\/td>\n\u0110\u00e1nh gi\u00e1 th\u1ef1c tr\u1ea1ng thu nh\u1eadp c\u1ee7a c\u00e1c h\u1ed9 gia \u0111\u00ecnh tham gia s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p t\u1ea1i c\u00e1c t\u1ec9nh Trung du mi\u1ec1n n\u00fai ph\u00eda B\u1eafc<\/td>\nAssessment the income of households which participanting in forestry production in the Northern Mountainous provinces<\/td>\n\u0110\u1eb7ng Quang H\u01b0ng
\nNguy\u1ec5n Xu\u00e2n \u0110\u00e0i
\n\u0110\u1ed7 Th\u1ecb Kim Nhung<\/td>\n		109<\/td>\n<\/tr>\n
13.<\/td>\nKh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng hi\u1ec7p \u0111\u1ecbnh th\u01b0\u01a1ng m\u1ea1i t\u1ef1 do
\nli\u00ean minh ch\u00e2u \u00c2u – Vi\u1ec7t Nam v\u1ec1 lao \u0111\u1ed9ng c\u1ee7a
\ndoanh nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7 nh\u1ecf v\u00e0 v\u1eeba<\/td>\n		Ability to meet the EU-Vietnam Free Trade Agreement on labor of small and medium-sized wood processing enterprises<\/td>\nNguy\u1ec5n Ti\u1ebfn H\u1ea3i
\nHo\u00e0ng Li\u00ean S\u01a1n
\nNguy\u1ec5n Th\u1ecb Thu H\u00e0<\/td>\n		122<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG GIA \u0110\u00ccNH C\u00c2Y TR\u1ed8I\u00a0TH\u00d4NG CARIB\u00ca (Pinus caribaea<\/em> Morelet) T\u1eea H\u1ea0T\u00a0B\u1eb0NG PH\u01af\u01a0NG PH\u00c1P NU\u00d4I C\u1ea4Y M\u00d4<\/p>\n

<\/a>L\u01b0u Th\u1ecb Qu\u1ef3nh, V\u0103n Thu Huy\u1ec1n, Nguy\u1ec5n Anh D\u0169ng, Ho\u00e0ng Th\u1ecb H\u1ed3ng H\u1ea1nh, L\u00ea Th\u1ecb Hoa, Nguy\u1ec5n Th\u1ecb Hi\u00ean, \u0110\u1ed7 H\u1eefu S\u01a1n, C\u1ea5n Th\u1ecb Lan, Mai Th\u1ecb Ph\u01b0\u01a1ng Th\u00fay<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Gi\u1ed1ng v\u00e0 C\u00f4ng ngh\u1ec7 sinh h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Th\u00f4ng carib\u00ea c\u00f3 ti\u1ec1m n\u0103ng cho tr\u1ed3ng r\u1eebng \u1edf n\u01b0\u1edbc ta do kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng nhanh h\u01a1n c\u00e1c lo\u00e0i th\u00f4ng kh\u00e1c, t\u00ednh ch\u1ea5t g\u1ed7 kh\u00e1 t\u1ed1t, th\u00edch nghi tr\u00ean nhi\u1ec1u d\u1ea1ng l\u1eadp \u0111\u1ecba kh\u00e1c nhau, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu gi\u00f3 b\u00e3o t\u1ed1t. Tuy nhi\u00ean, v\u1ea5n \u0111\u1ec1 nh\u00e2n gi\u1ed1ng b\u1eb1ng h\u1ea1t hay hom ch\u01b0a \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c nhu c\u1ea7u tr\u1ed3ng r\u1eebng. V\u00ec v\u1eady, \u0111\u1ed1i v\u1edbi Th\u00f4ng carib\u00ea nh\u00e2n gi\u1ed1ng in vitro<\/em> cho c\u00e1c l\u00f4 h\u1ea1t c\u00e2y tr\u1ed9i l\u00e0 h\u00ecnh th\u1ee9c c\u00f3 hi\u1ec7u qu\u1ea3 \u0111\u1ec3 ph\u00e1t tri\u1ec3n c\u00e1c gi\u1ed1ng c\u00f3 n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n v\u00e0o s\u1ea3n xu\u1ea5t. Trong nghi\u00ean c\u1ee9u n\u00e0y, ch\u00fang t\u00f4i ti\u1ebfn h\u00e0nh nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng in vitro<\/em> cho Th\u00f4ng carib\u00ea s\u1eed d\u1ee5ng ngu\u1ed3n v\u1eadt li\u1ec7u ban \u0111\u1ea7u l\u00e0 h\u1ea1t thu t\u1eeb c\u00e1c c\u00e2y tr\u1ed9i \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ecdn l\u1ecdc. H\u1ea1t Th\u00f4ng carib\u00ea \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh n\u1ea3y m\u1ea7m tr\u00ean b\u00f4ng g\u00f2n. \u0110o\u1ea1n th\u00e2n m\u1ea7m t\u1eeb c\u00e2y m\u1ea7m 40 ng\u00e0y tu\u1ed5i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m m\u1eabu v\u1eadt cho qu\u00e1 tr\u00ecnh kh\u1eed tr\u00f9ng. K\u1ebft qu\u1ea3 kh\u1eed tr\u00f9ng t\u1ed1t nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng clorua th\u1ee7y ng\u00e2n HgCl2<\/sub> 0,1% trong th\u1eddi gian 12 ph\u00fat. M\u00f4i tr\u01b0\u1eddng nh\u00e2n ch\u1ed3i t\u1ed1i \u01b0u l\u00e0 MS* <\/sup>+ 0,25mg\/l BAP + 4,25g\/l agar + 30g\/l \u0111\u01b0\u1eddng. Chu k\u1ef3 nh\u00e2n ch\u1ed3i t\u1eeb 40 – 45 ng\u00e0y, sau th\u1eddi gian tr\u00ean c\u1ee5m ch\u1ed3i c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng ch\u1ed3i v\u00e0 h\u1ea1n ch\u1ebf t\u0103ng tr\u01b0\u1edfng chi\u1ec1u cao. M\u00f4i tr\u01b0\u1eddng th\u00edch h\u1ee3p nh\u1ea5t \u0111\u1ec3 t\u1ea1o r\u1ec5 in vitro<\/em> l\u00e0 1\/2 MS* <\/sup>+ 1mg\/l IBA + 4,5g\/l agar + 30g\/l \u0111\u01b0\u1eddng. Ch\u1ed3i in vitro<\/em> b\u1eaft \u0111\u1ea7u ra r\u1ec5 sau 4 tu\u1ea7n v\u00e0 ra r\u1ec5 ho\u00e0n ch\u1ec9nh sau 6 tu\u1ea7n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Th\u00f4ng carib\u00ea, nh\u00e2n gi\u1ed1ng in vitro<\/em>, c\u00e2y tr\u1ed9i, nh\u00e2n gi\u1ed1ng hom, c\u00e2y m\u1ea7m<\/td>\n<\/tr>\n

\n

<\/a>In vitro<\/em> propagation of Pinus caribaea<\/em> Morelet from seeds of plus tree family<\/strong><\/p>\n

\u00a0Pinus caribaea<\/em> Morelet has potential for afforestation in Vietnam because of its fast growing ability, good wood properties, adaptation to different site conditions, and good resistance to wind and storm. However, the propagation by seeds or cuttings has not met the needs of afforestation. Therefore, in vitro<\/em> propagation of P. caribaea<\/em> from dominant seed plots is an effective way to develop varieties with improved yield and quality into production. In this study, we carried out an in vitro<\/em> propagation for P. caribaea<\/em> using seeds obtained from selected plus trees. P. caribaea<\/em> seeds were germinated on cotton wool. The stem segments taken from the 40 – day-old seedlings were used in the sterilization process. The best sterilization result was using 0.1% HgCl2<\/sub> for 12 minutes. The optimal shoot multiplication medium was MS* + 0.25mg\/l BAP + 4.25g\/l agar + 30g\/l sugar. The cycle of shoot multiplication was from 40 – 45 days, after that, there was a decrease in the number of shoots and a restriction in height growth in bud clusters. The most suitable medium for in vitro<\/em> rooting was 1\/2 MS* + 1mg\/l IBA + 4.5g\/l agar + 30g\/l sugar. In vitro<\/em> shoots began to root after 4 weeks and completed rooting after 6 weeks.<\/p>\n

Keywords:<\/em><\/strong> Pinus caribaea<\/em> Morelet, in vitro<\/em> propagation, plus tree, cuttings, seedlings<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG C\u00c1C D\u00d2NG TR\u00c0M N\u0102M G\u00c2N Q15.38, Q15.013, Q16.427 (Melaleuca quinquenervia <\/em>(Cav.) S.T.Blake)\u00a0B\u1eb0NG K\u1ef8 THU\u1eacT NU\u00d4I C\u1ea4Y IN VITRO<\/em><\/p>\n

