{"id":1601,"date":"2018-07-23T11:13:02","date_gmt":"2018-07-23T04:13:02","guid":{"rendered":"http:\/\/vafs.gov.vn\/en\/?p=1601"},"modified":"2023-11-23T12:25:29","modified_gmt":"2023-11-23T05:25:29","slug":"vietnam-journal-of-forest-science-number-2-2018","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/2018\/07\/vietnam-journal-of-forest-science-number-2-2018\/","title":{"rendered":"Vietnam Journal of Forest Science Number 2-2018"},"content":{"rendered":"

\"Bia<\/a><\/p>\n

T\u1ea0P CH\u00cd KHOA H\u1eccC L\u00c2M NGHI\u1ec6P S\u1ed0 2<\/b> – <\/b>201<\/b>8<\/b><\/p>\n

\u00a0<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
1<\/td>\n\n

Ch\u1ecdn gi\u1ed1ng Tr\u00f4m (Sterculia foetida <\/i>L.) theo h\u01b0\u1edbng l\u1ea5y m\u1ee7 \u1edf v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung B\u1ed9<\/p>\n<\/td>\n

\n

Breeding Sterculia foetida<\/i> L. for gum purposes in dry land of South Central Vietnam<\/p>\n<\/td>\n

\n

Ph\u00f9ng V\u0103n Khen
\nPh\u00f9ng V\u0103n Khang
\nNguy\u1ec5n Tr\u1ecdng Nam<\/p>\n<\/td>\n

\n

3<\/p>\n<\/td>\n<\/tr>\n

2<\/td>\n\n

Nghi\u00ean c\u1ee9u c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n v\u00e0 gieo \u01b0\u01a1m\u00a0 S\u00e2m lai ch\u00e2u (Panax vietnamensis<\/i> var. fuscidiscus <\/i>Komatsu, Shu & Cai)<\/p>\n<\/td>\n

\n

Phenology growth stages and germination of Laichau ginseng (Panax vietnamensis<\/i> var. fuscidiscus<\/i> Komatsu, Shu & Cai)<\/p>\n<\/td>\n

\n

Tr\u01b0\u01a1ng Th\u1ecb Lan Anh
\nL\u00ea Ng\u1ecdc Tri\u1ec7u
\nNguy\u1ec5n Khoa Tr\u01b0\u1edfng\u00a0 Tr\u1ea7n Th\u1ecb Nhung
\nHo\u00e0ng Vi\u1ec7t H\u1eadu
\nNguy\u1ec5n V\u0103n Giang Nguy\u1ec5n Th\u1ecb B\u00edch Li\u00ean
\nN\u00f4ng V\u0103n Duy
\nTr\u1ea7n V\u0103n Ti\u1ebfn<\/p>\n<\/td>\n

\n

16<\/p>\n<\/td>\n<\/tr>\n

3<\/td>\n\n

Nghi\u00ean c\u1ee9u \u1ea3nh h\u01b0\u1edfng c\u1ee7a lo\u1ea1i m\u00f4i tr\u01b0\u1eddng c\u01a1 b\u1ea3n v\u00e0 c\u00e1c ch\u1ea5t \u0111i\u1ec1u h\u00f2a sinh tr\u01b0\u1edfng\u00a0 \u0111\u1ebfn kh\u1ea3 n\u0103ng nh\u00e2n t\u1ea1o ch\u1ed3i m\u1edbi s\u1ea1ch b\u1ec7nh ban \u0111\u1ea7u c\u1ee7a c\u00e2y Sa m\u1ed9c d\u1ea7u (Cunninghamia konishii\u00a0<\/i>Hayata)<\/p>\n<\/td>\n

\n

Efeects of environment types to the development of clean samples of Cunninghamia konishii <\/i>Hayata<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Th\u1ecb Thoa
\nH\u1ed3 Ng\u1ecdc S\u01a1n<\/p>\n<\/td>\n

\n

25<\/p>\n<\/td>\n<\/tr>\n

4<\/td>\n\n

\u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 t\u00e1i sinh c\u00e2y Xoan \u0111\u00e0o \u1edf m\u1ed9t s\u1ed1 t\u1ec9nh v\u00f9ng T\u00e2y B\u1eafc<\/p>\n<\/td>\n

\n

Structural and regenerative characteristics of Pegyum arboreum <\/i>Endl. species
\nin Northwest<\/p>\n<\/td>\n

\n

Ho\u00e0ng V\u0103n Th\u1eafng
\nCao V\u0103n L\u1ea1ng
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nH\u00e0 Quang Anh<\/p>\n<\/td>\n

\n

33<\/p>\n<\/td>\n<\/tr>\n

5<\/td>\n\n

Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m ph\u00e2n b\u1ed1 v\u00e0 t\u00e1i sinh t\u1ef1 nhi\u00ean c\u1ee7a lo\u00e0i Kh\u00f4i nhung (Ardisia silvestris <\/i>Pit.) t\u1ea1i khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean S\u01a1n Tr\u00e0, Th\u00e0nh ph\u1ed1 \u0110\u00e0 N\u1eb5ng<\/p>\n<\/td>\n

\n

Study on distribution
\nand regeneration characteristics of Ardisia silvestris<\/i> Pit.. in Son Tra nature reserve, Da Nang city<\/p>\n<\/td>\n

\n

L\u00ea Vi\u1ebft M\u1ea1nh
\nNguy\u1ec5n Th\u1ecb Kim Y\u1ebfn
\nTr\u1ea7n Ng\u1ecdc To\u00e0n<\/p>\n<\/td>\n

\n

43<\/p>\n<\/td>\n<\/tr>\n

6<\/td>\n\n

\u0110\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc c\u1ee7a nh\u00f3m r\u1eebng gi\u00e0u v\u00e0 r\u1eebng trung b\u00ecnh\u00a0 thu\u1ed9c ki\u1ec3u r\u1eebng k\u00edn th\u01b0\u1eddng xanh \u1ea9m nhi\u1ec7t \u0111\u1edbi t\u1ea1i Ban qu\u1ea3n l\u00fd r\u1eebng Nam Huoai, t\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/p>\n<\/td>\n

\n

Ecological characteristics of rich and medium forests in tropical moist evergreen closed forest type at Nam Huoai Forest Management Board, Lam Dong province<\/p>\n<\/td>\n

\n

Tr\u1ea7n Quang B\u1ea3o
\nNguy\u1ec5n M\u1ea1nh Ti\u1ebfn<\/p>\n<\/td>\n

\n

50<\/p>\n<\/td>\n<\/tr>\n

7<\/td>\n\n

Nghi\u00ean c\u1ee9u \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng lo\u00e0i Gi\u1ed5i nhung\u00a0 t\u1ea1i Kon H\u00e0 N\u1eebng, T\u00e2y Nguy\u00ean<\/p>\n<\/td>\n

\n

Study the growth characteristics of Paramichielia braianensis<\/i> Dandy in Kon Ha Nung, Tay Nguyen<\/p>\n<\/td>\n

\n

Tr\u1ea7n H\u1ed3ng S\u01a1n<\/p>\n<\/td>\n

\n

59<\/p>\n<\/td>\n<\/tr>\n

8<\/td>\n\n

M\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m t\u00e1i sinh d\u01b0\u1edbi t\u00e1n r\u1eebng k\u00edn th\u01b0\u1eddng xanh h\u1ed7n giao l\u00e1 r\u1ed9ng, l\u00e1 kim t\u1ea1i V\u01b0\u1eddn qu\u1ed1c gia Bidoup – N\u00fai B\u00e0, t\u1ec9nh
\nL\u00e2m \u0110\u1ed3ng<\/p>\n<\/td>\n

\n

Natural regeneration characteristics under the canopy of closed evergreen mixed broad, needle leaf forest types in Bidoup – Nui Ba National Park, Lam Dong province<\/p>\n<\/td>\n

\n

Tr\u1ea7n Th\u1ecb Thanh H\u01b0\u01a1ng
\nNguy\u1ec5n \u0110\u0103ng H\u1ed9i
\nTri\u1ec7u V\u0103n H\u00f9ng<\/p>\n<\/td>\n

\n

67<\/p>\n<\/td>\n<\/tr>\n

9<\/td>\n\n

\u1ea2nh h\u01b0\u1edfng c\u1ee7a qu\u1ea3n l\u00fd v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c v\u00e0 b\u00f3n ph\u00e2n \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 \u0111\u1ed9 ph\u00ec \u0111\u1ea5t r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n lai UP (Eucalyptus urophylla<\/i> \u00d7 E. pellita<\/i>)<\/p>\n<\/td>\n

\n

Effects of slash and litter management and fertilizer practices on growth and soil chemical properties
\nof Eucalyptus hybrid
\n(E. urophylla <\/i>\u00d7 E. pellita<\/i>)<\/p>\n<\/td>\n

\n

Nguy\u1ec5n Ti\u1ebfn Linh
\nV\u00f5 \u0110\u1ea1i H\u1ea3i
\nTr\u1ea7n L\u00e2m \u0110\u1ed3ng
\nHo\u00e0ng V\u0103n Th\u00e0nh
\nD\u01b0\u01a1ng Quang Trung
\nTr\u1ea7n Anh H\u1ea3i
\nHo\u00e0ng Th\u1ecb Nhung
\nTr\u1ea7n H\u1ed3ng V\u00e2n
\nNguy\u1ec5n Th\u1ecb Mai Qu\u1ef3nh<\/p>\n<\/td>\n

\n

75<\/p>\n<\/td>\n<\/tr>\n

10<\/td>\n\n

T\u0103ng tr\u01b0\u1edfng sinh kh\u1ed1i d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t c\u1ee7a r\u1eebng th\u1ee9 sinh l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh\u00a0 t\u1ea1i Kon H\u00e0 N\u1eebng, Gia Lai<\/p>\n<\/td>\n

\n

Belowground biomass increment of secondary evergreen broadleaf forests in Kon Ha Nung, Gia Lai province<\/p>\n<\/td>\n

\n

Tr\u1ea7n Ho\u00e0ng Qu\u00fd<\/p>\n<\/td>\n

\n

86<\/p>\n<\/td>\n<\/tr>\n

11<\/td>\n\n

Nghi\u00ean c\u1ee9u nu\u00f4i tr\u1ed3ng qu\u1ea3 th\u1ec3 \u0111\u1ec7m n\u1ea5m \u0110\u00f4ng tr\u00f9ng
\nh\u1ea1 th\u1ea3o b\u00f4ng tuy\u1ebft (Isaria tenuipes<\/i>) tr\u00ean gi\u00e1 th\u1ec3
\nnh\u00e2n t\u1ea1o<\/p>\n<\/td>\n