<\/a>Khu\u1ea5t Th\u1ecb H\u1ea3i Ninh1<\/sup>, Ho\u00e0ng Th\u1ecb Thu1<\/sup>, Nguy\u1ec5n Th\u1ecb Th\u01a11<\/sup>, \u0110\u00e0o Th\u1ecb Thanh Mai1<\/sup>
\nV\u0169 Quang Nam1<\/sup>, Nguy\u1ec5n Th\u1ecb Thanh H\u01b0\u1eddng2<\/sup>, L\u00ea \u0110inh Kh\u1ea32<\/sup>, Ho\u00e0ng Thanh L\u1ed9c2<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p, 2<\/sup>Vi\u1ec7n C\u1ea3i thi\u1ec7n gi\u1ed1ng v\u00e0 Ph\u00e1t tri\u1ec3n l\u00e2m s\u1ea3n<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e1c d\u00f2ng v\u00f4 t\u00ednh Tr\u00e0m n\u0103m g\u00e2n g\u1ed3m Q15.38, Q15.013, Q16.427 c\u00f3 h\u00e0m l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng tinh d\u1ea7u cao, \u0111\u00e3 \u0111\u01b0\u1ee3c B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 Ph\u00e1t tri\u1ec3n n\u00f4ng th\u00f4n c\u00f4ng nh\u1eadn l\u00e0 gi\u1ed1ng ti\u1ebfn b\u1ed9 k\u1ef9 thu\u1eadt. Do \u0111\u00f3, x\u00e1c \u0111\u1ecbnh v\u00e0 t\u1ed1i \u01b0u h\u00f3a ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng in vitro <\/em>cho c\u00e1c d\u00f2ng v\u00f4 t\u00ednh tr\u00ean l\u00e0 c\u1ea7n thi\u1ebft v\u00e0 c\u00f3 \u00fd ngh\u0129a th\u1ef1c ti\u1ec5n trong vi\u1ec7c t\u0103ng t\u00ednh \u0111a d\u1ea1ng sinh h\u1ecdc, \u0111\u1ed9 an to\u00e0n trong tr\u1ed3ng r\u1eebng c\u00f4ng nghi\u1ec7p, c\u0169ng nh\u01b0 \u0111\u1ec3 \u0111\u01b0a nhanh c\u00e1c gi\u1ed1ng t\u1ed1t v\u00e0o s\u1ea3n xu\u1ea5t cung c\u1ea5p v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e2y gi\u1ed1ng \u1ed5n \u0111\u1ecbnh cho ng\u01b0\u1eddi tr\u1ed3ng r\u1eebng. K\u1ebft qu\u1ea3 nh\u00e2n gi\u1ed1ng in vtro<\/em> c\u00e1c d\u00f2ng Tr\u00e0m n\u0103m g\u00e2n tr\u00ean cho th\u1ea5y t\u1ea1o m\u1eabu s\u1ea1ch th\u00f4ng qua kh\u1eed tr\u00f9ng m\u1eabu ch\u1ed3i b\u1eb1ng Javen 5% trong th\u1eddi gian 10 ph\u00fat v\u1edbi t\u1ef7 l\u1ec7 m\u1eabu s\u1ea1ch n\u1ea3y ch\u1ed3i \u0111\u1ea1t 44,44 – 64,4%. M\u00f4i tr\u01b0\u1eddng t\u1ea1o c\u1ee5m ch\u1ed3i MS* + 0,7 mg\/l BAP + 0,2 mg\/l Kinetin + 0,1 mg\/l NAA (v\u1edbi 100% m\u1eabu t\u1ea1o c\u1ee5m ch\u1ed3i; 3,5 – 6,7 ch\u1ed3i\/c\u1ee5m). K\u00edch th\u00edch t\u0103ng tr\u01b0\u1edfng ch\u1ed3i tr\u00ean m\u00f4i tr\u01b0\u1eddng c\u00f3 s\u1eed d\u1ee5ng 0,3 – 0,4 mg\/l Kinetin + 0,7 mg\/l BAP + 0,1 mg\/l NAA (v\u1edbi t\u1ef7 l\u1ec7 ch\u1ed3i h\u1eefu hi\u1ec7u \u0111\u1ea1t tr\u00ean 84,44%, h\u1ec7 s\u1ed1 nh\u00e2n ch\u1ed3i \u0111\u1ea1t tr\u00ean 3,7 l\u1ea7n, chi\u1ec1u cao ch\u1ed3i tr\u00ean 2,73 cm) sau 3 tu\u1ea7n nu\u00f4i c\u1ea5y. C\u00e1c b\u00ecnh ch\u1ed3i trong giai \u0111o\u1ea1n nh\u00e2n nhanh \u0111\u01b0\u1ee3c \u0111\u1eb7t d\u01b0\u1edbi c\u01b0\u1eddng \u0111\u1ed9 chi\u1ebfu s\u00e1ng 1.000 lux trong 1 chu k\u1ef3 nu\u00f4i l\u00e0 ph\u00f9 h\u1ee3p nh\u1ea5t. M\u00f4i tr\u01b0\u1eddng ra r\u1ec5 in vitro<\/em> c\u00e1c d\u00f2ng Tr\u00e0m n\u0103m g\u00e2n l\u00e0 MS* + 1,5 mg\/l NAA (100% ch\u1ed3i ra r\u1ec5; 2,4 – 3,8 r\u1ec5\/ch\u1ed3i, chi\u1ec1u d\u00e0i r\u1ec5 1,7 – 2,2 cm sau 3 tu\u1ea7n nu\u00f4i c\u1ea5y). Gi\u00e1 th\u1ec3 30% tr\u1ea5u hun v\u00e0 70% \u0111\u1ea5t t\u1ea7ng B th\u00edch h\u1ee3p \u0111\u1ec3 ra ng\u00f4i c\u00e1c d\u00f2ng v\u00f4 t\u00ednh Tr\u00e0m n\u0103m g\u00e2n v\u1edbi t\u1ef7 l\u1ec7 c\u00e2y s\u1ed1ng \u0111\u1ea1t tr\u00ean 95%, chi\u1ec1u cao c\u00e2y \u0111\u1ea1t 21,67 – 25,49 cm, c\u00e2y c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t sau 3 th\u00e1ng tr\u1ed3ng \u1edf v\u01b0\u1eddn \u01b0\u01a1m.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> D\u00f2ng v\u00f4 t\u00ednh, in vitro<\/em>, Tr\u00e0m n\u0103m g\u00e2n, tinh d\u1ea7u<\/td>\n<\/tr>\n

\n

<\/a>Research on propagation Q15.38, Q15.013, Q16.427 clones of Melaleuca quinquenervia <\/em>by technique in vitro<\/em><\/strong><\/p>\n

Q15.38, Q15.013, Q16.427 clones of Melaleuca quinquenervia <\/em>(Cav.) S.T. Blake have high content and quality of essential oils, recognized as technically advanced varieties by the Ministry of Agriculture and Rural Development. Therefore, identification and optimization of the in vitro<\/em> propagation method for the above clones by in vitro<\/em> culture method are necessary and have practical significance in increasing the biodiversity and safety in the industrial afforestation, as well as to quickly put good varieties into production and provide large quantities of stable seedlings to forest growers. The results of in vitro<\/em> propagation of these Melaleuca clone lines showed that cleaned samples by disinfecting with Javen 5% for 10 minutes are shooting with 44.44 – 64.4%. The medium to create shoot cluster is MS* + 0. 7 mg\/l BAP + 0.2 mg\/l Kinetin +0.1 mg\/l NAA, with 100% of created shoot cluster and 3.5 – 3.6 shoots per cluster. Stimulating shoot growth on medium of 0.3 – 0.4 mg\/l Kinetin + 0.7 mg\/l BAP + 0.1 mg\/l NAA is resulted with effective shoot rate of over 84.44%, coefficient shoot multiplication of over 3.7 times, shoot height of over 2.73 cm after 3 weeks of tissue culture. The shoot pots in the rapid multiplication period placed under 1,000 lux light intensity for 1 culture cycle are most suitable. The rooting medium of these Melaleuca clone lines is MS* + 1.5 mg\/l NAA (100% rooting shoots, 2.4 – 3.8 roots\/shoot, 1.7 – 2.2 cm root length after 3 culture weeks). The substrate of 30% hunk rice husk and 70% of soil from layer B is suitable for the crowning of these Melaleuca clones, with a survival rate of over 95%, the tree height of 21.67 – 25.49 cm, the plants with good quality after 3 months of planting in the nursery.<\/p>\n

Keywords:<\/em><\/strong> Clones, essential oil, in vitro, <\/em>Melaleuca quinquenervia<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>NGHI\u00caN C\u1ee8U NH\u00c2N GI\u1ed0NG C\u00c2Y B\u00ccNH V\u00d4I NH\u1eca NG\u1eaeN\u00a0T\u1ea0I T\u1ec8NH TH\u00c1I NGUY\u00caN<\/p>\n

<\/a>D\u01b0\u01a1ng V\u0103n Th\u1ea3o<\/p>\n

Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m, \u0110\u1ea1i h\u1ecdc Th\u00e1i Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00ecnh v\u00f4i nh\u1ecb ng\u1eafn (Stephania brachyandra<\/em> Diels) l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y thu\u1ed1c qu\u00fd, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn l\u00e0m nguy\u00ean li\u1ec7u d\u01b0\u1ee3c \u1edf Vi\u1ec7t Nam v\u00e0 c\u00e1c n\u01b0\u1edbc ch\u00e2u \u00c1. Tuy nhi\u00ean, lo\u00e0i c\u00e2y n\u00e0y \u0111\u00e3 b\u1ecb khai th\u00e1c t\u1eadn di\u1ec7t v\u00e0 c\u00f3 nguy c\u01a1 tuy\u1ec7t ch\u1ee7ng n\u00ean r\u1ea5t c\u1ea7n \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm n\u00e0y. Nghi\u00ean c\u1ee9u nh\u1eb1m x\u00e1c \u0111\u1ecbnh k\u1ef9 thu\u1eadt x\u1eed l\u00fd h\u1ea1t gi\u1ed1ng, gi\u00e1 th\u1ec3 gieo \u01b0\u01a1m v\u00e0 ch\u1ebf \u0111\u1ed9 che s\u00e1ng trong qu\u00e1 tr\u00ecnh gieo \u01b0\u01a1m c\u00e2y B\u00ecnh v\u00f4i. K\u1ebft qu\u1ea3 cho th\u1ea5y x\u1eed l\u00fd h\u1ea1t B\u00ecnh v\u00f4i nh\u1ecb ng\u1eafn b\u1eb1ng c\u00e1ch ng\u00e2m trong n\u01b0\u1edbc l\u00e3 (20o<\/sup>C) trong 6 gi\u1edd \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao nh\u1ea5t, t\u1ef7 l\u1ec7 n\u1ea3y m\u1ea7m \u0111\u1ea1t 85,6%. Gi\u00e1 th\u1ec3 gieo \u01b0\u01a1m g\u1ed3m 99% \u0111\u1ea5t + 1% NPK cho t\u1ef7 l\u1ec7 c\u00e2y s\u1ed1ng cao nh\u1ea5t (92,9%), kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c v\u00e0 chi\u1ec1u cao t\u1ed1t nh\u1ea5t, t\u01b0\u01a1ng \u1ee9ng \u0111\u1ea1t 1,47 mm v\u00e0 12,33 cm. Ch\u1ebf \u0111\u1ed9 che s\u00e1ng 50% \u0111\u00e3 gi\u00fap c\u00e2y sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t (Hvn<\/sub> = 12,19 cm) v\u00e0 t\u1ef7 l\u1ec7 c\u00e2y s\u1ed1ng cao nh\u1ea5t (90,3%). K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y s\u1ebd l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 x\u00e2y d\u1ef1ng h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng c\u00e2y B\u00ecnh v\u00f4i b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gieo h\u1ea1t ph\u1ee5c v\u1ee5 c\u00f4ng t\u00e1c b\u1ea3o t\u1ed3n v\u00e0 ph\u00e1t tri\u1ec3n ngu\u1ed3n gen lo\u00e0i c\u00e2y n\u00e0y.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> B\u00ecnh v\u00f4i nh\u1ecb ng\u1eafn, c\u00e2y gi\u1ed1ng, nh\u00e2n gi\u1ed1ng<\/td>\n<\/tr>\n

\n

<\/a>Propagation of Stephania brachyandra<\/em> in Thai Nguyen province, Vietnam<\/strong><\/p>\n

Stephania brachyandra<\/em> Diels is a valuable medicinal plant, popularly used as a medicinal material in Vietnam and Asian countries. However, overexpoitation are leading to the dramatical reduction of wild population of this species. Therefore, it is necessary to conduct a research on propagation of this rare medicinal plant. The research aimed to determine seed treatment techniques, seedling pot media and shading regimes in the process of sowing of this species. The results showed that the treatment of seeds by soaking in tap water (20o<\/sup>C) for 6 hours achieved the highest efficiency, the germination rate reached 85.6%. The seedling pot medium consisting of 99% soil + 1% NPK gave the highest survival rate (92.9%), the best growth rate of root diameter and height, respectively reaching 1.47 mm and 12.33 cm. The 50% shading mode helped the best growth (Hvn<\/sub> = 12.19 cm) and the highest survival rate (90.3%). The results of this study will be the basis for the development of technical guidelines for propagating the plant by sowing seeds to serve the conservation and development of genetic resources of this plant.<\/p>\n

Keywords:<\/em><\/strong> Propagation, seedling, Stephania brachyandra <\/em>Diels<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A CH\u1ea4T \u0110I\u1ec0U H\u00d2A SINH TR\u01af\u1edeNG V\u00c0 TU\u1ed4I C\u00c2Y M\u1eb8 \u0110\u1ebeN KH\u1ea2 N\u0102NG RA R\u1ec4 C\u1ee6A HOM SAO \u0110EN (Hopea odorata <\/em>Roxb.)<\/p>\n

<\/a>Nguy\u1ec5n Th\u1ecb H\u1ea3i H\u1ed3ng, Tr\u1ea7n Th\u1ecb M\u1ef9 Duy\u00ean, B\u00f9i Th\u1ecb Gia H\u00e2n, \u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i<\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Sao \u0111en (Hopea odorata<\/em> Roxb.) l\u00e0 lo\u00e0i c\u00e2y g\u1ed7 l\u1edbn th\u01b0\u1eddng xanh, c\u00f3 gi\u00e1 tr\u1ecb kinh t\u1ebf v\u00e0 sinh th\u00e1i, chi\u1ebfm \u01b0u th\u1ebf trong r\u1eebng m\u01b0a nhi\u1ec7t \u0111\u1edbi. \u0110\u00e2y l\u00e0 m\u1ed9t trong s\u1ed1 nh\u1eefng lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba tr\u1ed3ng r\u1eebng ph\u1ed1 bi\u1ebfn \u1edf n\u01b0\u1edbc ta. M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u nh\u1eb1m x\u00e1c \u0111\u1ecbnh \u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng v\u00e0 tu\u1ed5i c\u00e2y m\u1eb9 l\u1ea5y hom \u0111\u1ebfn kh\u1ea3 n\u0103ng ra r\u1ec5 c\u1ee7a hom Sao \u0111en. Hom Sao \u0111en \u0111\u01b0\u1ee3c thu h\u00e1i t\u1eeb r\u1eebng tr\u1ed3ng \u1edf th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh v\u00e0 \u0110\u1ed3ng Nai. Ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng IBA (1.000, 1.500ppm) v\u00e0 2,4D (50, 100, 500ppm); tu\u1ed5i c\u00e2y m\u1eb9 l\u1ea5y hom (1, 2, 5, 10, 15 n\u0103m tu\u1ed5i) \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u1ea3o s\u00e1t trong hai th\u00ed nghi\u1ec7m ri\u00eang bi\u1ec7t. K\u1ebft qu\u1ea3 cho th\u1ea5y ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng r\u1ec5 trong gi\u00e2m hom Sao \u0111en. Trong nghi\u00ean c\u1ee9u n\u00e0y, hom \u0111\u01b0\u1ee3c x\u1eed l\u00fd 2,4D n\u1ed3ng \u0111\u1ed9 100ppm nh\u00ecn chung cho t\u1ef7 l\u1ec7 ra r\u1ec5, s\u1ed1 r\u1ec5\/hom v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 \u0111\u1ea1t t\u1ed1t h\u01a1n. B\u00ean c\u1ea1nh \u0111\u00f3, kh\u1ea3 n\u0103ng ra r\u1ec5 c\u1ee7a hom Sao \u0111en gia t\u0103ng khi tu\u1ed5i c\u00e2y m\u1eb9 l\u1ea5y hom gi\u1ea3m. Hom l\u1ea5y t\u1eeb c\u00e2y m\u1eb9 1 n\u0103m tu\u1ed5i cho t\u1ef7 l\u1ec7 ra r\u1ec5 r\u1ea5t cao 94,7% v\u00e0 gi\u1ea3m xu\u1ed1ng ch\u1ec9 c\u00f2n 20,5% ra r\u1ec5 khi l\u1ea5y hom t\u1eeb c\u00e2y m\u1eb9 15 n\u0103m tu\u1ed5i, s\u1ed1 l\u01b0\u1ee3ng r\u1ec5 v\u00e0 chi\u1ec1u d\u00e0i r\u1ec5 c\u0169ng c\u00f3 c\u00f9ng khuynh h\u01b0\u1edbng t\u01b0\u01a1ng t\u1ef1.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Gi\u00e2m hom, tu\u1ed5i c\u00e2y m\u1eb9, ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng, Sao \u0111en (Hopea odorata<\/em>)<\/td>\n<\/tr>\n

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<\/a>Effects of age and growth stimulators on rooting of Hopea odorata <\/em>Roxb. cuttings<\/strong><\/p>\n

Hopea odorata<\/em> Roxb. is an evergreen species for large timber with high economic and ecological values, dominated in the tropical rain forests that predominates in tropical rainforests. This is one of the indigenous tree species planted popularly in Vietnam. The objective of the study was to determine the effects of growth regulators and ages of the mother plants on the rooting ability of cuttings. The cuttings were collected from plantations in Ho Chi Minh City and Dong Nai province. Growth regulators included IBA (1,000, 1,500ppm) and 2.4D (50, 100, 500ppm); the ages of the mother tree for cuttings (1, 2, 5, 10, 15 years old) were tested in two separate experiments. The results showed that plant growth stimulantors affected root quality in Hopea odorata<\/em> cuttings. In this study, cuttings treated with 2.4D at a concentration of 100ppm had generally better rooting percentage, number of roots per cutting and root length. Besides, the rooting ability of Hopea odorata<\/em> cuttings increased when the age of mother plant reduced. Cuttings collected from one-year-old mother trees had very high rooting percentage (94.7%) and those decreased only 20.5% when cuttings were collected from 15 – year-old mother trees, number of roots per cutting and root length also had the same trend.<\/p>\n

Keywords:<\/em><\/strong> Cuttings, age, growth stimulators, Hopea odorata<\/em> Roxb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u1ea2NH H\u01af\u1edeNG C\u1ee6A CHI\u1ec0U CAO G\u1ed0C C\u1eaeT V\u00c0\u00a0PH\u01af\u01a0NG TH\u1ee8C \u0110\u1ec2 L\u1ea0I G\u1ed0C C\u1eaeT \u0110\u1ebeN SINH TR\u01af\u1edeNG C\u1ee6A C\u00c0NH GH\u00c9P C\u00c1C GI\u1ed0NG S\u1ede T\u1ea0I NGH\u1ec6 AN V\u00c0 QU\u1ea2NG NINH<\/p>\n

<\/a>Ho\u00e0ng V\u0103n Th\u00e0nh1<\/sup>, Tr\u1ea7n H\u1ed3ng V\u00e2n1<\/sup>, H\u00e0 Th\u1ecb Mai1<\/sup>, Ho\u00e0ng V\u0103n Th\u1eafng2<\/sup>,
\nCao V\u0103n L\u1ea1ng2<\/sup>, Ph\u1ea1m \u0110\u00ecnh S\u00e2m1<\/sup>, Ho\u00e0ng Th\u1ecb Nhung1<\/sup>, Nguy\u1ec5n H\u1eefu Th\u1ecbnh1<\/sup>,
\nH\u1ed3 Trung L\u01b0\u01a1ng1<\/sup>, Nguy\u1ec5n Thanh S\u01a1n1<\/sup><\/p>\n

[1]Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\n2Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Hi\u1ec7n nay nhi\u1ec1u di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng s\u1edf l\u00e2u n\u0103m \u1edf c\u00e1c \u0111\u1ecba ph\u01b0\u01a1ng \u0111\u00e3 b\u1ecb tho\u00e1i h\u00f3a n\u00ean n\u0103ng su\u1ea5t, ch\u1ea5t l\u01b0\u1ee3ng qu\u1ea3, h\u1ea1t ng\u00e0y c\u00e0ng gi\u1ea3m, d\u1eabn \u0111\u1ebfn hi\u1ec7u qu\u1ea3 kinh t\u1ebf kh\u00f4ng cao. \u0110\u1ec3 n\u00e2ng cao n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u00e1c r\u1eebng tr\u1ed3ng s\u1edf n\u00e0y, vi\u1ec7c gh\u00e9p \u0111\u1ed5i t\u00e1n l\u00e0 gi\u1ea3i ph\u00e1p nhanh cho thu ho\u1ea1ch v\u1edbi n\u0103ng su\u1ea5t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng cao h\u01a1n. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt gh\u00e9p \u0111\u1ed5i t\u00e1n cho c\u00e1c gi\u1ed1ng s\u1edf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p c\u1eaft g\u1ed1c c\u00e2y m\u1eb9 \u1edf c\u00e1c \u0111\u1ed9 cao g\u1ed1c c\u1eaft kh\u00e1c nhau v\u00e0 ph\u01b0\u01a1ng th\u1ee9c c\u1eaft g\u1ed1c c\u00e2y m\u1eb9 kh\u00e1c nhau \u0111\u1ec3 t\u1ea1o ch\u1ed3i gh\u00e9p \u0111\u00e3 cho th\u1ea5y: c\u00e0nh gh\u00e9p trong c\u00e1c th\u00ed nghi\u1ec7m \u0111\u1ec1u sinh tr\u01b0\u1edfng ph\u00e1t tri\u1ec3n t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t v\u00e0 b\u01b0\u1edbc \u0111\u1ea7u cho th\u1ea5y r\u1ea5t c\u00f3 tri\u1ec3n v\u1ecdng trong vi\u1ec7c ph\u1ee5c tr\u00e1ng c\u00e1c r\u1eebng s\u1edf gi\u00e0 c\u1ed7i, \u0111\u00e3 b\u1ecb tho\u00e1i h\u00f3a. Sau 24 th\u00e1ng gh\u00e9p, c\u00e0nh gh\u00e9p c\u1ee7a c\u00e1c gi\u1ed1ng s\u1edf trong th\u00ed nghi\u1ec7m c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng trung b\u00ecnh dao \u0111\u1ed9ng t\u1eeb 81,19 – 90,63% v\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 sai kh\u00e1c gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m. C\u00e0nh gh\u00e9p c\u1ee7a c\u1ea3 hai gi\u1ed1ng s\u1edf trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m \u0111\u1ec1u cho sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t v\u00e0 \u0111\u00e3 c\u00f3 s\u1ef1 kh\u00e1c nhau gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m. V\u1edbi c\u1ea3 hai gi\u1ed1ng S\u1edf ch\u00e8 v\u00e0 S\u1edf l\u00ea th\u00ec c\u00f4ng th\u1ee9c \u0111\u1ec3 l\u1ea1i chi\u1ec1u cao g\u1ed1c c\u1eaft 1,5 m v\u00e0 c\u00f4ng th\u1ee9c c\u1eaft g\u1ed1c c\u00e2y m\u1eb9 theo \u0111\u00e1m cho sinh tr\u01b0\u1edfng c\u1ee7a c\u00e0nh gh\u00e9p \u0111\u1ea1t t\u1ed1t nh\u1ea5t. M\u1eb7c d\u00f9 th\u1eddi gian gh\u00e9p m\u1edbi \u0111\u01b0\u1ee3c 2 n\u0103m nh\u01b0ng m\u1ed9t s\u1ed1 c\u00e0nh gh\u00e9p trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m c\u1ee7a c\u1ea3 hai gi\u1ed1ng s\u1edf \u0111\u1ec1u \u0111\u00e3 ra hoa, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong th\u00ed nghi\u1ec7m v\u1ec1 chi\u1ec1u cao c\u1eaft g\u1ed1c c\u00e2y m\u1eb9. Gi\u1ed1ng S\u1edf ch\u00e8 cho t\u1ef7 l\u1ec7 s\u1ed1 c\u00e0nh gh\u00e9p ra hoa t\u1eeb 8,52 – 17,15% v\u00e0 ch\u01b0a \u0111\u1eadu qu\u1ea3, t\u1ef7 l\u1ec7 c\u00e0nh s\u1ed1 gh\u00e9p S\u1edf l\u00ea ra hoa trung b\u00ecnh dao \u0111\u1ed9ng t\u1eeb 23,33 – 34,80% v\u1edbi t\u1ef7 l\u1ec7 c\u00e0nh c\u00f3 qu\u1ea3 l\u00e0 3,8%. Trong khi \u0111\u00f3, \u1edf th\u00ed nghi\u1ec7m v\u1ec1 ph\u01b0\u01a1ng th\u1ee9c c\u1eaft g\u1ed1c c\u00e2y m\u1eb9 ch\u1ec9 duy nh\u1ea5t trong c\u00f4ng th\u1ee9c c\u1eaft to\u00e0n b\u1ed9 c\u00e2y m\u1eb9 theo \u0111\u00e1m \u0111\u1ec3 t\u1ea1o g\u1ed1c gh\u00e9p c\u00f3 5% s\u1ed1 c\u00e0nh gh\u00e9p \u0111\u00e3 ra hoa nh\u01b0ng ch\u01b0a \u0111\u1eadu qu\u1ea3.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Gh\u00e9p \u0111\u1ed5i t\u00e1n, S\u1edf ch\u00e8, S\u1edf l\u00ea<\/td>\n<\/tr>\n