\n

Study on synnenmata production of snowflake Dongchunghacho (Isaria tenuipes<\/i>) on artificial substrates<\/p>\n<\/td>\n

\n

Ho\u00e0ng Qu\u1ed1c B\u1ea3o
\nL\u00ea Th\u1ecb Xu\u00e2n
\nPh\u1ea1m Quang Thu<\/p>\n<\/td>\n

\n

95<\/p>\n<\/td>\n<\/tr>\n

12<\/td>\n\n

Ph\u00f2ng tr\u1eeb b\u1ec7nh lo\u00e9t th\u00e2n do n\u1ea5m Pseudoplagiostoma eucalypti<\/i> tr\u00ean c\u00e2y b\u1ea1ch \u0111\u00e0n \u1edf giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m<\/p>\n<\/td>\n

\n

Control of Pseudoplagiostoma eucalypti<\/i> causing canker disease on Eucalyptus in nursery period<\/p>\n<\/td>\n

\n

Nguy\u1ec5n V\u0103n Nam
\nTr\u1ea7n Xu\u00e2n Hinh
\nNguy\u1ec5n Minh Ch\u00ed
\nD\u01b0\u01a1ng Xu\u00e2n Tu\u1ea5n<\/p>\n<\/td>\n

\n

103<\/p>\n<\/td>\n<\/tr>\n

13<\/td>\n\n

\u0110\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 \u0111\u1ea7u t\u01b0 kinh doanh r\u1eebng tr\u1ed3ng t\u1ea1i v\u00f9ng U Minh H\u1ea1, t\u1ec9nh C\u00e0 Mau<\/p>\n<\/td>\n

\n

Evaluation of investment efficiency in planting forest at U Minh Ha region, Ca Mau province<\/p>\n<\/td>\n

\n

Ng\u00f4 V\u0103n Ng\u1ecdc
\nKi\u1ec1u Tu\u1ea5n \u0110\u1ea1t
\nTr\u1ea7n Thanh Cao
\n\u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i
\nNguy\u1ec5n Trung Th\u00f4ng
\nTr\u1ea7n Qu\u1ed1c Kh\u00e1i<\/p>\n<\/td>\n

\n

111<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

CH\u1eccN GI\u1ed0NG TR\u00d4M (Sterculia foetida<\/i> L.) THEO H\u01af\u1edaNG L\u1ea4Y M\u1ee6 \u1ede V\u00d9NG KH\u00d4 H\u1ea0N NAM TRUNG B\u1ed8<\/p>\n

Ph\u00f9ng V\u0103n Khen, Ph\u00f9ng V\u0103n Khang, Nguy\u1ec5n Tr\u1ecdng Nam<\/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

Tr\u00f4m (Sterculia foetida<\/i> L.) l\u00e0 lo\u00e0i c\u00e2y ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean kh\u00e1 r\u1ed9ng, c\u00f3 nhi\u1ec1u chi, l\u00e0 gi\u1ed1ng c\u00f3 kh\u1ea3 n\u0103ng cho s\u1ea3n ph\u1ea9m m\u1ee7. M\u1ee5c ti\u00eau c\u1ee7a nghi\u00ean c\u1ee9u n\u00e0y l\u00e0 ch\u1ecdn \u0111\u01b0\u1ee3c gi\u1ed1ng Tr\u00f4m c\u00f3 n\u0103ng su\u1ea5t m\u1ee7 v\u01b0\u1ee3t \u00edt nh\u1ea5t 10% so v\u1edbi s\u1ea3n xu\u1ea5t hi\u1ec7n nay \u1edf v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung B\u1ed9. \u0110\u1ec3 \u0111\u1ea1t m\u1ee5c ti\u00eau, nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch ch\u1ecdn l\u1ecdc c\u00e2y tr\u1ed9i v\u00e0 kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf c\u1ee7a nh\u1eefng c\u00e2y tr\u1ed9i \u0111\u00e3 ch\u1ecdn. Th\u1eddi gian cho kh\u1ea3o nghi\u1ec7m h\u1eadu th\u1ebf l\u00e0 4 n\u0103m. C\u00e1c k\u1ebft qu\u1ea3 ch\u1ec9 ra r\u1eb1ng: (i) \u0110\u00e3 ch\u1ecdn \u0111\u01b0\u1ee3c 50 c\u00e2y m\u1eb9 t\u1eeb 11 xu\u1ea5t x\u1ee9 c\u1ee7a 4 v\u00f9ng sinh th\u00e1i \u1edf ph\u00eda Nam, trong \u0111\u00f3 c\u00e2y m\u1eb9 c\u1ee7a xu\u1ea5t x\u1ee9 Ninh Thu\u1eadn v\u00e0 B\u00ecnh Thu\u1eadn l\u00e0 v\u01b0\u1ee3t tr\u1ed9i ho\u00e0n to\u00e0n v\u1ec1 ch\u1ec9 ti\u00eau l\u01b0\u1ee3ng m\u1ee7. (ii) X\u00e1c \u0111\u1ecbnh c\u00f3 5 xu\u1ea5t x\u1ee9 x\u1ebfp h\u1ea1ng cao nh\u1ea5t, \u0111\u1ea1t tr\u1ed9i c\u1ea3 v\u1ec1 ch\u1ec9 ti\u00eau l\u01b0\u1ee3ng m\u1ee7 v\u00e0 c\u00e1c ch\u1ec9 ti\u00eau k\u00edch th\u01b0\u1edbc l\u00e0: Gia Lai, Ki\u00ean Giang, \u0110\u1ed3ng Nai, Ninh Thu\u1eadn v\u00e0 B\u00ecnh Thu\u1eadn. (iii) X\u00e1c \u0111\u1ecbnh c\u00f3 18 gia \u0111\u00ecnh \u0111\u1ea1t tr\u1ed9i v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau k\u00edch th\u01b0\u1edbc, c\u00f3 8 gia \u0111\u00ecnh \u0111\u1ea1t tr\u1ed9i v\u1ec1 ri\u00eang ch\u1ec9 ti\u00eau l\u01b0\u1ee3ng m\u1ee7 v\u00e0 ch\u1ec9 c\u00f3 3 gia \u0111\u00ecnh \u0111\u1ea1t tr\u1ed9i c\u1ea3 v\u1ec1 ch\u1ec9 ti\u00eau k\u00edch th\u01b0\u1edbc l\u1eabn ch\u1ec9 ti\u00eau l\u01b0\u1ee3ng m\u1ee7. C\u00e1c gia \u0111\u00ecnh \u0111\u01b0\u1ee3c ch\u1ecdn cu\u1ed1i c\u00f9ng l\u00e0 NT18, BT04 v\u00e0 BT01.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>Ch\u1ecdn gi\u1ed1ng Tr\u00f4m, c\u00e2y Tr\u00f4m, m\u1ee7 Tr\u00f4m, Nam Trung B\u1ed9, Sterculia foetida<\/i><\/td>\n<\/tr>\n

Breeding Sterculia foetida<\/i> L. for gum purposes in dry land of South Central Vietnam<\/strong><\/p>\n

Sterculia foetida<\/i> L. is a widely distributed species, with many varieties, capable of producing latex products. The objective of this study was to select Sterculia foetida<\/i> L. with a yield of at least 10% compared with that of today in the dry South Central. To achieve this goal, the research was done by selecting the dominant trees and testing the posteriority of the selected trees. The time for posterity testing is 4 years. The results indicate that: (i) 50 mothers were selected from 11 provenances of 4 ecological zones in the South, of which the mother plants of Ninh Thuan and Binh Thuan were superior to the norm pus. (ii) Identify the top 5 provenances, which are superior in terms of pungency and size criteria: Gia Lai, Kien Giang, Dong Nai, Ninh Thuan and Binh Thuan. (iii) Identify 18 families that excel in size; 8 families have their own size and only 3 families in size and latex. The last selected families are NT18, BT04 and BT01. <\/i><\/b><\/p>\n

Keywords: <\/i><\/b>Selecting foret trees, Sterculia foetida<\/i> gum, South Central Vietnam, Sterculia foetida<\/i><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U C\u00c1C GIAI \u0110O\u1ea0N PH\u00c1T TRI\u1ec2N V\u00c0 GIEO \u01af\u01a0M\u00a0S\u00c2M LAI CH\u00c2U (Panax vietnamensis<\/i> var. fuscidiscus<\/i> Komatsu, Shu & Cai)<\/p>\n

Tr\u01b0\u01a1ng Th\u1ecb Lan Anh1<\/sup>, L\u00ea Ng\u1ecdc Tri\u1ec7u, Nguy\u1ec5n Khoa Tr\u01b0\u1edfng1<\/sup>
\nTr\u1ea7n Th\u1ecb Nhung1<\/sup>, Ho\u00e0ng Vi\u1ec7t H\u1eadu1<\/sup>, Nguy\u1ec5n V\u0103n Giang1
\n<\/sup>Nguy\u1ec5n Th\u1ecb B\u00edch Li\u00ean1<\/sup>, N\u00f4ng V\u0103n Duy2<\/sup>, Tr\u1ea7n V\u0103n Ti\u1ebfn1*<\/sup><\/p>\n

1<\/sup> \u0110\u1ea1i h\u1ecdc \u0110\u00e0 L\u1ea1t
\n2 <\/sup>Vi\u1ec7n Nghi\u00ean c\u1ee9u Khoa h\u1ecdc T\u00e2y Nguy\u00ean
\n1*: Ch\u1ecbu tr\u00e1ch nhi\u1ec7m ch\u00ednh<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

S\u00e2m lai ch\u00e2u <\/i>(Panax<\/i> vietnamensis<\/i> var. fuscidiscus<\/i> Komatsu, Shu & Cai) <\/strong>l\u00e0 lo\u00e0i c\u00e2y d\u01b0\u1ee3c li\u1ec7u c\u00f3 gi\u00e1 tr\u1ecb cao trong vi\u1ec7c ch\u1eefa b\u1ec7nh c\u0169ng nh\u01b0 n\u00e2ng cao th\u1ec3 tr\u1ea1ng cho ng\u01b0\u1eddi gi\u00e0. S\u00e2m lai ch\u00e2u \u0111\u01b0\u1ee3c ghi nh\u1eadn l\u00e0 lo\u00e0i c\u00f3 khu ph\u00e2n b\u1ed1 h\u1eb9p v\u00e0 \u0111ang b\u1ecb \u0111e d\u1ecda nghi\u1ec7m tr\u1ecdng. Tr\u01b0\u1edbc ti\u00ean c\u1ea7n ph\u1ea3i \u0111i\u1ec1u tra kh\u1ea3o s\u00e1t v\u1ec1 c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n c\u1ea7n thi\u1ebft l\u00e0m c\u01a1 s\u1edf khoa h\u1ecdc cho vi\u1ec7c nh\u00e2n gi\u1ed1ng v\u00e0 g\u00e2y tr\u1ed3ng ph\u00e1t tri\u1ec3n. Qua k\u1ebft qu\u1ea3 kh\u1ea3o s\u00e1t cho th\u1ea5y c\u00f3 4 giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n c\u00f3 \u00fd ngh\u0129a \u0111\u00f3 l\u00e0 giai \u0111o\u1ea1n n\u1ea3y m\u1ea7m, giai \u0111o\u1ea1n ra hoa, ph\u00e1t tri\u1ec3n th\u00e0nh qu\u1ea3 v\u00e0 ch\u00edn. Th\u1eddi gian ra hoa b\u1eaft \u0111\u1ea7u t\u1eeb cu\u1ed1i th\u00e1ng 3 \u0111\u1ebfn \u0111\u1ea7u th\u00e1ng 5 v\u00e0 th\u1eddi gian qu\u1ea3 ch\u00edn k\u00e9o d\u00e0i t\u1eeb th\u00e1ng 6 \u0111\u1ebfn th\u00e1ng 9. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 n\u1ea3y m\u1ea7m cho th\u1ea5y kh\u1ea3 n\u0103ng n\u1ea3y m\u1ea7m t\u1ed1t nh\u1ea5t l\u00e0 70% khi x\u1eed l\u00fd GA3<\/sub> 700 ppm trong th\u1eddi 24h, th\u1eddi gian n\u1ea3y m\u1ea7m t\u1eeb 75-90 ng\u00e0y. K\u1ebft qu\u1ea3 ch\u1ec9 ra c\u00e1c giai \u0111o\u1ea1n ph\u00e1t tri\u1ec3n c\u1ee7a S\u00e2m lai ch\u00e2u l\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft gi\u00fap cho vi\u1ec7c x\u00e2y d\u1ef1ng chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o t\u1ed3n c\u0169ng nh\u01b0 s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 t\u00e0i nguy\u00ean d\u01b0\u1ee3c li\u1ec7u qu\u00fd hi\u1ebfm \u1edf
\nVi\u1ec7t Nam.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>N\u1ea3y m\u1ea7m, S\u00e2m lai ch\u00e2u, v\u1eadt h\u1eadu h\u1ecdc<\/p>\n

 <\/td>\n<\/tr>\n

Phenology growth stages and germination of Laichau ginseng (Panax<\/i> vietnamensis<\/i> var. fuscidiscus<\/i> Komatsu, Shu & Cai)<\/strong><\/p>\n

Laichau ginseng (Panax<\/i> vietnamensis<\/i> var. fuscidiscus<\/i> Komatsu, Shu & Cai) is highly regarded medicines in Vietnam for various diseases and tonic drugs for the elderly. This species is considered to be endangered and its distribution is limited. Therefore it need urgent to phonological growth stages investigate, which is important to establish technique propagation and cultivation. Four principal growth stages for germination, bud development, root formation and inflorescence, flowering, fruiting, ripening were obtained. Flowering was observed in the end of March to the end of May; Maturity fruit in the beginning of May to the end of September; Rip fruits from July to September. The highest germination rate was observed at 70% within 75-90 days when seeds were treated by soaking with concentrated GA3<\/sub>700 ppm for 24h. Catalogue the data of Phenology growth stages of Laichau ginseng are essential when developing management\u2019s strategies for use in the conservation and sustainable utilization of the researched medicinal plants within Vietnam.<\/p>\n

Keywords: <\/i><\/b>Germination, Laichau ginseng, phenology<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u1ea2NH H\u01af\u1edeNG C\u1ee6A LO\u1ea0I M\u00d4I TR\u01af\u1edcNG C\u01a0 B\u1ea2N V\u00c0 C\u00c1C CH\u1ea4T \u0110I\u1ec0U H\u00d2A SINH TR\u01af\u1edeNG \u0110\u1ebeN KH\u1ea2 N\u0102NG NH\u00c2N T\u1ea0O CH\u1ed2I M\u1edaI S\u1ea0CH B\u1ec6NH BAN \u0110\u1ea6U C\u1ee6A C\u00c2Y SA M\u1ed8C D\u1ea6U (Cunninghamia konishii<\/i>\u00a0Hayata)<\/p>\n

Nguy\u1ec5n Th\u1ecb Thoa, H\u1ed3 Ng\u1ecdc S\u01a1n<\/p>\n

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

Sa m\u1ed9c d\u1ea7u (Cuninghamia konishii <\/i>Hayata) l\u00e0 m\u1ed9t lo\u00e0i th\u1ef1c v\u1eadt qu\u00fd, hi\u1ebfm, kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ef1 nhi\u00ean r\u1ea5t k\u00e9m, v\u00ec v\u1eady \u1ee9ng d\u1ee5ng nu\u00f4i c\u1ea5y m\u00f4 t\u1ebf b\u00e0o trong b\u1ea3o t\u1ed3n v\u00e0 nh\u00e2n gi\u1ed1ng th\u1ef1c s\u1ef1 mang l\u1ea1i hi\u1ec7u qu\u1ea3. Trong \u0111\u00f3 vi\u1ec7c t\u1ea1o ra nh\u1eefng c\u00e2y con s\u1ea1ch b\u1ec7nh ban \u0111\u1ea7u l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. C\u00f3 3 lo\u1ea1i m\u00f4i tr\u01b0\u1eddng n\u1ec1n ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0: MS, B5 v\u00e0 WPM, k\u1ebft qu\u1ea3 cho th\u1ea5y m\u00f4i tr\u01b0\u1eddng MS th\u00edch h\u1ee3p nh\u1ea5t cho t\u00e1i sinh ch\u1ed3i Sa m\u1ed9c d\u1ea7u v\u1edbi t\u1ef7 l\u1ec7 m\u1eabu t\u00e1i sinh cao nh\u1ea5t \u0111\u1ea1t 77,78%, ch\u1ed3i m\u1eadp v\u00e0 xanh. C\u1ea3 ba ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng BAP, Kinetin v\u00e0 GA3 \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng t\u1edbi kh\u1ea3 n\u0103ng t\u00e1i sinh ch\u1ed3i c\u00e2y Sa m\u1ed9c d\u1ea7u, v\u00e0 \u0111\u1ec1u c\u00f3 t\u00e1c d\u1ee5ng l\u00e0m t\u0103ng t\u1ef7 l\u1ec7 t\u00e1i sinh, trong \u0111\u00f3 ch\u1ea5t BAP c\u00f3 t\u1ef7 l\u1ec7 m\u1eabu t\u00e1i sinh cao h\u01a1n so v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng t\u01b0\u01a1ng \u1ee9ng c\u00f3 b\u1ed5 sung Kinetin ho\u1eb7c GA3 \u1edf c\u00f9ng n\u1ed3ng \u0111\u1ed9. N\u01b0\u1edbc d\u1eeba cung c\u1ea5p ngu\u1ed3n \u0111\u1ea1m v\u00e0 cacbohydrat t\u1ea1o ngu\u1ed3n dinh d\u01b0\u1ee1ng h\u1eefu c\u01a1 cho ch\u1ed3i ph\u00e1t tri\u1ec3n v\u00e0 v\u1edbi h\u00e0m l\u01b0\u1ee3ng 150 ml\/l l\u00e0 th\u00edch h\u1ee3p cho s\u1ef1 t\u00e1i sinh ch\u1ed3i Sa m\u1ed9c d\u1ea7u.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>M\u00f4i tr\u01b0\u1eddng n\u1ec1n, k\u00edch th\u00edch sinh tr\u01b0\u1edfng, t\u00e1i sinh ch\u1ed3i, s\u1ea1ch b\u1ec7nh, Sa m\u1ed9c d\u1ea7u<\/p>\n

 <\/td>\n<\/tr>\n

Efeects of environment types to the development of clean samples of Cunninghamia konishii<\/i> Hayata<\/strong><\/p>\n

Cuninghamia konishii <\/i>Hayatais a valuable genetic resource but its natural regeneration is bad so that tissue culture to create disease free seedlings is very important. Among three popular background environments used in tissue culture of MS, B5 and WPM, study results shown that MS is the most suitable for shoot regeneration with highest regenerated samples of 77.78%. Shoots are fat and green. All three growth stimulants of BAP, Kinetin and GA3 increased the shoot regeneration of Cuninghamia konishii <\/i>Hayata, of which BAP produced the higher rate of shoot regeneration than that of Kinetin or GA3 at the same concentraton. Coconut water at 150ml\/l is the most suitble to provide protein and cacbohydrate to supply organic nutrient sources for shoot growth.<\/p>\n

Keywords: <\/i><\/b>Backgroud environment, growth stimulation, shoot regeneration, disease free, Cuninghamia konishii<\/i> Hayata<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1eb6C \u0110I\u1ec2M C\u1ea4U TR\u00daC V\u00c0 T\u00c1I SINH C\u00c2Y XOAN \u0110\u00c0O\u00a0\u1ede M\u1ed8T S\u1ed0 T\u1ec8NH V\u00d9NG T\u00c2Y B\u1eaeC<\/p>\n

Ho\u00e0ng V\u0103n Th\u1eafng1<\/sup>, Cao V\u0103n L\u1ea1ng1<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh2<\/sup>, H\u00e0 Quang Anh3<\/sup><\/p>\n