\n

<\/a>Effects of cutting height and methods of mother trees on growth of scions of Camellia varieties in Nghe An and Quang Ninh province<\/strong><\/p>\n

Many areas of camellia plantations in localities have now been degraded. So productivity and quality of fruits and seeds are decreasing, leading to low economic efficiency. In order to improve the productivity and quality of the these plantations, canopy grafting is a quick solution for harvesting with higher yield and quality. The results of research on technical measures of grafting and changing the canopy for varieties of Camellia <\/em>spp. by cutting the stump of the mother tree at different heights and by different methods of cutting the mother tree to create grafted shoots have shown that, the scions in the experiments grew and developed relatively well and initially showed great promise in restoring the old, degraded camellia plantations. After 24 months of grafting, the scions of the camellia varieties in the experiment had the average survival rate ranging from 81.19 – 90.63% and there was no difference between the experimental treatments. The scions of both camellia varieties in the experimental treatments showed relatively good growth and there were differences between the experimental treatments. With both varieties of Camellia sasanqua<\/em> and Camellia vietnamensis<\/em>, the treatment left the cutting height of 1.5 m and the treatment of cutting the mother tree in groups for the best growth of the scions. Although the grafting time was only 2 years, some of the scions in the experimental treatments of both varieties of camellia had flowered, especially in the experiment on cutting height of the mother trees. The variety of Camellia sasanqua<\/em> gives the ratio of flowering scions from 8.52 – 17.15% and not yet bearing fruit, the ratio of scions flowering on average ranges from 23.33 – 34.80% with the rate of fruiting branches is 3.8%. Meanwhile, in the experiment on the method of cutting the mother trees, only in the treatment of cutting the whole mother tree in groups with 5% of the scions flowered but did not bear fruit.<\/p>\n

Keywords:<\/em><\/strong> Canopy grafting, Camellia sasanqua<\/em>, Camellia vietnamensis<\/em><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u00d4 H\u00ccNH H\u00d3A PH\u00c2N B\u1ed0 T\u1ea6N S\u1ed0 C\u1ee6A C\u00c1C \u0110\u1ea0I L\u01af\u1ee2NG SINH TR\u01af\u1edeNG CHO R\u1eeaNG TR\u1ed2NG SA M\u1ed8C<\/p>\n

<\/a>B\u00f9i M\u1ea1nh H\u01b0ng<\/p>\n

B\u1ed9 m\u00f4n \u0110i\u1ec1u tra quy ho\u1ea1ch, Khoa L\u00e2m h\u1ecdc, \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p,
\nXu\u00e2n Mai, Ch\u01b0\u01a1ng M\u1ef9, H\u00e0 N\u1ed9i, Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nh\u1eefng hi\u1ec3u bi\u1ebft v\u1ec1 ph\u00e2n b\u1ed1 t\u1ea7n s\u1ed1 theo k\u00edch th\u01b0\u1edbc c\u00e2y r\u1eebng l\u00e0 \u0111i\u1ec1u th\u1ef1c s\u1ef1 c\u1ea7n thi\u1ebft \u0111\u1ec3 qu\u1ea3n l\u00fd h\u1ec7 sinh th\u00e1i r\u1eebng b\u1ec1n v\u1eefng. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m t\u00ecm hi\u1ec3u \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng, l\u1ef1a ch\u1ecdn v\u00e0 so s\u00e1nh c\u00e1c ph\u00e2n b\u1ed1 t\u1ed1t nh\u1ea5t cho ph\u00e2n b\u1ed1 t\u1ea7n su\u1ea5t c\u1ee7a ch\u00fang t\u1ea1i L\u00e0o Cai. Nghi\u00ean c\u1ee9u \u0111\u00e3 thi\u1ebft l\u1eadp 9 \u00f4 cho c\u00e1c l\u00e2m ph\u1ea7n Sa m\u1ed9c v\u00e0 \u0111o \u0111\u1ebfm c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y. Nghi\u00ean c\u1ee9u \u0111\u00e3 th\u1eed nghi\u1ec7m 64 ph\u00e2n ph\u1ed1i l\u00fd thuy\u1ebft. K\u1ebft qu\u1ea3 cho th\u1ea5y \u0111\u01b0\u1eddng k\u00ednh trung b\u00ecnh l\u00e0 16,41 cm, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n trung b\u00ecnh l\u00e0 71,11 cm. Chi\u1ec1u cao v\u00e0 chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh trung b\u00ecnh l\u1ea7n l\u01b0\u1ee3t l\u00e0 6,71 m v\u00e0 2,81 m. M\u1ee9c \u0111\u1ed9 \u0111\u1ed3ng nh\u1ea5t cao h\u01a1n gi\u1eefa chi\u1ec1u cao v\u00e0 chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh. Ng\u01b0\u1ee3c l\u1ea1i, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn h\u01a1n so v\u1edbi c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng c\u00f2n l\u1ea1i. Ph\u00e2n b\u1ed1 chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n v\u00e0 \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c c\u00f3 d\u1ea1ng l\u1ec7ch tr\u00e1i. Trong khi \u0111\u00f3, ph\u00e2n b\u1ed1 t\u1ea7n s\u1ed1 c\u1ee7a chi\u1ec1u cao v\u00fat ng\u1ecdn l\u1ea1i l\u1ec7ch ph\u1ea3i. Ph\u00e2n b\u1ed1 Gen. Gamma (4P) l\u00e0 ph\u00e2n b\u1ed1 t\u1ed1t nh\u1ea5t cho \u0111\u01b0\u1eddng k\u00ednh, ph\u00e2n b\u1ed1 Wakeby l\u1ea1i l\u00e0 ph\u00e2n b\u1ed1 t\u1ed1t nh\u1ea5t cho \u0111\u01b0\u1eddng k\u00ednh t\u00e1n. V\u1edbi \u0111\u1ea1i l\u01b0\u1ee3ng chi\u1ec1u cao, ph\u00e2n b\u1ed1 Dagum (4P) l\u00e0 ph\u00e2n b\u1ed1 \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cao nh\u1ea5t. Ng\u01b0\u1ee3c l\u1ea1i, v\u1edbi chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh th\u00ec ph\u00e2n b\u1ed1 Fatigue Life (3P) x\u1ebfp h\u1ea1ng cao nh\u1ea5t. Nh\u1eefng m\u00f4 h\u00ecnh t\u1ed1t nh\u1ea5t n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ec1 xu\u1ea5t c\u00e1c bi\u1ec7n ph\u00e1p l\u00e2m sinh v\u00e0 g\u00f3p ph\u1ea7n qu\u1ea3n l\u00fd v\u00e0 quy ho\u1ea1ch r\u1eebng b\u1ec1n v\u1eefng \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u v\u00e0 c\u00e1c v\u00f9ng c\u00f3 \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng t\u1ef1.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> L\u00e0o Cai, m\u00f4 h\u00ecnh h\u00f3a, ph\u00e2n b\u1ed1 t\u1ea7n s\u1ed1, Sa m\u1ed9c<\/td>\n<\/tr>\n

\n

<\/a>Tree-size variable frequency distribution modelling for Cunminghamia lanceolata <\/em>plantation<\/strong><\/p>\n

Understanding tree-size frequency distributions is essential for sustainable forest ecosystem management. This study was conducted to understand characteristics of growth quantities, select and compare the best distributions for their frequency distributions in Lao Cai. The study established 9 plots for Cunminghamia lanceolata<\/em> stands and measured plannt growth variables. The study tested 64 theoretical distributions. The results showed that the average diameter was 16.41 cm, the average crown diameter was 71.11 cm. The average total height and commercial height were 6.71 m and 2.81 m, respectively. The similarity between the height and the commercial height was higher. In contrast, the crown diameter had a large difference with the remaining quantities. The distribution of commercial height, crown diameter and diameter were left skewed. Meanwhile, the frequency distribution of the total height was right skewed. Gene. Gamma (4P) was the best distribution for diameter, while the Wakeby distribution was the best distribution for crown diameter. For the total height, the Dagum (4P) distribution had the highest ranking. In contrast, for the commercial height, the Fatigue Life (3P) distribution ranked highest. These best models can be used to recommend silvicultural measures and contribute to sustainable forest management and planning in the study area and areas with similar conditions.<\/p>\n

Keywords:<\/em><\/strong> Cunminghamia lanceolata<\/em>, frequency distribution, Lao Cai, modelling<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>B\u01af\u1edaC \u0110\u1ea6U NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A CH\u1ebe PH\u1ea8M\u00a0N\u1ea4M R\u1ec4 N\u1ed8I C\u1ed8NG SINH AM \u0110\u1ebeN T\u1ef6 L\u1ec6 S\u1ed0NG V\u00c0 SINH TR\u01af\u1edeNG\u00a0C\u1ee6A KEO LAI V\u00c0 KEO L\u00c1 TR\u00c0M TR\u1ed2NG TR\u00caN \u0110\u1ea4T B\u00c3I TH\u1ea2I
\nKHAI TH\u00c1C THAN \u0110\u00d4NG CAO S\u01a0N \u1ede QU\u1ea2NG NINH<\/p>\n

<\/a>V\u0169 Qu\u00fd \u0110\u00f4ng1<\/sup>, L\u00ea V\u0103n Th\u00e0nh1<\/sup>, L\u00ea Th\u1ecb Thu H\u1eb1ng1<\/sup>, Ph\u1ea1m Ng\u1ecdc Th\u00e0nh1<\/sup>, H\u00e0 \u0110\u00ecnh Long1<\/sup>, \u0110\u1ed7 M\u1ea1nh D\u0169ng2<\/sup>, Nguy\u1ec5n Ho\u00e0ng Hu\u00e2n2<\/sup>, Ph\u1ea1m Tu\u1ea5n Anh2<\/sup>,<\/sub> Gi\u00e1p V\u0103n Ki\u00ean2<\/sup><\/p>\n