1 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\n3Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac v\u00e0 t\u00e1i sinh c\u1ee7a c\u00e2y Xoan \u0111\u00e0o \u1edf c\u00e1c t\u1ec9nh H\u00f2a B\u00ecnh v\u00e0 S\u01a1n La cho th\u1ea5y, Xoan \u0111\u00e0o c\u00f3 ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng t\u1ef1 nhi\u00ean t\u1eeb IIA, IIB \u0111\u1ebfn IIIA2 v\u00e0 IIIA3. Trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng n\u00e0y, m\u1eadt \u0111\u1ed9 trung b\u00ecnh c\u1ee7a c\u00e2y Xoan \u0111\u00e0o tr\u01b0\u1edfng th\u00e0nh t\u1eeb 1 \u0111\u1ebfn 33 c\u00e2y tr\u00ean 1 ha (trung b\u00ecnh l\u00e0 8,7 c\u00e2y\/ha), t\u01b0\u01a1ng \u1ee9ng v\u1edbi ti\u1ebft di\u1ec7n ngang v\u00e0 tr\u1eef l\u01b0\u1ee3ng Xoan \u0111\u00e0o trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng n\u00e0y dao \u0111\u1ed9ng trong kho\u1ea3ng G = 0,3-1,7 m2<\/sup>\/ha v\u00e0 M = 2,0-11,7 m3<\/sup>\/ha. Xoan \u0111\u00e0o c\u00f3 \u00fd ngh\u0129a v\u1ec1 m\u1eb7t sinh th\u00e1i trong c\u00e1c tr\u1ea1ng th\u00e1i IIB v\u00e0 IIIA3 \u1edf H\u00f2a B\u00ecnh v\u1edbi ch\u1ec9 s\u1ed1 IVI = 6,1-7,4%. T\u1ea7ng c\u00e2y cao thu\u1ed9c c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng c\u00f3 Xoan \u0111\u00e0o ph\u00e2n b\u1ed1 \u1edf khu v\u1ef1c nghi\u00ean c\u1ee9u \u0111\u00e3 h\u00ecnh th\u00e0nh 2 nh\u00f3m \u01b0u h\u1ee3p kh\u00e1c nhau, trong \u0111\u00f3 ch\u1ec9 c\u00f3 1 \u01b0u h\u1ee3p c\u00f3 m\u1eb7t c\u1ee7a lo\u00e0i Xoan \u0111\u00e0o. C\u00e2y t\u00e1i sinh Xoan \u0111\u00e0o trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng \u1edf 2 t\u1ec9nh H\u00f2a B\u00ecnh v\u00e0 S\u01a1n La dao \u0111\u1ed9ng t\u1eeb 93-126 c\u00e2y\/ha, trong \u0111\u00f3 100% s\u1ed1 c\u00e2y Xoan \u0111\u00e0o t\u00e1i sinh c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb h\u1ea1t v\u00e0 ph\u1ea7n l\u1edbn \u0111\u1ea1t ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t. C\u00e2y Xoan \u0111\u00e0o t\u00e1i sinh c\u00f3 tri\u1ec3n v\u1ecdng trong c\u00e1c tr\u1ea1ng th\u00e1i r\u1eebng \u1edf 2 t\u1ec9nh nghi\u00ean c\u1ee9u ch\u1ec9 \u0111\u1ea1t 1,01-1,37% so v\u1edbi t\u1ed5ng s\u1ed1 c\u00e2y t\u00e1i sinh tr\u00ean 1 ha. S\u1ed1 lo\u00e0i c\u00e2y t\u00e1i sinh tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh lo\u00e0i dao \u0111\u1ed9ng t\u1eeb 3-13 lo\u00e0i. Xoan \u0111\u00e0o t\u00e1i sinh tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh v\u1edbi h\u1ec7 s\u1ed1 t\u1eeb 5,56-6,06%. C\u00e2y t\u00e1i sinh Xoan \u0111\u00e0o \u1edf tr\u1ea1ng th\u00e1i r\u1eebng trong khu v\u1ef1c nghi\u00ean c\u1ee9u b\u1ecb \u0111\u00e0o th\u1ea3i r\u1ea5t m\u1ea1nh theo c\u00e1c c\u1ea5p chi\u1ec1u cao, gi\u1ea3m d\u1ea7n t\u1eeb 1296 c\u00e2y\/ha \u1edf c\u1ea5p chi\u1ec1u cao nh\u1ecf h\u01a1n 1m xu\u1ed1ng c\u00f2n 33 c\u00e2y\/ha \u1edf c\u1ea5p chi\u1ec1u cao l\u1edbn h\u01a1n 3 m.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>C\u1ea5u tr\u00fac, t\u00e1i sinh, T\u00e2y B\u1eafc, Xoan \u0111\u00e0o<\/p>\n

 <\/td>\n<\/tr>\n

Structural and regenerative characteristics of Pegyum arboreum<\/i> Endl. species in Northwest<\/strong><\/p>\n

Research on structural and regenerative characteristics of Prunus arborea<\/i> was conducted in Hoa Binh and Son La provinces, Vietnam. The results indicated that P. arborea<\/i> has natural distributions in the forest status of IIA, IIB, IIIA2, and IIIA3. The tree (stems with diameter at breast height >6 cm) density of P. arborea<\/i> ranged from 1 to 33 stems ha-1<\/sup> (mean of 8.7 stems ha-1<\/sup>), corresponding to the base area is 0.3-1.7 square metersha-1<\/sup> and yeild is 2.0-11.7 cubic meters ha-1<\/sup>. In Hoa Binh province, P. arborea<\/i> has Importance Value Index (IVI) of 6.1-7.4% in forest status of IIB and IIIA3. In upper forest canopy, there were two groups of dominance species with only one group having appearance of P. arborea<\/i>. Seedling density of P. arborea<\/i> in both Hoa Binh and Son La provinces ranged from 93 to 126 stems ha-1<\/sup> and all seedlings regenerated from seeds. Potential seedlings, which can grow well to recruit to saplings, accounted for 1.01-1.37% in both provinces. The number of seedling species included in formula of species composition ranged from 3 to 13. In which, the index of P. arborea<\/i> was 5.56-6.06%. Seedling density of P. arborea<\/i> changed dramatically from 1,296 stems ha-1<\/sup> in <1 m tall class to 33 stems ha-1<\/sup> in >3 m tall class.<\/p>\n

Keywords: <\/i><\/b>Northwest, Pygeum arboreum<\/i> Endl., regeneration, structure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M PH\u00c2N B\u1ed0 V\u00c0 T\u00c1I SINH\u00a0T\u1ef0 NHI\u00caN C\u1ee6A LO\u00c0I KH\u00d4I NHUNG (Ardisia silvestris <\/i>Pit.) T\u1ea0I KHU B\u1ea2O T\u1ed2N THI\u00caN NHI\u00caN S\u01a0N TR\u00c0, TH\u00c0NH PH\u1ed0 \u0110\u00c0 N\u1eb4NG<\/p>\n

L\u00ea Vi\u1ebft M\u1ea1nh1<\/sup>, Nguy\u1ec5n Th\u1ecb Kim Y\u1ebfn2<\/sup>, Tr\u1ea7n Ng\u1ecdc To\u00e0n3<\/sup><\/p>\n

1<\/sup> <\/b>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc S\u01b0 Ph\u1ea1m – \u0110\u1ea1i h\u1ecdc \u0110\u00e0 N\u1eb5ng
\n2 <\/b><\/sup>V\u0103n ph\u00f2ng h\u1ee3p t\u00e1c gi\u1eefa H\u1ed9i \u0111\u1ed9ng v\u1eadt h\u1ecdc Frankfurt v\u00e0 khoa Sinh – M\u00f4i tr\u01b0\u1eddng,
\n\u0110H S\u01b0 ph\u1ea1m \u0110\u00e0 N\u1eb5ng
\n3 <\/b><\/sup>Trung t\u00e2m B\u1ea3o t\u1ed3n \u0110a d\u1ea1ng sinh h\u1ecdc N\u01b0\u1edbc Vi\u1ec7t Xanh (GreenViet)<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

C\u00e2y Kh\u00f4i nhung l\u00e0 lo\u00e0i c\u00e2y thu\u1ed1c \u0111\u01b0\u1ee3c x\u1ebfp trong s\u00e1ch \u0111\u1ecf c\u1ee7a Vi\u1ec7t Nam (2007) v\u1edbi m\u1ee9c \u0111\u1ed9 s\u1ebd nguy c\u1ea5p. B\u00e0i b\u00e1o nh\u1eb1m m\u1ee5c \u0111\u00edch cung c\u1ea5p th\u00f4ng tin khoa h\u1ecdc v\u1ec1 hi\u1ec7n tr\u1ea1ng, m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i, t\u00e1i sinh t\u1ef1 nhi\u00ean c\u1ee7a c\u00e2y Kh\u00f4i nhung t\u1ea1i khu B\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean (KBTTN) S\u01a1n Tr\u00e0, th\u00e0nh ph\u1ed1 \u0110\u00e0 N\u1eb5ng. C\u00e2y Kh\u00f4i nhung ph\u00e2n b\u1ed1 \u1edf nh\u1eefng v\u00f9ng \u0111\u1ea5t \u1ea9m \u01b0\u1edbt, d\u01b0\u1edbi t\u00e1n r\u1eebng \u0111\u1ed9 cao t\u1eeb 467-540 m, n\u1edf hoa v\u00e0o th\u00e1ng 3, qu\u1ea3 t\u1eeb th\u00e1ng 8 \u0111\u1ebfn th\u00e1ng 3 n\u0103m sau. T\u1ed5 th\u00e0nh t\u1ea7ng c\u00e2y cao c\u1ee7a l\u00e2m ph\u1ea7n c\u00f3 c\u00e2y Kh\u00f4i nhung ph\u00e2n b\u1ed1 kh\u00e1 \u0111a d\u1ea1ng g\u1ed3m c\u00e1c lo\u00e0i \u01b0u th\u1ebf l\u00e0 Ch\u1eb9o b\u00f4ng (Engelhardia spicata<\/i> Lesch. ex Bl. var. spicata<\/i>.) l\u00e0 lo\u00e0i \u01b0u th\u1ebf cao nh\u1ea5t v\u1edbi gi\u00e1 tr\u1ecb IVI cao nh\u1ea5t l\u00e0 38,925%, C\u00e0 \u0111u\u1ed1i Ching (Cryptocarya chingii <\/i>Ching) v\u1edbi gi\u00e1 tr\u1ecb IVI l\u00e0 14,04%. Ch\u1ec9 s\u1ed1 trung b\u00ecnh c\u1ee7a Shannon v\u00e0 Simpson l\u1ea7n l\u01b0\u1ee3t l\u00e0 2,71 v\u00e0 0,92. C\u00e2y Kh\u00f4i nhung c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1eeb c\u1ea3 h\u1ea1t v\u00e0 ch\u1ed3i v\u1edbi t\u1ef7 l\u1ec7 82%, t\u00e1i sinh h\u1ea1t chi\u1ebfm t\u1ef7 l\u1ec7 18%. Ch\u1ea5t l\u01b0\u1ee3ng c\u00e2y t\u00e1i sinh h\u1ea7u h\u1ebft t\u1ed1t v\u1edbi t\u1ef7 l\u1ec7 64%. M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh ch\u1ec9 t\u1eeb 183,33 c\u00e2y\/ha, h\u01a1n n\u1eefa c\u00e2y t\u00e1i sinh l\u1ea1i ph\u00e2n b\u1ed1 kh\u00f4ng \u0111\u1ec1u d\u1eabn \u0111\u1ebfn s\u1ef1 thi\u1ebfu h\u1ee5t v\u1ec1 l\u01b0\u1ee3ng c\u00e2y Kh\u00f4i nhung t\u00e1i sinh. V\u00ec th\u1ebf c\u1ea7n c\u00f3 c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o t\u1ed3n v\u00e0 x\u00fac ti\u1ebfn t\u00e1i sinh Kh\u00f4i nhung \u1edf KBTTN S\u01a1n Tr\u00e0.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>C\u00e2y Kh\u00f4i nhung, \u0111\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc, khu b\u1ea3o t\u1ed3n thi\u00ean nhi\u00ean S\u01a1n Tr\u00e0<\/p>\n

 <\/td>\n<\/tr>\n

Study on distribution and regeneration characteristics of Ardisia silvestris \u00a0<\/i>Pit.<\/i> in Son Tra nature reserve, Da Nang city<\/strong><\/p>\n

Ardisia silvestris <\/i>Pit is listed in the National Red Data Book of Viet Nam (Level V). This research airm to provide scientific information on the current status, biological characteristics, natural regeneration of Ardisia silvestris<\/i> Pit at Son Tra nature reserve, Da Nang city. This species was distributed in humid areas with the middle elevation range from 467-540 m, flower bloom in March, fruit in August to March of next year. Engelhardia spicata<\/i> Lesch. ex Bl. var. spicata.<\/i> is the highest dominant species with 38.925% in canopy layer, Cryptocarya chingii <\/i>Ching with 14.04%. <\/i>Tree species diversity of canopy layer with an average of Shannon index (H) and Simpson index were 2.71, 0.92 respectively. Ardisia silvestris<\/i> Pit was regenerated from both of seed and bud. Buds regeneration was 82% of total, seed regeneration accounted for 18%. The quality of trees regeneration was good at 64% of total. The density of regenerated Ardisia silvestris<\/i> Pit population was 183.33 trees\/ha. The type of trees regeneration distribution was non-homogeneous distribution, that lead to the lacking of the source of Ardisia silvestris<\/i> Pit regeneration. Therefore, it is necessary to have solutions to preserve and promote the regeneration of Ardisia silvestris<\/i> Pit in Son Tra Nature reserve.<\/p>\n

Keywords: <\/i><\/b>Ardisia silvestris <\/i>Pit., biological characteristic, Son Tra nature reserve<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u1eb6C \u0110I\u1ec2M L\u00c2M H\u1eccC C\u1ee6A NH\u00d3M R\u1eeaNG GI\u00c0U V\u00c0 R\u1eeaNG TRUNG B\u00ccNH THU\u1ed8C KI\u1ec2U R\u1eeaNG K\u00cdN TH\u01af\u1edcNG XANH \u1ea8M NHI\u1ec6T \u0110\u1edaI\u00a0T\u1ea0I BAN QU\u1ea2N L\u00dd R\u1eeaNG NAM HUOAI, T\u1ec8NH L\u00c2M \u0110\u1ed2NG<\/p>\n

Tr\u1ea7n Quang B\u1ea3o1<\/sup>, Nguy\u1ec5n M\u1ea1nh Ti\u1ebfn2<\/sup><\/p>\n

1<\/sup>Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p
\n2<\/sup>Chi c\u1ee5c Ki\u1ec3m L\u00e2m t\u1ec9nh L\u00e2m \u0110\u1ed3ng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

B\u00e0i b\u00e1o tr\u00ecnh b\u00e0y k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch k\u1ebft c\u1ea5u lo\u00e0i c\u00e2y g\u1ed7, c\u1ea5u tr\u00fac, t\u00ecnh tr\u1ea1ng t\u00e1i sinh v\u00e0 \u0111a d\u1ea1ng loa\u0300i c\u00e2y g\u00f4\u0303 c\u1ee7a hai nh\u00f3m r\u1eebng gi\u00e0u v\u00e0 r\u1eebng trung b\u00ecnh thu\u1ed9c r\u1eebng k\u00edn th\u01b0\u1eddng xanh \u1ea9m nhi\u1ec7t \u0111\u1edbi \u1edf BQLR Nam Huoai c\u1ee7a t\u1ec9nh L\u00e2m \u0110\u1ed3ng. S\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp tr\u00ean 10 \u00f4 ti\u00eau chu\u1ea9n c\u00f3 di\u1ec7n t\u00edch 2500 m2<\/sup> (50 m \u00b4
\n50 m). Tr\u00ean m\u1ed7i \u00f4 ti\u00eau chu\u1ea9n, \u0111i\u1ec1u tra c\u00e1c ch\u1ec9 ti\u00eau: th\u00e0nh ph\u1ea7n lo\u00e0i c\u00e2y, \u0111\u01b0\u1eddng k\u00ednh th\u00e2n c\u00e2y ngang ng\u1ef1c, chi\u1ec1u cao to\u00e0n th\u00e2n, chi\u1ec1u cao d\u01b0\u1edbi c\u00e0nh; \u0111\u01b0\u1eddng k\u00ednh t\u00e1n c\u00e2y. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch s\u1ed1 li\u1ec7u cho th\u1ea5y, t\u1ed5ng s\u1ed1 lo\u00e0i c\u00e2y g\u1ed7 \u1edf nh\u00f3m r\u1eebng trung b\u00ecnh v\u00e0 r\u1eebng gi\u00e0u l\u00e0 53 v\u00e0 46 lo\u00e0i c\u00e2y g\u1ed7, trong \u0111\u00f3 k\u1ebft c\u1ea5u lo\u00e0i c\u00e2y g\u1ed7 trung b\u00ecnh c\u1ee7a 8 lo\u00e0i c\u00e2y g\u1ed7 \u01b0u th\u1ebf v\u00e0 \u0111\u1ed3ng \u01b0u th\u1ebf l\u00e0 69,4% \u1edf r\u1eebng trung b\u00ecnh v\u00e0 \u1edf r\u1eebng gi\u00e0u l\u00e0 69,5%. Ph\u00e2n b\u1ed1 N\/D c\u1ee7a nh\u00f3m r\u1eebng trung b\u00ecnh c\u00f3 d\u1ea1ng m\u1ed9t \u0111\u1ec9nh l\u1ec7ch tr\u00e1i v\u00e0 d\u1ea1ng gi\u1ea3m theo h\u00ecnh ch\u1eef \u201cJ\u201d \u0111\u1ed1i v\u1edbi nh\u00f3m r\u1eebng gi\u00e0u. T\u00e1i sinh t\u1ef1 nhi\u00ean c\u1ee7a nh\u00f3m r\u1eebng trung b\u00ecnh v\u00e0 nh\u00f3m r\u1eebng gi\u00e0u di\u1ec5n ra li\u00ean t\u1ee5c theo th\u1eddi gian. Kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn v\u1ec1 ch\u1ec9 s\u1ed1 \u0111a d\u1ea1ng alpha (N, S, d, J\u2019, H\u2019 v\u00e0 Simpson) \u1edf hai nh\u00f3m r\u1eebng.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>\u0110\u1eb7c \u0111i\u1ec3m l\u00e2m h\u1ecdc, c\u1ea5u tr\u00fac r\u1eebng, r\u1eebng nhi\u1ec7t \u0111\u1edbi, t\u00e1i sinh r\u1eebng, \u0111a d\u1ea1ng th\u1ef1c v\u1eadt<\/p>\n

 <\/td>\n<\/tr>\n

Ecological characteristics of rich and medium forests in tropical moist evergreen closed forest type at Nam Huoai Forest Management Board, Lam Dong province<\/b><\/p>\n

The paper presents the results of structural analysis of timber species, forest structure, forest regeneration and plant diversity of rich and medium forest forests in tropical moist evergreen forest at the Nam Huoai Forest Management Board, Lam Dong Province. Data were collected on 10 standard plots with an area of \u200b\u200b2,500 m2<\/sup> (50 m \u00b4 50 m). On each plot, tree species composition, DBH, tree height, tree height under canopy, tree canopy diameter are measured. Results of data analysis show that the total number of timber species in the medium and rich forest categories is 53 and 46 species, in which timber species composition of the eight dominant timber species and co-dominant species is 69.4% in the medium and rich forest is 69.5%. The N\/D distribution is left- tailed form in medium forest and \u201cJ\u201d form in rich forest. Natural regeneration in both forest group occurs continuously over time. There were no significant differences in alpha diversity indices (N, S, d, J\u2019, H\u2019 and Simpson) in the two forest groups.<\/p>\n

Keywords: <\/i><\/b>Ecological characteristics, forest structures, tropical forest, forest regeneration, plant diversity<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U \u0110\u1eb6C \u0110I\u1ec2M SINH TR\u01af\u1edeNG LO\u00c0I GI\u1ed4I NHUNG\u00a0T\u1ea0I KON H\u00c0 N\u1eeaNG, T\u00c2Y NGUY\u00caN<\/p>\n