[1]<\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng
\n2<\/sup>C\u00f4ng ty CP Tin h\u1ecdc, C\u00f4ng ngh\u1ec7, M\u00f4i tr\u01b0\u1eddng (VINACOMIN)<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u tr\u1ed3ng keo lai v\u00e0 Keo l\u00e1 tr\u00e0m tr\u00ean b\u00e3i th\u1ea3i \u0110\u00f4ng Cao S\u01a1n, t\u1ec9nh Qu\u1ea3ng Ninh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf \u0111\u1ed9 cao 300 m so v\u1edbi m\u1eb7t bi\u1ec3n, theo m\u1eadt \u0111\u1ed9 2.500 c\u00e2y\/ha (kho\u1ea3n c\u00e1ch 2 \u00b4 2 m) v\u00e0 5.000 c\u00e2y\/ha (kho\u1ea3ng c\u00e1ch 2 \u00b4 1 m) v\u00e0 b\u00f3n 5 g ch\u1ebf ph\u1ea9m n\u1ea5m r\u1ec5 n\u1ed9i c\u1ed9ng sinh AM (100 IP\/g) cho m\u1ed7i c\u00e2y trong c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m. K\u1ebft qu\u1ea3 cho th\u1ea5y, sau 12 th\u00e1ng c\u00e2y keo \u0111\u01b0\u1ee3c b\u00f3n ch\u1ebf ph\u1ea9m AM c\u00f3 t\u1ef7 l\u1ec7 s\u1ed1ng \u0111\u1ea1t t\u1eeb 88,75 – 94,58%, \u0111\u01b0\u1eddng k\u00ednh g\u1ed1c t\u1eeb 30,9 – 35,72 mm, chi\u1ec1u cao v\u00fat ng\u1ecdn t\u1eeb 185,71 – 210,92 cm, \u0111\u01b0\u1eddng k\u00ednh t\u00e1n t\u1eeb 129,39 – 138,62 cm cao h\u01a1n h\u1eb3n (p<\/em> < 0,05) so v\u1edbi c\u00f4ng th\u1ee9c \u0111\u1ed1i ch\u1ee9ng (kh\u00f4ng \u0111\u01b0\u1ee3c b\u00f3n ch\u1ebf ph\u1ea9m AM) v\u1edbi c\u00e1c ch\u1ec9 s\u1ed1 t\u01b0\u01a1ng \u1ee9ng l\u00e0 72,50 – 75%, 24,76 – 28,68 mm, 153,62 – 176,37 cm v\u00e0 109,42 – 121,13 cm. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u b\u01b0\u1edbc \u0111\u1ea7u cho th\u1ea5y ch\u1ebf ph\u1ea9m AM c\u00f3 ti\u1ec1m n\u0103ng r\u1ea5t cao trong vi\u1ec7c tr\u1ed3ng keo \u0111\u1ec3 ph\u1ee7 xanh v\u00e0 ph\u1ee5c h\u1ed3i c\u00e1c b\u00e3i \u0111\u1ea5t th\u1ea3i sau khai th\u00e1c.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> C\u00f4ng ngh\u1ec7 sinh h\u1ecdc m\u00f4i tr\u01b0\u1eddng, n\u1ea5m r\u1ec5 n\u1ed9i c\u1ed9ng sinh AM, ph\u1ee5c h\u1ed3i b\u00e3i th\u1ea3i<\/td>\n<\/tr>\n

\n

<\/a>Preliminary research on the effects of AM (Arbuscular mycorrhizal<\/em>) on survival rate and growth of Acacia hybrid and Acacia auriculiformis<\/em> planted at Dong Cao S\u01a1n coal mining waste land in Quang Ninh province<\/strong><\/p>\n

Research on the growth of Acacia hybrid and Acacia auriculiformis<\/em> planted at Dong Cao Son mining waste land (300 m above the sea level) in Quang Ninh province with the densities of 2,500 trees\/ha (spacing of 2 \u00b4 2 m) and 5,000 trees\/ha (spacing of 2 \u00b4 1 m) and applied 5 g of AM (Arbuscular mycorrhiza<\/em>) Bio fertilizer (100 IP\/g) per tree. After 12 months of applying AM Bio fertilizer, the Acacia survival rate ranged from 88.75 – 94.58%, the base diameter ranged from 30.90 – 35.72 mm, and the height ranged from 185.71 – 210.92 cm, the tree canopy ranged from 129.39 -138.62 cm which are higher (p<\/em> < 0,05) than those in the control (without AM fertilization) in which the survival rate,\u00a0 base diameter and height were 72.50 – 75%, 24.76 – 28.68 mm, 153.62 – 176.37 cm and 109.42 – 121.13 cm respectively. The preliminary reseach result showed that the AM Bio fertilizer is potential for planting Acacia to greening and recover coal mining waste land.<\/p>\n

Keywords:<\/em><\/strong> Arbuscular mycorrhiza<\/em>, bioremediation, landfill rehabilitation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>H\u00c0NH VI L\u1ef0A CH\u1eccN C\u00c2Y CH\u1ee6 C\u1ee6A LO\u00c0I M\u1eccT\u00a0MANG N\u1ea4M Platypus quercivorus <\/em>Murayama (Coleoptera: Playpodidae) TH\u00d4NG QUA C\u00c1C H\u1ee2P CH\u1ea4T HO\u00c1 H\u1eccC D\u1ec4 BAY H\u01a0I T\u1eea TH\u1ef0C V\u1eacT<\/p>\n

<\/a>Ph\u1ea1m Duy Long, \u0110\u00e0o Ng\u1ecdc Quang<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u B\u1ea3o v\u1ec7 r\u1eebng, Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1ecdt mang n\u1ea5m l\u00e0 m\u1ed9t nh\u00f3m c\u00e1c lo\u00e0i c\u00f4n tr\u00f9ng c\u00e1nh c\u1ee9ng nguy hi\u1ec3m cho c\u00e2y tr\u1ed3ng l\u00e2m nghi\u1ec7p. Trong r\u1eebng t\u1ef1 nhi\u00ean, c\u00e2y ch\u1ee7 \u01b0a th\u00edch c\u1ee7a m\u1ecdt mang n\u1ea5m th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 xen l\u1eabn c\u00f9ng v\u1edbi c\u00e2y ch\u1ee7 kh\u00f4ng \u01b0a th\u00edch c\u1ee7a ch\u00fang. Nhi\u1ec1u nghi\u00ean c\u1ee9u cho r\u1eb1ng \u0111\u1ec3 t\u00ecm ki\u1ebfm v\u00e0 l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c c\u00e2y ch\u1ee7 \u01b0a th\u00edch m\u1ecdt mang n\u1ea5m \u0111\u00e3 d\u1ef1a v\u00e0o c\u00e1c h\u1ee3p ch\u1ea5t h\u00f3a h\u1ecdc d\u1ec5 bay h\u01a1i t\u1eeb th\u1ef1c v\u1eadt. Lo\u00e0i m\u1ecdt mang n\u1ea5m Platypus quercivorus<\/em> Murayama th\u01b0\u1eddng g\u00e2y h\u1ea1i n\u1eb7ng cho c\u00e1c lo\u00e0i c\u00e2y thu\u1ed9c h\u1ecd S\u1ed3i t\u1ea1i Nh\u1eadt B\u1ea3n t\u1eeb nh\u1eefng n\u0103m 1980. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u1eb1m ki\u1ec3m tra ph\u1ea3n \u1ee9ng h\u00e0nh vi c\u1ee7a m\u1ecdt P. quercivorus<\/em> \u0111\u1ebfn c\u00e1c h\u1ee3p ch\u1ea5t d\u1ec5 bay h\u01a1i t\u1eeb l\u00e1 c\u1ee7a s\u00e1u lo\u00e0i th\u1ef1c v\u1eadt v\u00e0 gi\u1eefa tr\u1ea1ng th\u00e1i sinh l\u00fd kh\u00e1c nhau c\u1ee7a c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt n\u00e0y th\u00f4ng qua m\u1ed9t kh\u1ee9u gi\u00e1c k\u1ebf h\u00ecnh ch\u1eef Y. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c h\u1ee3p ch\u1ea5t d\u1ec5 bay h\u01a1i t\u1eeb m\u1eabu l\u00e1 \u0111\u01b0\u1ee3c thu th\u1eadp v\u00e0 ph\u00e2n t\u00edch b\u1eb1ng m\u00e1y s\u1eafc k\u00fd kh\u00ed – kh\u1ed1i ph\u1ed5. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y lo\u00e0i m\u1ecdt P. quercivorus<\/em> b\u1ecb d\u1eabn d\u1ee5 b\u1edfi c\u00e1c h\u1ee3p ch\u1ea5t d\u1ec5 bay h\u01a1i t\u1eeb th\u1ef1c v\u1eadt v\u00e0 ch\u00fang ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c c\u00e1c h\u1ee3p ch\u1ea5t bay h\u01a1i gi\u1eefa c\u00e2y kh\u1ecfe m\u1ea1nh v\u00e0 c\u00e2y b\u1ecb suy y\u1ebfu. C\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t v\u1ec1 th\u00e0nh ph\u1ea7n c\u00e1c h\u1ee3p ch\u1ea5t d\u1ec5 bay h\u01a1i gi\u1eefa c\u00e1c lo\u00e0i th\u1ef1c v\u1eadt v\u00e0 gi\u1eefa tr\u1ea1ng th\u00e1i sinh l\u00fd c\u1ee7a m\u1ed7i lo\u00e0i c\u00e2y. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u00e0y g\u1ee3i \u00fd r\u1eb1ng c\u00e1c h\u1ee3p ch\u1ea5t h\u00f3a h\u1ecdc d\u1ec5 bay h\u01a1i l\u00e0 m\u1ed9t lo\u1ea1i t\u00edn hi\u1ec7u giao ti\u1ebfp quan tr\u1ecdng m\u00e0 m\u1ecdt P. quercivorus<\/em> s\u1eed d\u1ee5ng \u0111\u1ec3 l\u1ef1a ch\u1ecdn c\u00e2y ch\u1ee7 trong r\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Ch\u1ea5t h\u1eefu c\u01a1 d\u1ec5 bay h\u01a1i, M\u1ecdt mang n\u1ea5m, Platypus quercivorus<\/em>, s\u1eafc k\u00fd kh\u00ed – kh\u1ed1i ph\u1ed5<\/td>\n<\/tr>\n

\n

<\/a>Host recognization of the ambrosia beetle Platypus quercivorus <\/em>Murayama (Coleoptera: Playpodidae) based on volatile substances<\/strong><\/p>\n

Stem-boring beetles (Coleoptera: Scolytidae & Platypodidae) are an important group of insect pests causing severe damage to forestry trees throughout the world. In a mixed forest, suitable host trees of these beetles are often scattered with their unsuitable host trees. Previous studies have shown that the host location and selection process of stem-boring beetles is mediated by plant-derrived volatiles. Platypus quercivorus<\/em> Murayama is a serious pest of oak trees in Japan since 1980s. In this study, we used a Y-tube olfactomer to examine the olfactory responses of P. quercivorus<\/em> to the chemical volatiles emitted from the leaves of different six tree species, and from fresh and stressed leaves of its host trees. In addition, the profiles of leaf volatiles from the six plant species were identified. Results showed that P. quercivorus<\/em> beetles were attracted to the chemical volatiles from the fresh leaves and were repelled by those from the stressed leaves. These findings indicate that the leaf volatiles are esessitial cues for host selection of P. quercivorus<\/em>.<\/p>\n

Keywords:<\/em><\/strong> Voleilte subtatance, stem-borer, Platypus quercivorus<\/em>, Gas chromatography mass spectrometry<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u1eb6C \u0110I\u1ec2M H\u00ccNH TH\u00c1I, V\u1eacT H\u1eacU V\u00c0 KH\u1ea2 N\u0102NG PH\u1ee4C H\u1ed2I\u00a0C\u1ee6A M\u1ed8T S\u1ed0 GIA \u0110\u00ccNH L\u00c1T HOA CH\u1ed0NG CH\u1ecaU S\u00c2U \u0110\u1ee4C N\u00d5N (Hypsipyla robusta<\/em>)<\/p>\n

<\/a>Tr\u1ea7n Th\u1ecb L\u1ec7 Tr\u00e01,2<\/sup>, Ph\u1ea1m Quang Thu1<\/sup>, Nguy\u1ec5n Minh Ch\u00ed1<\/p>\n

1 <\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2 <\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc T\u00e2y Nguy\u00ean<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u1ef1 g\u00e2y h\u1ea1i c\u1ee7a s\u00e2u \u0111\u1ee5c n\u00f5n (Hypsipyla robusta<\/em>) lu\u00f4n l\u00e0 tr\u1edf ng\u1ea1i l\u1edbn \u0111\u1ed1i v\u1edbi vi\u1ec7c tr\u1ed3ng r\u1eebng L\u00e1t hoa. V\u00ec v\u1eady, vi\u1ec7c ch\u1ecdn gi\u1ed1ng L\u00e1t hoa ch\u1ed1ng ch\u1ecbu s\u00e2u \u0111\u1ee5c n\u00f5n \u0111ang r\u1ea5t \u0111\u01b0\u1ee3c quan t\u00e2m. Nghi\u00ean c\u1ee9u nh\u1eb1m so s\u00e1nh m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i, v\u1eadt h\u1eadu v\u00e0 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i sau khi b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n c\u1ee7a n\u0103m gia \u0111\u00ecnh L\u00e1t hoa (LH26, LH32, LH87, LH108 v\u00e0 LH109) \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu s\u00e2u \u0111\u1ee5c n\u00f5n v\u00e0 5 gia \u0111\u00ecnh (LH48, LH49, LH56, LH59 v\u00e0 LH71) \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 m\u1eabn c\u1ea3m. K\u1ebft qu\u1ea3 cho th\u1ea5y c\u00e1c gia \u0111\u00ecnh ch\u1ed1ng ch\u1ecbu \u0111\u1ec1u c\u00f3 chi\u1ec1u d\u00e0i ng\u1ecdn non ng\u1eafn, v\u1ecf d\u00e0y, c\u1ee9ng, nhi\u1ec1u l\u00f4ng t\u01a1 v\u00e0 ph\u1ea5n h\u01a1n so v\u1edbi c\u00e1c gia \u0111\u00ecnh m\u1eabn c\u1ea3m. Th\u1eddi gian t\u1eeb khi c\u00e2y k\u1ebft th\u00fac r\u1ee5ng l\u00e1 \u0111\u1ebfn khi n\u1ea3y l\u1ed9c th\u01b0\u1eddng k\u00e9o d\u00e0i kho\u1ea3ng hai th\u00e1ng, ri\u00eang gia \u0111\u00ecnh LH108 v\u00e0 LH109 c\u00f3 th\u1eddi \u0111i\u1ec3m n\u1ea3y l\u1ed9c l\u1ec7ch pha so v\u1edbi c\u00e1c gia \u0111\u00ecnh kh\u00e1c. C\u00e1c gia \u0111\u00ecnh ch\u1ed1ng ch\u1ecbu c\u00f3 kh\u1ea3 n\u0103ng ph\u1ee5c h\u1ed3i t\u1ed1t h\u01a1n v\u1edbi th\u1eddi gian ph\u1ee5c h\u1ed3i nhanh v\u00e0 th\u01b0\u1eddng ch\u1ec9 c\u00f3 m\u1ed9t ng\u1ecdn ch\u00ednh thay th\u1ebf sau khi b\u1ecb s\u00e2u \u0111\u1ee5c n\u00f5n. S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 h\u00ecnh th\u00e1i v\u00e0 v\u1eadt h\u1eadu s\u1ebd l\u00e0 c\u01a1 s\u1edf \u0111\u1ec3 s\u00e0ng l\u1ecdc c\u00e1c gi\u1ed1ng L\u00e1t hoa ch\u1ed1ng ch\u1ecbu s\u00e2u \u0111\u1ee5c n\u00f5n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> L\u00e1t hoa, s\u00e2u \u0111\u1ee5c n\u00f5n, \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i, v\u1eadt h\u1eadu, gi\u1ed1ng ch\u1ed1ng ch\u1ecbu<\/td>\n<\/tr>\n

\n

<\/a>Morphology, phenology and recovery capacities of some Chukrasia tabularis <\/em>families tolerant to shoot borer (Hypsipyla robusta<\/em>)<\/strong><\/p>\n

The damage causing by shoot borer (Hypsipyla robusta<\/em>) has been a major obstacle to the afforestation of Chukrasia tabularis<\/em>. Thus the selection of tolerant varieties to the shoot borer has been attracted great interest. This study aimed to compare serveral characteristics, including morphology, phenology and resilience after shoot borer damage of the five tolerant families of C. tabularis<\/em> to shoot borer (LH26, LH32, LH87, LH108 and LH109) and 5 susceptible families (LH48, LH49, LH56, LH59 and LH71). Results showed that the tolerant families had shorter shoot length, thicker and harder bark, and more trichome than the susceptible families. It generally takes about 2 months for trees\u2019 from the last deciduous phenomenon to sprout new buds. LH108 and LH109 had a different time of blooming compared to other families. The tolerant families were more resilient with a quick recovery time and often had only one replacement main shoot after being damaged by shoot borer. The study results of this study will be the basis for screening the tolerant varieties of C. tabularis<\/em> to this insect pest.<\/p>\n

Keywords:<\/em><\/strong> Chukrasia tabularis<\/em>, shoot borer, Hypsipyla robusta<\/em>, morphological characteristics, phenology, tolerant varieties<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>M\u00d4 H\u00ccNH M\u00d4 PH\u1eceNG QU\u00c1 TR\u00ccNH S\u1ea4Y QUY CHU\u1ea8N\u00a0G\u1ed6 KEO TAI T\u01af\u1ee2NG (Acacia mangium <\/em>Willd.)<\/p>\n

<\/a>H\u00e0 Ti\u1ebfn M\u1ea1nh1<\/sup>, Ph\u1ea1m V\u0103n Ch\u01b0\u01a1ng2<\/sup>, B\u00f9i Duy Ng\u1ecdc1<\/sup>, Tr\u1ea7n \u0110\u0103ng S\u00e1ng1<\/sup><\/p>\n

1 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng
\n2 <\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

M\u1ed9t m\u00f4 h\u00ecnh to\u00e1n h\u1ecdc \u0111\u1ee7 m\u1ea1nh \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng \u0111\u1ec3 m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n \u1ea9m v\u00e0 v\u1eadn chuy\u1ec3n nhi\u1ec7t khi s\u1ea5y quy chu\u1ea9n g\u1ed7 Keo tai t\u01b0\u1ee3ng (Acacia mangium <\/em>Willd.). M\u00f4 h\u00ecnh n\u00e0y s\u1eed d\u1ee5ng n\u1ec1n t\u1ea3ng l\u1eadp tr\u00ecnh c\u1ee7a m\u00f4 h\u00ecnh Transpore hai chi\u1ec1u v\u1edbi c\u00e1c d\u1eef li\u1ec7u th\u00f4ng s\u1ed1 m\u00f4i tr\u01b0\u1eddng s\u1ea5y nh\u1eadp v\u00e0o t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ebb s\u1ea5y th\u1ef1c nghi\u1ec7m \u0111\u1ec3 so s\u00e1nh \u0111\u00e1nh gi\u00e1 hi\u1ec7u l\u1ef1c d\u1ef1 \u0111o\u00e1n c\u1ee7a m\u00f4 h\u00ecnh. C\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a g\u1ed7 Keo tai t\u01b0\u1ee3ng bao g\u1ed3m kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang, \u0111\u1ed9 r\u1ed7ng, \u0111i\u1ec3m b\u00e3o h\u00f2a th\u1edb g\u1ed7 (FSP), h\u1ec7 s\u1ed1 th\u1ea5m d\u1eabn, h\u1ec7 s\u1ed1 khu\u1ebfch t\u00e1n l\u00e0 nh\u00f3m d\u1eef li\u1ec7u nh\u1eadp v\u00e0o th\u1ee9 hai cho m\u00f4 h\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh m\u1ed9t c\u00e1ch b\u00e0i b\u1ea3n v\u00e0 t\u1ec9 m\u1ec9 trong nghi\u00ean c\u1ee9u kh\u00e1c l\u00e0m t\u00ednh ch\u00ednh x\u00e1c khi d\u1ef1 \u0111o\u00e1n t\u1ed5ng th\u1eddi gian s\u1ea5y c\u1ee7a m\u00f4 h\u00ecnh l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i cao (sai s\u1ed1 9,7% khi so s\u00e1nh v\u1edbi m\u1ebb s\u1ea5y th\u1ef1c nghi\u1ec7m). K\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng li\u00ean t\u1ee5c theo su\u1ed1t th\u1eddi gian s\u1ea5y c\u1ee7a m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n tr\u00ean 4 \u0111\u1ed3 th\u1ecb g\u1ed3m 2 \u0111\u1ed3 th\u1ecb l\u01b0\u1edbi 3D m\u00f4 ph\u1ecfng di\u1ec5n bi\u1ebfn \u1ea9m v\u00e0 nhi\u1ec7t t\u1ea1i t\u1ea5t c\u1ea3 c\u00e1c v\u1ecb tr\u00ed theo 2 m\u1eb7t c\u1eaft ngang v\u00e0 d\u1ecdc c\u1ee7a thanh g\u1ed7, 1 \u0111\u1ed3 th\u1ecb 2D m\u00f4 ph\u1ecfng \u0111\u1ed9 \u1ea9m b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ed9 \u1ea9m trung b\u00ecnh c\u1ee7a thanh g\u1ed7, 1 \u0111\u1ed3 th\u1ecb 2D m\u00f4 ph\u1ecfng nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t v\u00e0 trong t\u00e2m thanh g\u1ed7. K\u1ebft qu\u1ea3 so s\u00e1nh 2 \u0111\u01b0\u1eddng di\u1ec5n bi\u1ebfn gi\u1ea3m \u0111\u1ed9 \u1ea9m (MC) c\u1ee7a m\u1ebb s\u1ea5y th\u1eed nghi\u1ec7m v\u00e0 m\u00f4 h\u00ecnh cho th\u1ea5y sai s\u1ed1 b\u00ecnh ph\u01b0\u01a1ng trung b\u00ecnh g\u1ed1c (RMSE) t\u1ed5ng th\u1ec3 cho c\u1ea3 qu\u00e1 tr\u00ecnh s\u1ea5y t\u1eeb MC ban \u0111\u1ea7u \u0111\u1ebfn MC cu\u1ed1i c\u00f9ng \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n l\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn (20,82%). Giai \u0111o\u1ea1n s\u1ea5y t\u1eeb khi g\u1ed7 c\u00f2n t\u01b0\u01a1i v\u1ec1 FSP, s\u1ef1 sai kh\u00e1c n\u00e0y l\u00e0 r\u1ea5t l\u1edbn, trong khi giai \u0111o\u1ea1n s\u1ea5y ti\u1ebfp theo, 2 \u0111\u01b0\u1eddng \u0111\u1ed3 th\u1ecb n\u00e0y l\u00e0 r\u1ea5t tr\u00f9ng kh\u1edbp nhau. V\u1edbi nh\u1eefng k\u1ebft qu\u1ea3 b\u01b0\u1edbc \u0111\u1ea7u \u0111\u1ea1t \u0111\u01b0\u1ee3c, m\u00f4 h\u00ecnh n\u00e0y l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 t\u1ed1t gi\u00fap d\u1ef1 \u0111o\u00e1n v\u00e0 m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh s\u1ea5y trong nghi\u00ean c\u1ee9u l\u1ef1a ch\u1ecdn ch\u1ebf \u0111\u1ed9 s\u1ea5y cho c\u00e1c lo\u1ea1i g\u1ed7 l\u00e1 r\u1ed9ng.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Keo tai t\u01b0\u1ee3ng, m\u00f4 h\u00ecnh to\u00e1n h\u1ecdc, m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh s\u1ea5y<\/td>\n<\/tr>\n

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<\/a>The conventional drying model applied to Acacia mangium <\/em>Willd. timber<\/strong><\/p>\n

A robust mathematical model was built to simulate the heat and mass transfer process during conventional drying of the Acacia mangium<\/em> Willd. timber. This model used codes of the two-dimensions Transpore model with the same boundary condition data as the experimental drying batch to evaluate the predictive validity of the model. The properties of Acacia mangium<\/em> Willd. wood which were methodically and meticulously measured in other studies including basic density, porosity, fibre saturation point (FSP), permeability and diffusion was the second input data for the model. This made the prediction of the total drying time with high accuracy (9.7% error when compared with the experimental drying batch). Simulation results during drying time of the model were shown on 4 graphs. In which, two 3D grid graphs simulated moisture and heat changes at all positions in the transverse and longitudinal sections, one 2D graph simulated the surface and averaged moisture, one 2D graph simulated the surface and core temperature of the wood. The comparison between the simulated and experimental averaged MC curves showed that the root mean square error (RMSE) for the whole drying process from the initial to the final MC was relatively large (20.82%). This difference was very large at above FSP, while these two curve were very fit at below FSP. With the results obtained, this model was a good tool to help predict and simulate the drying process in the optimise drying schedules for hardwood.<\/p>\n