Tr\u1ea7n H\u1ed3ng S\u01a1n1,2<\/sup><\/p>\n

1NCS – Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2Trung t\u00e2m L\u00e2m nghi\u1ec7p Nhi\u1ec7t \u0111\u1edbi<\/b><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Gi\u00f4\u0309i nhung la\u0300 c\u00e2y g\u1ed7 l\u1edbn th\u01b0\u1eddng xanh, cao 30 – 40 m, \u0111\u01b0\u1eddng k\u00ednh 40 –
\n70 cm. \u0110\u00e2y la\u0300 loa\u0300i c\u00e2y \u0111\u0103\u0323c h\u01b0\u0303u cu\u0309a Vi\u00ea\u0323t Nam, chi\u0309 g\u0103\u0323p \u01a1\u0309 ca\u0301c ti\u0309nh T\u00e2y Nguy\u00ean t\u01b0\u0300 Gia Lai, \u0110\u1eafk L\u1eafk \u0111\u00ea\u0301n L\u00e2m \u0110\u00f4\u0300ng (Di Linh, Braian). C\u00e2y ph\u00e2n b\u00f4\u0301 \u01a1\u0309 \u0111\u00f4\u0323 cao 600 – 1.000 m trong ca\u0301c l\u00e2m ph\u1ea7n r\u01b0\u0300ng t\u01b0\u0323 nhi\u00ean la\u0301 r\u00f4\u0323ng th\u01b0\u01a1\u0300ng xanh ho\u0103\u0323c r\u01b0\u0300ng h\u00f4\u0303n giao v\u01a1\u0301i c\u00e2y la\u0301 kim. Trong c\u00e1c l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra t\u1ea1i Kon H\u00e0 N\u1eebng, Gi\u1ed5i nhung xu\u1ea5t hi\u1ec7n t\u1eeb 8 – 36 c\u00e2y\/ha, chi\u1ebfm t\u1eeb 1,7 – 6,2% t\u1ed5ng s\u1ed1 c\u00e1 th\u1ec3 trong c\u00e1c l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra. \u0110\u01b0\u1eddng k\u00ednh b\u00ecnh qu\u00e2n t\u1eeb 27,6 – 65,1 cm v\u00e0 chi\u1ec1u cao b\u00ecnh qu\u00e2n \u0111\u1ea1t t\u1eeb 17,6 – 29,4 m. Ti\u1ebft di\u1ec7n ngang lo\u00e0i Gi\u1ed5i nhung t\u1eeb 1,19 – 14,72 m2<\/sup>, chi\u1ebfm t\u1eeb 2,6 – 28,8% t\u1ed5ng ti\u1ebft di\u1ec7n ngang c\u1ee7a to\u00e0n l\u00e2m ph\u1ea7n. Tr\u1eef l\u01b0\u1ee3ng lo\u00e0i Gi\u1ed5i nhung t\u1eeb 13,1 – 304 m3<\/sup>\/ha, chi\u1ebfm t\u1eeb 2,4 – 37,4% t\u1ed5ng tr\u1eef l\u01b0\u1ee3ng l\u00e2m ph\u1ea7n. S\u1ed1 c\u00e1 th\u1ec3 m\u1edbi xu\u1ea5t hi\u1ec7n t\u1eeb l\u1edbp c\u00e2y t\u00e1i sinh tri\u1ec3n v\u1ecdng tham gia v\u00e0o t\u1ea7ng c\u00e2y cao dao \u0111\u1ed9ng t\u1eeb 2 – 30 c\u00e2y\/ha (n\u0103m 2008) v\u00e0 59 – 99 c\u00e2y\/ha (2012). T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u0103m 2004 v\u00e0 2017 kh\u00f4ng c\u00f3 c\u00e1 th\u1ec3 m\u1edbi n\u00e0o xu\u1ea5t hi\u1ec7n t\u1eeb l\u1edbp c\u00e2y t\u00e1i sinh k\u1ebf c\u1eadn. Ti\u1ebft di\u1ec7n ngang b\u00ecnh qu\u00e2n t\u0103ng th\u00eam c\u1ee7a c\u00e1c c\u00e1 th\u1ec3 m\u1edbi tham gia v\u00e0o t\u1ea7ng c\u00e2y g\u1ed7 \u0111\u1ea1t t\u1eeb 0,02 – 0,30 m2<\/sup>\/ha v\u00e0 tr\u1eef l\u01b0\u1ee3ng b\u00ecnh qu\u00e2n b\u1ed5 sung v\u00e0o l\u00e2m ph\u1ea7n t\u1eeb 0,26 – 4,64 m3<\/sup>\/ha.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>Gi\u1ed5i nhung, sinh tr\u01b0\u1edfng, Kon H\u00e0 N\u1eebng<\/p>\n

 <\/td>\n<\/tr>\n

Study the growth characteristics of Paramichielia braianensis<\/i> Dandy in Kon Ha Nung, Tay Nguyen<\/strong><\/p>\n

The Paramichelia braianensis<\/i> Dandy is a large evergreen tree, 30-40m high, 40-70cm in diameter. This species is endemic to Vietnam, found only in the Central Highlands provinces from Gia Lai, Dak Lak to Lam Dong (Di Linh, Braian). The tree is distributed at the height of 600 – 1.000m in stands of evergreen broardleaved forest natural or coniferous forest. In the surveyed stands in Kon Ha Nung, the Paramichielia braianensis<\/i> appearance ranged from 8 to 36 trees\/ha, accounting from 1.7 – 6.2% of the total number of individuals in the surveyed stands. The average diameter is from 27.58 – 65.11 cm, and the average height is from 17.60 – 29.41 m, higher than the mean from 114.3 – 243.2% in diameter and from 99.8 – 156.4% of the average height of the stand. The average basal from 1.19 – 14.72 m2<\/sup>, accounting from 2.6 – 28.8% of the total stand basals. The average volumes from 13.1 – 304 m3<\/sup>\/ha, accounting from 2.4 – 37.4% of total stand volumes. The number of new species emerging from the regenerated tree species ranged from 2 – 30 trees\/ha (2008) and 59 – 99 trees\/ha (2012). At the time of 2004 and 2017 no new species emerged from the nearby regenerated tree. The average basal of new individuals entering the tree floor ranged from 0.02 – 0.30 m2<\/sup>\/ha and the average volumes of replanted forest ranged from 0.26 – 4.64 m3<\/sup>\/ha.<\/p>\n

Keywords:<\/i><\/b> <\/i><\/b>Growth, Kon Ha Nung, Paramichielia braianensis Dandy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u1ed8T S\u1ed0 \u0110\u1eb6C \u0110I\u1ec2M T\u00c1I SINH\u00a0D\u01af\u1edaI T\u00c1N R\u1eeaNG K\u00cdN TH\u01af\u1edcNG XANH H\u1ed6N GIAO L\u00c1 R\u1ed8NG, L\u00c1 KIM T\u1ea0I V\u01af\u1edcN QU\u1ed0C GIA BIDOUP – N\u00daI B\u00c0, T\u1ec8NH L\u00c2M \u0110\u1ed2NG<\/p>\n

Tr\u1ea7n Th\u1ecb Thanh H\u01b0\u01a1ng1<\/sup>, Nguy\u1ec5n \u0110\u0103ng H\u1ed9i1<\/sup>, Tri\u1ec7u V\u0103n H\u00f9ng2<\/sup><\/p>\n

1<\/sup>Trung t\u00e2m Nhi\u1ec7t \u0111\u1edbi Vi\u1ec7t – Nga
\n2<\/sup>H\u1ed9i Khoa h\u1ecdc K\u1ef9 thu\u1eadt L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

R\u1eebng k\u00edn th\u01b0\u1eddng xanh h\u1ed7n giao l\u00e1 r\u1ed9ng, l\u00e1 kim v\u1edbi s\u1ef1 tham gia t\u1eadp trung c\u1ee7a c\u00e1c lo\u00e0i P\u01a1 mu (Fokienia hodginsii<\/i>), Du sam n\u00fai \u0111\u1ea5t (Keteleeria evelyniana<\/i>) Th\u00f4ng l\u00e1 d\u1eb9t (Pinus krempfii<\/i>), Th\u00f4ng n\u0103m l\u00e1 (Pinus dalatensis<\/i>) t\u1ea1i VQG Bidoup – N\u00fai b\u00e0 c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ef1 nhi\u00ean t\u01b0\u01a1ng \u0111\u1ed1i t\u1ed1t. M\u1eadt \u0111\u1ed9 c\u00e2y t\u00e1i sinh t\u1eeb 22.500-38.530 c\u00e2y\/ha, trong \u0111\u00f3, c\u00e2y t\u00e1i sinh nh\u1ecf h\u01a1n 1 m chi\u1ebfm t\u1ef7 l\u1ec7 cao, t\u1eeb 41,1-60,9%, t\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh tri\u1ec3n v\u1ecdng (Hvn<\/sub>>2 m) chi\u1ebfm 6,2-20,1% trong s\u1ed1 \u0111\u00f3, t\u01b0\u01a1ng \u1ee9ng v\u1edbi 2.000-5.740 c\u00e2y\/ha. S\u1ed1 lo\u00e0i t\u00e1i sinh \u01b0u th\u1ebf tham gia v\u00e0o c\u00f4ng th\u1ee9c t\u1ed5 th\u00e0nh, t\u1eeb 2-6 lo\u00e0i. L\u1edbp c\u00e2y t\u00e1i sinh tri\u1ec3n v\u1ecdng c\u00f3 s\u1ed1 l\u01b0\u1ee3ng lo\u00e0i th\u1ef1c v\u1eadt \u0111a d\u1ea1ng h\u01a1n, v\u1edbi 43-66 lo\u00e0i so v\u1edbi l\u1edbp c\u00e2y t\u00e1i sinh nh\u1ecf t\u1eeb 28-48 lo\u00e0i. T\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t v\u00e0 trung b\u00ecnh t\u01b0\u01a1ng \u0111\u1ed1i cao (>80%). Kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ea1i ch\u1ed7 c\u1ee7a c\u00e1c lo\u00e0i h\u1ea1t tr\u1ea7n r\u1ea5t th\u1ea5p, t\u1ef7 l\u1ec7 c\u00e2y t\u00e1i sinh trung b\u00ecnh ch\u1ec9 1,15% so v\u1edbi qu\u1ea7n x\u00e3. M\u1ea1ng h\u00ecnh ph\u00e2n b\u1ed1 c\u00e2y t\u00e1i sinh ch\u1ee7 y\u1ebfu l\u00e0 ph\u00e2n b\u1ed1 c\u1ee5m.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>Bidoup – N\u00fai B\u00e0, h\u1ed7n giao l\u00e1 r\u1ed9ng, l\u00e1 kim, t\u00e1i sinh t\u1ef1 nhi\u00ean<\/p>\n

 <\/td>\n<\/tr>\n

Natural regeneration characteristics under the canopy of closed evergreen mixed broad, needle leaf forest types in Bidoup – Nui Ba National Park, Lam Dong province<\/strong><\/p>\n

In Bidoup – Nui Ba national park, the capable natural regeneration of evergreen mixed broad, needle leaf involving concentration of Fokienia hodginsii<\/i>, Keteleeria evelyniana<\/i>, Pinus krempfii<\/i>, Pinus dalatensis<\/i> is relatively good. Density regeneration\u2019s from 22,500-38,530 trees ha-1<\/sup>, includle: the small regeneration trees (Hvn<\/sub><1 m) reached from 41.1-60.9%, the advanced regenerating trees (Hvn<\/sub>>2 m) accounted for from 6.2-20.1%, corresponding to the 2,000-5,740 trees ha-1<\/sup>. The number of dominant regenerated tree species in the species composition formula varies considerably between habitats, from 2-6 species. The advanced regeneration group\u2019s more diversified species of trees (43-66 species) than the small regeneration group (28-48 species). The rates of good and rather quality regenerating trees\u2019s relatively high (>80%). Regeneration capacity in place of the conifers are very low, the density of regeneration average of only 1.15% over the communities. Regenerated trees in most plots of the mixed broad, needle leaf forest in the study area have cluster distribution.<\/p>\n

Keywords: <\/i><\/b>Bidoup – Nui Ba, mixed broad, needle leaf, natural regeneration<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u1ea2NH H\u01af\u1edeNG C\u1ee6A QU\u1ea2N L\u00dd V\u1eacT LI\u1ec6U H\u1eeeU C\u01a0 SAU KHAI TH\u00c1C V\u00c0 B\u00d3N PH\u00c2N \u0110\u1ebeN SINH TR\u01af\u1edeNG V\u00c0 \u0110\u1ed8 PH\u00cc \u0110\u1ea4T R\u1eeaNG TR\u1ed2NG B\u1ea0CH \u0110\u00c0N LAI UP (Eucalyptus<\/i> urophylla <\/i>\u00d7<\/i> E<\/i>. pellita<\/i>)<\/p>\n

Nguy\u1ec5n Ti\u1ebfn Linh1<\/sup>, V\u00f5 \u0110\u1ea1i H\u1ea3i1<\/sup>, Tr\u1ea7n L\u00e2m \u0110\u1ed3ng2<\/sup>, Ho\u00e0ng V\u0103n Th\u00e0nh2<\/sup>, D\u01b0\u01a1ng Quang Trung2<\/sup>, Tr\u1ea7n Anh H\u1ea3i2<\/sup>, Ho\u00e0ng Th\u1ecb Nhung2<\/sup>,\u00a0Tr\u1ea7n H\u1ed3ng V\u00e2n2<\/sup>, Nguy\u1ec5n Th\u1ecb Mai Qu\u1ef3nh3<\/sup><\/p>\n

1<\/sup> Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup> Vi\u1ec7n Nghi\u00ean c\u1ee9u L\u00e2m sinh
\n3<\/sup> Sinh vi\u00ean Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

N\u0103ng su\u1ea5t v\u00e0 \u0111\u1ed9 ph\u00ec \u0111\u1ea5t sau r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n c\u00f3 nguy c\u01a1 suy tho\u00e1i cao n\u1ebfu qu\u1ea3n l\u00fd l\u1eadp \u0111\u1ecba kh\u00f4ng t\u1ed1t. Nghi\u00ean c\u1ee9u n\u00e0y \u0111\u00e1nh gi\u00e1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ed3ng th\u1eddi c\u1ee7a hai nh\u00e2n t\u1ed1 b\u00f3n ph\u00e2n v\u00e0 qu\u1ea3n l\u00fd v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c (VLHCSKT) \u0111\u1ebfn sinh tr\u01b0\u1edfng v\u00e0 t\u00ednh ch\u1ea5t \u0111\u1ea5t r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n lai UP 3 n\u0103m tu\u1ed5i \u0111\u01b0\u1ee3c tr\u1ed3ng tr\u00ean \u0111\u1ea5t tho\u00e1i h\u00f3a sau kinh doanh nhi\u1ec1u lu\u00e2n k\u1ef3 b\u1ea1ch \u0111\u00e0n t\u1ea1i Y\u00ean B\u00e1i v\u00e0 Qu\u1ea3ng Tr\u1ecb. K\u1ebft qu\u1ea3 theo d\u00f5i sinh tr\u01b0\u1edfng t\u1eeb tu\u1ed5i 1 \u0111\u1ebfn 3 cho th\u1ea5y, b\u00f3n ph\u00e2n theo nhu c\u1ea7u c\u1ee7a c\u00e2y c\u00f3 \u1ea3nh h\u01b0\u1edfng r\u00f5 r\u1ec7t t\u1edbi sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng. C\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n t\u1eeb c\u00e1c lo\u1ea1i ph\u00e2n \u0111\u01a1n bao g\u1ed3m ph\u00e2n h\u1eefu c\u01a1 vi sinh, \u0111\u1ea1m ur\u00ea, super l\u00e2n v\u00e0 kali c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t nh\u1ea5t so v\u1edbi c\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n NPK th\u01b0\u1eddng \u00e1p d\u1ee5ng trong th\u1ef1c ti\u1ec5n. B\u00f3n ch\u1ebf ph\u1ea9m sinh h\u1ecdc c\u00f3 t\u00e1c d\u1ee5ng ph\u00e2n gi\u1ea3i l\u00e2n v\u00e0 xenlulo th\u00e0nh c\u00e1c ch\u1ea5t d\u1ec5 ti\u00eau cho c\u00e2y tr\u1ed3ng, nh\u01b0ng c\u00f3 sinh tr\u01b0\u1edfng k\u00e9m h\u01a1n do th\u00ed nghi\u1ec7m kh\u00f4ng b\u00f3n b\u1ed5 sung ph\u00e2n. Tuy nhi\u00ean, sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y tr\u1ed3ng ch\u01b0a c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00f4ng th\u1ee9c \u0111\u1ed1t v\u00e0 kh\u00f4ng \u0111\u1ed1t v\u1eadt li\u1ec7u h\u1eefu c\u01a1 sau khai th\u00e1c. M\u00f9n v\u00e0 m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t h\u00f3a t\u00ednh \u0111\u1ea5t nh\u01b0 pH, \u0111a\u0323m va\u0300 l\u00e2n c\u00f3 thay \u0111\u00f4\u0309i ro\u0303 r\u00ea\u0323t sau tr\u1ed3ng r\u1eebng. Mu\u0300n va\u0300 \u0111a\u0323m t\u00f4\u0309ng s\u00f4\u0301 t\u0103ng nhe\u0323 sau tr\u00f4\u0300ng r\u01b0\u0300ng do ph\u00e2n hu\u0309y t\u01b0\u0300 VLHCSKT, nh\u01b0ng sang n\u0103m th\u01b0\u0301 2 v\u00e0 3, mu\u0300n va\u0300 \u0111a\u0323m t\u00f4\u0309ng s\u00f4\u0301 gia\u0309m ma\u0323nh. L\u00e2n gia\u0309m li\u00ean tu\u0323c t\u01b0\u0300 sau khi tr\u00f4\u0300ng la\u0323i r\u01b0\u0300ng, co\u0301 th\u00ea\u0309 la\u0300 do hi\u00ea\u0323n t\u01b0\u01a1\u0323ng c\u00f4\u0301 \u0111\u1ecbnh l\u00e2n trong \u0111\u00e2\u0301t do thay \u0111\u00f4\u0309i ho\u0301a ti\u0301nh cu\u0309a \u0111\u00e2\u0301t sau khi tr\u00f4\u0300ng la\u0323i r\u01b0\u0300ng. Ch\u01b0a co\u0301 s\u01b0\u0323 sai kha\u0301c ro\u0303 r\u00ea\u0323t v\u00ea\u0300 ti\u0301nh ch\u00e2\u0301t \u0111\u00e2\u0301t gi\u01b0\u0303a c\u00f4ng th\u01b0\u0301c \u0111\u00f4\u0301t va\u0300 kh\u00f4ng \u0111\u00f4\u0301t va\u0300 gi\u01b0\u0303a ca\u0301c c\u00f4ng th\u01b0\u0301c bo\u0301n ph\u00e2n cho \u0111\u00ea\u0301n giai \u0111oa\u0323n r\u01b0\u0300ng 3 n\u0103m tu\u00f4\u0309i.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>Qu\u1ea3n l\u00fd l\u1eadp \u0111\u1ecba, tr\u1ed3ng l\u1ea1i r\u1eebng sau khai th\u00e1c, suy tho\u00e1i \u0111\u1ea5t r\u1eebng tr\u1ed3ng, b\u1ea1ch \u0111\u00e0n lai UP.<\/p>\n

 <\/td>\n<\/tr>\n

Effects of slash and litter management and fertilizer practices on growth and soil chemical properties of Eucalyptus hybrid (E. urophylla \u00d7 E. pellita<\/i>)<\/strong><\/p>\n

Decline of yield and soil fertility of eucalypt plantations are associated with unsustainable site management practices. This study tested the simultaneous effects of fertilizers and slash management on growth and soil properties of 3-year-old Eucalyptus<\/i> hybrid (E. urophylla<\/i> \u00b4 E. pellita<\/i>) planted on degraded land after several rotations of eucaltypt plantations in Yen Bai and Quang Tri provinces. The growth data collected annually from ages 1 to 3 showed that application of fertilizers based on specific demand of the trees have a significant effect on growth rate. Fertilizer mixed from single elements including micronized organic fertilizers, urea, super phosphate and potassium fertilizers have the best growth rate compared to the NPK fertilizers commonly used in practice. Applying microorganism-inoculated products has better effect on phosphorus mineralisation and cellulose decomposition into available minerals for plant uptake, but with poorer growth rate due to lack of fertilizer application. The growth rate was not significant different between the slash and litter burning and non-burning treatments for land preparation. Soil organic carbon and some soil chemical properties such as pH, nitrogen and phosphorus have significantly changed after tree planting. Total soil organic carbon and nitrogen increased slightly after tree planting due to decomposition of organic matters from slash and litter, but in the second and third years, they decreased significantly. Extractable phosphorus continuously reduced since tree planting, which is associated with soil phosphorus immobilisation. There is not significant different in the soil properties between the burned and non-burned treatments and between fertilizer treatments up to 3 years of ages.<\/p>\n

Keywords: <\/i><\/b>Plantation site management, multi-rotation plantation management, degraded plantation forest land, Eucalyptus <\/i>urophylla \u00d7<\/i> E<\/i>. pellita<\/i><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u0102NG TR\u01af\u1edeNG SINH KH\u1ed0I D\u01af\u1edaI M\u1eb6T \u0110\u1ea4T C\u1ee6A R\u1eeaNG TH\u1ee8 SINH L\u00c1 R\u1ed8NG TH\u01af\u1edcNG XANH T\u1ea0I KON H\u00c0 N\u1eeaNG, GIA LAI<\/p>\n