Keywords:<\/em><\/strong> Acacia mangium<\/em> Willd., mathematical model, simulation drying<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>C\u00d4NG NGH\u1ec6 T\u1ea0O KEO MELAMINE UREA FORMALDEHYDE (MUF) CHO S\u1ea2N XU\u1ea4T V\u00c1N D\u00c1N TH\u00c2N THI\u1ec6N M\u00d4I TR\u01af\u1edcNG\u00a0\u0110\u00c1P \u1ee8NG TI\u00caU CHU\u1ea8N XU\u1ea4T KH\u1ea8U (CARB – P2\/E0 \/F***\/F****)<\/p>\n

\u00a0<\/a>Nguy\u1ec5n H\u1ed3ng Minh, T\u1ea1 Th\u1ecb Thanh H\u01b0\u01a1ng<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u C\u00f4ng nghi\u1ec7p r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Xu\u1ea5t ph\u00e1t t\u1eeb y\u00eau c\u1ea7u th\u1ef1c ti\u1ec5n c\u00f4ng nghi\u1ec7p s\u1ea3n xu\u1ea5t v\u00e1n g\u1ed7 d\u00e1n xu\u1ea5t kh\u1ea9u d\u00f9ng cho \u0111\u1ed3 m\u1ed9c n\u1ed9i th\u1ea5t cao c\u1ea5p v\u1edbi h\u00e0m l\u01b0\u1ee3ng ph\u00e1t th\u1ea3i formaldehyde d\u01b0 si\u00eau th\u1ea5p, ph\u1ea3i \u0111\u1ea1t \u00a3 0,04 – 0,07ppm t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c c\u1ea5p CARB – P2\/E0\/F**** theo quy \u0111\u1ecbnh c\u1ee7a M\u1ef9, ch\u00e2u \u00c2u v\u00e0 Nh\u1eadt B\u1ea3n; nghi\u00ean c\u1ee9u ho\u00e0n thi\u1ec7n c\u00f4ng ngh\u1ec7 t\u1ed5ng h\u1ee3p keo d\u00e1n g\u1ed7 Melamine Urea Formaldehyde (MUF) \u0111\u00e3 \u0111\u00e1nh gi\u00e1 t\u00e1c \u0111\u1ed9ng c\u1ee7a vi\u1ec7c thay \u0111\u1ed5i theo h\u01b0\u1edbng gi\u1ea3m t\u1ef7 l\u1ec7 nguy\u00ean li\u1ec7u Formaldehyde \u0111\u1ed1i v\u1edbi Urea + Melamine (F\/U+M) v\u00e0 t\u0103ng melamine \u1edf quy m\u00f4 s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p 3.000 kg\/m\u1ebb \u0111\u1ebfn h\u00e0m l\u01b0\u1ee3ng formaldehyde d\u01b0 c\u1ee7a keo v\u00e0 v\u00e1n g\u1ed7 d\u00e1n. C\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho ph\u00e9p t\u1ea1o s\u1ea3n ph\u1ea9m keo d\u00e1n MUF, d\u00f9ng cho s\u1ea3n xu\u1ea5t v\u00e1n d\u00e1n \u0111\u1ea1t c\u1ea5p ch\u1ea5t l\u01b0\u1ee3ng h\u00e0m l\u01b0\u1ee3ng formaldehyde d\u01b0 \u1edf m\u1ee9c 0,03 – 0,06ppm. V\u00e1n g\u1ed7 d\u00e1n c\u00f3 gi\u00e1 tr\u1ecb c\u01b0\u1eddng \u0111\u1ed9 ch\u1ecbu l\u1ef1c cao, \u0111\u1ed9 b\u1ec1n u\u1ed1n t\u0129nh MOR 70 Mpa, modul \u0111\u00e0n h\u1ed3i MOE 10234 Mpa, \u0111\u1ed9 tr\u01b0\u01a1ng n\u1edf v\u00e1n \u0111\u1ea1t m\u1ee9c th\u1ea5p 6,5%; c\u01b0\u1eddng \u0111\u1ed9 d\u00e1n d\u00ednh \u0111\u1ea1t m\u1ee9c Class 1 theo EN 314 – 1 & 2. V\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh ch\u1ea5t l\u01b0\u1ee3ng n\u00eau tr\u00ean, v\u00e1n g\u1ed7 d\u00e1n \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1eeb keo d\u00e1n MUF t\u1ed5ng h\u1ee3p ho\u00e0n to\u00e0n \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n xu\u1ea5t kh\u1ea9u \u0111\u1ebfn th\u1ecb tr\u01b0\u1eddng l\u1edbn c\u1ee7a Vi\u1ec7t Nam nh\u01b0 M\u1ef9, EU v\u00e0 Nh\u1eadt B\u1ea3n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Quy tr\u00ecnh t\u1ed5ng h\u1ee3p keo, keo Melamine Urea Formaldehyde (MUF), h\u00e0m l\u01b0\u1ee3ng d\u01b0 formaldehyde, v\u00e1n d\u00e1n, ti\u00eau chu\u1ea9n CARB – P2\/E0\/F****<\/td>\n<\/tr>\n

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<\/a>Synthesis technology of melamine urea formaldehyde adhesive (MUF) for eco – friendly plywood production meetting export requirement (CARB\/E0\/F****)<\/strong><\/p>\n

As derived from the practical requirements of the industry for exporting plywood with super low free formaldehyde emissions, it must be less then 0.04 – 0.07ppm corresponding to the levels of CARB – P2\/E0\/F****, according to the regulations of US, Europe and Japan; Researching on synthesis technology of Melamine Urea Formaldehyde (MUF) wood adhesive to evaluate the impact of changing toward reducing the mole ratio of Formaldehyde to Urea + Melamine (F\/U+M), while increasing melamine content in industrial production process (scale of 3,000 kg\/batch) to free formaldehyde content of the adhesive and plywood product. The research results showed that the MUF glue product, used for plywood production, to reach super low free formaldehyde content of the plywood at 0.03 – 0.06ppm. The plywood was made with high mechanical strength properties: modulus of rupture MOR = 70 Mpa, modulus of elasticity MOE = 10,234 Mpa, swelling coeficient is as low as 6.5% and the adhesion strength meet Class 1 according to EN 314 – 1 & 2. Applying the synthesized MUF adhesive produced succesfully plywood, which meet the export standards to for major export markets of Vietnam such as: USA, EU and Japan.<\/p>\n

Keywords:<\/em><\/strong> Adhesive synthesis process, Melamine Urea Formaldehyde (MUF) adhesive, free formaldehyde content, plywood, CARB – P2\/E0\/F***\/F**** standard<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>\u0110\u00c1NH GI\u00c1 TH\u1ef0C TR\u1ea0NG THU NH\u1eacP C\u1ee6A C\u00c1C H\u1ed8 GIA \u0110\u00ccNH\u00a0THAM GIA S\u1ea2N XU\u1ea4T L\u00c2M NGHI\u1ec6P\u00a0T\u1ea0I C\u00c1C T\u1ec8NH TRUNG DU MI\u1ec0N N\u00daI PH\u00cdA B\u1eaeC<\/p>\n

<\/a>\u0110\u1eb7ng Quang H\u01b0ng, Nguy\u1ec5n Xu\u00e2n \u0110\u00e0i, \u0110\u1ed7 Th\u1ecb Kim Nhung<\/p>\n

Vi\u1ec7n Nghi\u00ean c\u1ee9u Sinh th\u00e1i v\u00e0 M\u00f4i tr\u01b0\u1eddng r\u1eebng.<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

H\u1ed9 gia \u0111\u00ecnh (HG\u0110) \u0111ang \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c ph\u00e1t tri\u1ec3n ng\u00e0nh l\u00e2m nghi\u1ec7p n\u01b0\u1edbc ta hi\u1ec7n nay, tuy nhi\u00ean, s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p (SXLN) c\u1ee7a c\u00e1c HG\u0110 v\u1eabn c\u00f2n b\u1ed9c l\u1ed9 nhi\u1ec1u h\u1ea1n ch\u1ebf \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf c\u00e1c t\u1ec9nh Trung du mi\u1ec1n n\u00fai ph\u00eda B\u1eafc. B\u00e0i b\u00e1o n\u00e0y \u0111\u00e3 \u0111\u00e1nh gi\u00e1 ho\u1ea1t \u0111\u1ed9ng kinh t\u1ebf ch\u1ee7 y\u1ebfu c\u1ee7a c\u00e1c HG\u0110 tham gia s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p \u0111\u00f3 l\u00e0 tr\u1ed3ng c\u00e2y n\u00f4ng nghi\u1ec7p, ch\u0103n nu\u00f4i, tr\u1ed3ng r\u1eebng v\u00e0 nh\u1eadn kho\u00e1n b\u1ea3o v\u1ec7 r\u1eebng; C\u00e1c HG\u0110 d\u1ef1a v\u00e0o ch\u00ednh ti\u1ec1m l\u1ef1c, kh\u1ea3 n\u0103ng v\u1ec1 t\u00e0i ch\u00ednh, lao \u0111\u1ed9ng v\u00e0 \u0111i\u1ec1u ki\u1ec7n s\u1ea3n xu\u1ea5t c\u1ee5 th\u1ec3 c\u1ee7a m\u00ecnh \u0111\u1ec3 s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p, ch\u1ec9 c\u00f3 37,4% HG\u0110 ti\u1ebfp c\u1eadn v\u1ed1n vay c\u1ee7a c\u00e1c ng\u00e2n h\u00e0ng \u0111\u1ec3 \u0111\u1ea7u t\u01b0 s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p tuy nhi\u00ean m\u1ee9c vay c\u00f2n th\u1ea5p, ch\u01b0a \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea7u t\u01b0 l\u00e2m nghi\u1ec7p v\u1edbi chu k\u1ef3 d\u00e0i l\u1ea5y g\u1ed7 l\u1edbn; Hi\u1ec7u qu\u1ea3 c\u1ee7a s\u1ea3n su\u1ea5t l\u00e2m nghi\u1ec7p c\u1ee7a c\u00e1c HG\u0110 kh\u00e1c cao, c\u00e1c HG\u0110 tr\u1ed3ng c\u00e2y Qu\u1ebf \u1edf Y\u00ean B\u00e1i v\u1edbi chu k\u1ef3 10 – 12 n\u0103m \u0111em l\u1ea1i l\u1ee3i nhu\u1eadn kinh t\u1ebf cao nh\u1ea5t kho\u1ea3ng 45 tri\u1ec7u \u0111\u1ed3ng\/ha n\u0103m; Thu nh\u1eadp t\u1eeb l\u00e2m nghi\u1ec7p chi\u1ebfm t\u1ef7 tr\u1ecdng t\u01b0\u01a1ng \u0111\u1ed1i khi\u00eam t\u1ed1n, ch\u1ec9 chi\u1ebfm kho\u1ea3ng 13,8% t\u1ed5ng thu nh\u1eadp c\u1ee7a c\u00e1c HG\u0110 \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c HG\u0110 \u1edf v\u00f9ng T\u00e2y B\u1eafc (S\u01a1n La, Lai Ch\u00e2u) th\u00ec thu nh\u1eadp t\u1eeb l\u00e2m nghi\u1ec7p r\u1ea5t th\u1ea5p do kh\u00f4ng c\u00f3 ho\u1ea1t \u0111\u1ed9ng khai th\u00e1c r\u1eebng s\u1ea3n xu\u1ea5t; Li\u00ean quan t\u1edbi s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p c\u1ee7a c\u00e1c HG\u0110 c\u00f3 r\u1ea5t nhi\u1ec1u c\u01a1 ch\u1ebf, ch\u00ednh s\u00e1ch \u0111ang \u0111\u01b0\u1ee3c tri\u1ec3n khai v\u00e0o th\u1ef1c ti\u1ec5n v\u00e0 \u0111\u00e3 t\u00e1c \u0111\u1ed9ng r\u1ea5t t\u00edch c\u1ef1c t\u1edbi c\u00e1c h\u1ed9 gia \u0111\u00ecnh. Nh\u01b0ng b\u00ean c\u1ea1nh \u0111\u00f3 c\u0169ng c\u00f2n c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf, t\u1ed3n t\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u00f3m t\u00e1c gi\u1ea3 ch\u1ec9 ra, \u0111\u1ed3ng th\u1eddi t\u00e1c gi\u1ea3 c\u0169ng \u0111\u00e3 \u0111\u01b0a ra m\u1ed9t s\u1ed1 c\u00e1c gi\u1ea3i ph\u00e1p, \u0111\u1ec1 xu\u1ea5t v\u1ec1 c\u01a1 ch\u1ebf ch\u00ednh s\u00e1ch \u0111\u1ec3 g\u00f3p ph\u1ea7n c\u1ea3i thi\u1ec7n sinh k\u1ebf, n\u00e2ng cao thu nh\u1eadp cho ng\u01b0\u1eddi l\u00e0m ngh\u1ec1 r\u1eebng th\u00fac \u0111\u1ea9y ph\u00e1t tri\u1ec3n s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p \u1edf c\u00e1c HG\u0110 trong giai \u0111o\u1ea1n hi\u1ec7n nay.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> Thu nh\u1eadp h\u1ed9 gia \u0111\u00ecnh, qu\u1ea3n l\u00fd b\u1ea3o v\u1ec7 v\u00e0 ph\u00e1t tri\u1ec3n r\u1eebng, s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p<\/td>\n<\/tr>\n

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<\/a>Assessment the income of households which participanting in forestry production in the\u00a0 Northern Mountainous provinces<\/strong><\/p>\n

Households play a crucial role in the development of the forestry sector in Vietnam nowadays, however, the forestry production of households still reveals many limitations, especially in the midland of Northern mountainous provinces. This article has assessed that the main economic activities of households participating in forestry production are growing agricultural crops, livestock and forest and contracting for forest protection; Households rely on their own potential and capacity on finance, labor and specific production conditions for forestry production, only 37.4% of households have access to loans from banks for investment in forestry production, however, the loan level is still low, not enough to invest in forestry with a long rotation to for planting large timber. The efficiency of forestry production of other households is quite high. Households that grow Cinnamon in Yen Bai with a rotation of 10 – 12 years bring the highest economic profit of about 45 million VND\/ha per year. Income from forestry accounts for a relatively modest proportion with only about 13.8% of the total income, especially for households in the Northwest region (Son La, Lai Chau), the income from forestry is very low due to the absence of exploitation of production forests. Regarding the forestry production of households, there are many mechanisms and policies that are being implemented into practice that have had a very positive impact on households. But besides that, there are also limitations that have been pointed out, and at the same time, the authors have also given a number of solutions and suggestions on mechanisms and policies to contribute to enhancing livelihoods, improving income for forest workers in order to promote the development of forestry production of households in the current period.<\/p>\n

Keywords:<\/em><\/strong> Household income, SFM, forestry production<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/a>KH\u1ea2 N\u0102NG \u0110\u00c1P \u1ee8NG HI\u1ec6P \u0110\u1ecaNH TH\u01af\u01a0NG M\u1ea0I T\u1ef0 DO\u00a0LI\u00caN MINH CH\u00c2U \u00c2U – VI\u1ec6T NAM V\u1ec0 LAO \u0110\u1ed8NG\u00a0C\u1ee6A DOANH NGHI\u1ec6P CH\u1ebe BI\u1ebeN G\u1ed6 NH\u1ece V\u00c0 V\u1eeaA<\/p>\n

<\/a>Nguy\u1ec5n Ti\u1ebfn H\u1ea3i, Ho\u00e0ng Li\u00ean S\u01a1n, Nguy\u1ec5n Th\u1ecb Thu H\u00e0<\/p>\n

Trung t\u00e2m Nghi\u00ean c\u1ee9u Kinh t\u1ebf l\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Hi\u1ec7p \u0111\u1ecbnh Th\u01b0\u01a1ng m\u1ea1i t\u1ef1 do gi\u1eefa Li\u00ean minh ch\u00e2u \u00c2u – Vi\u1ec7t Nam (EVFTA) mang l\u1ea1i c\u01a1 h\u1ed9i l\u1edbn cho xu\u1ea5t kh\u1ea9u g\u1ed7 c\u1ee7a Vi\u1ec7t Nam. Tuy nhi\u00ean, \u0111\u1ec3 khai th\u00e1c c\u01a1 h\u1ed9i n\u00e0y, c\u00e1c doanh nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7 c\u1ea7n \u0111\u1ea3m b\u1ea3o c\u00e1c quy \u0111\u1ecbnh c\u1ee7a EVFTA v\u00e0 quy \u0111\u1ecbnh ph\u00e1p lu\u1eadt li\u00ean quan v\u1ec1 m\u00f4i tr\u01b0\u1eddng, x\u00e3 h\u1ed9i v\u00e0 lao \u0111\u1ed9ng. B\u00e1o c\u00e1o n\u00e0y \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng c\u00e1c quy \u0111\u1ecbnh v\u1ec1 lao \u0111\u1ed9ng c\u1ee7a doanh nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7 nh\u1ecf v\u00e0 v\u1eeba (sau \u0111\u00e2y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 doanh nghi\u1ec7p) tr\u00ean c\u01a1 s\u1edf nghi\u00ean c\u1ee9u t\u00e0i li\u1ec7u th\u1ee9 c\u1ea5p, ph\u1ecfng v\u1ea5n 45 \u0111\u1ea1i di\u1ec7n l\u00e3nh \u0111\u1ea1o v\u00e0 135 ng\u01b0\u1eddi lao \u0111\u1ed9ng c\u1ee7a c\u00e1c doanh nghi\u1ec7p \u1edf Tuy\u00ean Quang, Ngh\u1ec7 An v\u00e0 B\u00ecnh \u0110\u1ecbnh. K\u1ebft qu\u1ea3 cho th\u1ea5y s\u1ef1 h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng c\u1ee7a c\u00e1c doanh nghi\u1ec7p nh\u1ecf v\u00e0 si\u00eau nh\u1ecf v\u1ec1 c\u00e1c ch\u1ec9 s\u1ed1 li\u00ean quan \u0111\u1ebfn lao \u0111\u1ed9ng, nh\u01b0: i) T\u1ef1 do li\u00ean k\u1ebft v\u00e0 th\u01b0\u01a1ng l\u01b0\u1ee3ng t\u1eadp th\u1ec3 th\u00f4ng qua t\u1ed5 ch\u1ee9c C\u00f4ng \u0111o\u00e0n; ii) S\u1eed d\u1ee5ng lao \u0111\u1ed9ng tr\u1ebb em; iii) \u0110i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c cho ph\u1ee5 n\u1eef; iv) Th\u1eddi gian l\u00e0m vi\u1ec7c v\u00e0 tr\u1ea3 l\u01b0\u01a1ng th\u1ecfa \u0111\u00e1ng; v) \u0110i\u1ec1u ki\u1ec7n l\u00e0m vi\u1ec7c an to\u00e0n v\u00e0 \u0111\u1ea3m b\u1ea3o s\u1ee9c kh\u1ecfe; v\u00e0 vi) Quan h\u1ec7 lao \u0111\u1ed9ng. T\u1ef7 l\u1ec7 doanh nghi\u1ec7p nh\u1ecf v\u00e0 si\u00eau nh\u1ecf \u0111\u00e1p \u1ee9ng c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u00e1nh gi\u00e1 th\u01b0\u1eddng th\u1ea5p h\u01a1n t\u1ef7 l\u1ec7 doanh nghi\u1ec7p v\u1eeba v\u00e0 nh\u1ecf. Kh\u00f3 kh\u0103n ch\u1ee7 y\u1ebfu \u0111\u1ed1i v\u1edbi doanh nghi\u1ec7p trong vi\u1ec7c \u0111\u00e1p \u1ee9ng c\u00e1c quy \u0111\u1ecbnh l\u00e0 do nhi\u1ec1u quy \u0111\u1ecbnh ph\u00e1p lu\u1eadt, thi\u1ebfu h\u01b0\u1edbng d\u1eabn, hi\u1ec3u bi\u1ebft v\u1ec1 quy \u0111\u1ecbnh, t\u00e0i ch\u00ednh, nh\u00e2n l\u1ef1c, nh\u1eadn th\u1ee9c c\u1ee7a ng\u01b0\u1eddi lao \u0111\u1ed9ng, s\u1ef1 li\u00ean k\u1ebft v\u00e0 c\u01a1 quan \u0111\u1ea7u m\u1ed1i h\u1ed7 tr\u1ee3 doanh nghi\u1ec7p trong th\u1ef1c hi\u1ec7n.<\/p>\n

T\u1eeb kh\u00f3a:<\/em><\/strong> EVFTA, lao \u0111\u1ed9ng, doanh nghi\u1ec7p, ch\u1ebf bi\u1ebfn g\u1ed7<\/td>\n<\/tr>\n

\n

<\/a>Ability to meet the EU-Vietnam Free Trade Agreement on labor of small and medium-sized wood processing enterprises<\/strong><\/p>\n

The EU-Vietnam Free Trade Agreement (EVFTA) offers great opportunities for Vietnam’s timber exports. However, to exploit this opportunity, wood processing enterprises need toensure the provisions of EVFTA and relevant laws on environment, society and labor. This report assesses the ability of small and medium-sized wood processing enterprises to meet labor regulations based on secondary document research, interviews with representatives of 45 enterprises and 135 employees of enterprises in Tuyen Quang, Nghe An and Binh Dinh. The results show the limited ability of these enterprises, especially small and micro enterprises to respond on labor-related indicators, such as i) Freedom of association and collective bargaining through trade unions; ii) Use of child labour; iii) Workingconditions for women; iv) Working time and satisfactory pay; v) Safe and healthy working conditions; and vi) Industrial relations. The proportion of small and micro enterprises meeting the assessment indicators is usually lower than the proportion of small and medium enterprises. The main difficulties for enterprises in meeting regulations are many legal regulations, lack of guidance and understandable regulations, employee awareness, cooperation, finance, human resources and focal agency to support enterprises in implementation.<\/p>\n

Keywords:<\/em><\/strong> EVFTA, labour, enterprise, wood processing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 1 – 2023 1. Nghi\u00ean c\u1ee9u nh\u00e2n gi\u1ed1ng gia \u0111\u00ecnh c\u00e2y tr\u1ed9i Th\u00f4ng carib\u00ea (Pinus caribaea Morelet) t\u1eeb h\u1ea1t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nu\u00f4i c\u1ea5y m\u00f4 In vitro propagation of Pinus caribaea Morelet from seeds of plus tree family L\u01b0u Th\u1ecb Qu\u1ef3nh V\u0103n Thu Huy\u1ec1n Nguy\u1ec5n Anh D\u0169ng Ho\u00e0ng […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24,45],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2460"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=2460"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2460\/revisions"}],"predecessor-version":[{"id":2463,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/2460\/revisions\/2463"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=2460"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=2460"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=2460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}