Tr\u1ea7n Ho\u00e0ng Qu\u00fd<\/p>\n

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

Sinh kh\u1ed1i s\u01a1 c\u1ea5p thu\u1ea7n (NPP) c\u1ee7a h\u1ec7 sinh th\u00e1i r\u1eebng th\u1ec3 hi\u1ec7n s\u1ef1 trao \u0111\u1ed5i c\u00e1c bon gi\u1eefa h\u1ec7 sinh th\u00e1i v\u00e0 m\u00f4i tr\u01b0\u1eddng xung quanh. Trong nghi\u00ean c\u1ee9u n\u00e0y, NPP d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh cho r\u1eebng th\u1ee9 sinh l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh t\u1ea1i Kon H\u00e0 N\u1eebng, Gia Lai. S\u1ed1 li\u1ec7u \u0111\u01b0\u1ee3c thu th\u1eadp t\u1eeb 3 \u00f4 ti\u00eau chu\u1ea9n, m\u1ed7i \u00f4 c\u00f3 k\u00edch th\u01b0\u1edbc 30 m \u00b4 30 m trong th\u1eddi gian n\u0103m 2015 v\u00e0 n\u0103m 2016. Nghi\u00ean c\u1ee9u s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a Osawa A, Aizawa R (2012) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u0103ng tr\u01b0\u1edfng sinh kh\u1ed1i r\u1ec5 c\u00e1m (r\u1ec5 c\u00f3 \u0111\u01b0\u1eddng k\u00ednh \u22642 mm) v\u00e0 t\u0103ng tr\u01b0\u1edfng sinh kh\u1ed1i r\u1ec5 l\u1edbn (>2 mm). K\u1ebft qu\u1ea3 cho th\u1ea5y t\u0103ng tr\u01b0\u1edfng sinh kh\u1ed1i d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t c\u1ee7a r\u1eebng nghi\u00ean c\u1ee9u \u0111\u1ea1t 1,549 \u00b1 0,28 t\u00e2\u0301n kh\u00f4\/ha\/n\u0103m. Trong \u0111\u00f3, sinh kh\u00f4\u0301i r\u00ea\u0303 l\u01a1\u0301n la\u0300 0,91 \u00b1 0,03 t\u00e2\u0301n kh\u00f4\/ha\/n\u0103m va\u0300 sinh kh\u00f4\u0301i r\u00ea\u0303 ca\u0301m la\u0300 0,63 \u00b1 0,25 t\u00e2\u0301n kh\u00f4\/ha\/n\u0103m.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>Kon H\u00e0 N\u1eebng, r\u1eebng th\u1ee9 sinh l\u00e1 r\u1ed9ng th\u01b0\u1eddng xanh, sinh kh\u1ed1i r\u1ec5, sinh kh\u1ed1i s\u01a1 c\u1ea5p<\/p>\n

 <\/td>\n<\/tr>\n

Belowground biomass increment of secondary svergreen broadleaf forests in Kon Ha Nung, Gia Lai province<\/strong><\/p>\n

Net Primary Production (NPP) represents the carbon exchange between forest ecosystem and environment. In this study, belowground NPP was estimated for tropical secondary evergreen broadleaf forest in Hon Ha Nung, Gia Lai province. Three typical sample plots with a size of 30 m \u00b4 30 m each were established for data measurement for years 2015 and 2016. The method of Osawa A, Aizawa R (2012) was applied to determine the increment of fine root (root with diameter \u22642 mm) and the increment of coarse root (diameter >2 mm). The results indicated that belowground biomass increment of the study forests was 1.549 \u00b1 0.28 tons\/ha\/year. Of which, the increment of coarse roots was 0.91 \u00b1 0.03 tons\/ha\/year was from contribution of coarse roots and the rest was contribution of fine roots.<\/p>\n

Keywords: <\/i><\/b>Kon Ha Nung, Net Primary Production, root biomass, secondary evergreen broadleaf forest<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NGHI\u00caN C\u1ee8U NU\u00d4I TR\u1ed2NG QU\u1ea2 TH\u1ec2 \u0110\u1ec6M N\u1ea4M \u0110\u00d4NG TR\u00d9NG H\u1ea0 TH\u1ea2O B\u00d4NG TUY\u1ebeT (Isaria tenuipes<\/i>)\u00a0TR\u00caN GI\u00c1 TH\u1ec2 NH\u00c2N T\u1ea0O<\/p>\n

Ho\u00e0ng Qu\u1ed1c B\u1ea3o1<\/sup>, L\u00ea Th\u1ecb Xu\u00e2n2<\/sup>, Ph\u1ea1m Quang Thu2<\/sup><\/p>\n

1<\/sup> \u1ee6y ban nh\u00e2n d\u00e2n t\u1ec9nh L\u00e0o Cai, Nghi\u00ean c\u1ee9u sinh Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam
\n2<\/sup> Trung t\u00e2m Nghi\u00ean c\u1ee9u b\u1ea3o v\u1ec7 r\u1eebng<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

N\u1ea5m Isaria tenuipes<\/i> l\u00e0 lo\u00e0i n\u1ea5m \u0111\u00f4ng tr\u00f9ng h\u1ea1 th\u1ea3o tuy\u1ebft thu th\u1eadp t\u1eeb r\u1eebng t\u1ef1 nhi\u00ean V\u01b0\u1eddn qu\u1ed1c gia Ho\u00e0ng Li\u00ean. Hai lo\u1ea1i gi\u00e1 th\u1ec3 nh\u00e2n t\u1ea1o g\u1ed3m m\u00f4i tr\u01b0\u1eddng h\u00f3a ch\u1ea5t l\u1ecfng v\u00e0 nh\u1ed9ng ho\u1eb7c s\u00e2u t\u1eb1m \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u \u0111\u1ec3 nu\u00f4i tr\u1ed3ng th\u1ec3 qu\u1ea3 \u0111\u1ec7m. M\u00f4i tr\u01b0\u1eddng h\u00f3a ch\u1ea5t l\u1ecfng g\u1ed3m: 40 g glucose + 10 g peptone + 0,5 g KH2<\/sub>PO4<\/sub> + 0,5 g K2<\/sub>HPO4<\/sub>.3H2<\/sub>O, + 0,5 g MgSO4<\/sub>.7H2<\/sub>O + 10 g yeast extract trong 1 l\u00edt n\u01b0\u1edbc v\u00e0 m\u00f4i tr\u01b0\u1eddng g\u1ed3m 30 g glucose + 3 g peptone + 0,5 g KH2<\/sub>PO4<\/sub> + 0,5 g (NH\u00ad\u00ad4<\/sub>)2<\/sub>\u00adSO4<\/sub>, + 0,5 g MgSO4<\/sub>.7H2<\/sub>O + 1 g yeast extract +\u00a00,5 mg B1 trong 1 l\u00edt n\u01b0\u1edbc. Khi n\u1ea5m \u0111\u01b0\u1ee3c nu\u00f4i tr\u1ed3ng tr\u00ean gi\u00e1 th\u1ec3 l\u00e0 nh\u1ed9ng t\u1eb1m, t\u1ed1t nh\u1ea5t l\u00e0 nhi\u1ec5m n\u1ea5m t\u1eeb giai \u0111o\u1ea1n s\u00e2u non tu\u1ed5i 5, t\u1ef7 l\u1ec7 s\u00e2u nhi\u1ec5m n\u1ea5m 76,67%, tr\u1ecdng l\u01b0\u1ee3ng t\u01b0\u01a1i \u0111\u1ea1t 0,895 g\/nh\u1ed9ng. Khi nu\u00f4i tr\u1ed3ng tr\u00ean gi\u00e1 th\u1ec3 nh\u1ed9ng t\u1eb1m qu\u1ea3 th\u1ec3 \u0111\u1ec7m n\u1ea5m c\u00f3 m\u00e0u v\u00e0ng tr\u1eafng s\u1eefa, h\u00ecnh d\u1ea1ng v\u00e0 m\u00e0u s\u1eafc gi\u1ed1ng v\u1edbi th\u1ec3 qu\u1ea3 \u0111\u1ec7m thu \u0111\u01b0\u1ee3c ngo\u00e0i t\u1ef1 nhi\u00ean, v\u01b0\u1eddn qu\u1ed1c gia Ho\u00e0ng Li\u00ean.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>N\u1ea5m \u0110\u00f4ng tr\u00f9ng h\u1ea1 th\u1ea3o tuy\u1ebft, Isaria tenuipes<\/i>, th\u1ec3 qu\u1ea3 \u0111\u1ec7m, nh\u1ed9ng t\u1eb1m<\/p>\n

 <\/td>\n<\/tr>\n

Study on synnenmata production of snowflake Dongchunghacho (Isaria tenuipes<\/i>) on artificial substrates<\/strong><\/p>\n

Isaria tenuipes<\/i> is a fungus called snowflake Dongchunghacho due to its appearance that was collected from the natural forest of Hoang Lien National Park. Two kinds of artificial substrates including chemical broth medium and silkworm larva\/pupa were invertigated for synnenmata production. The chemical broth medium containing 40 g of glucose + 10 g of peptone + 0.5 g of KH2<\/sub>PO4<\/sub> + 0.5 g of K2<\/sub>HPO4<\/sub>: 3H2<\/sub>O, + 0.5 g of MgSO4<\/sub>.7H2<\/sub>O + 10 g of yeast extract in 1 liter H2<\/sub>O and medium 30 g glucose + 3 g peptone + 0.5 g KH2<\/sub>PO4<\/sub> + 0.5 g (NH4<\/sub>)2<\/sub>SO4<\/sub> + 0.5 g MgSO4<\/sub>.7H2<\/sub>O + 1 g yeast extract +\u00a00.5 mg B1 in 1 liter H2<\/sub>O. When the synenmata production was cultured on silkworm pupa\/larva, it was best to fungal infection from 5th instar silkworrm larva. Synnemata production of\u00a0I. tenuipes<\/i>\u00a0was excellent in 5th instar silkworrm larva with an incidence rate of 76.33%. Synnemata living weight obtained 0.895 g\/1 pupae. The synnenmata were milky-white in color, and were similar in shape and color to wild synnemata collected in Hoang Lien Natural Park.<\/p>\n

Keywords: <\/i><\/b>Snowflake Dongchunghacho, Isaria tenuipes<\/i>, synnenmata, silkworm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PH\u00d2NG TR\u1eea B\u1ec6NH LO\u00c9T TH\u00c2N DO N\u1ea4M P<\/i>seudoplagiostoma eucalypti<\/i> TR\u00caN C\u00c2Y B\u1ea0CH \u0110\u00c0N \u1ede GIAI \u0110O\u1ea0N V\u01af\u1edcN \u01af\u01a0M<\/p>\n

Nguy\u1ec5n V\u0103n Nam, Tr\u1ea7n Xu\u00e2n Hinh, Nguy\u1ec5n Minh Ch\u00ed, D\u01b0\u01a1ng Xu\u00e2n Tu\u1ea5n<\/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<\/b><\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, b\u1ec7nh lo\u00e9t th\u00e2n do n\u1ea5m Pseudoplagiostoma eucalypti<\/i> l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i b\u1ec7nh ch\u00ednh tr\u00ean c\u00e2y b\u1ea1ch \u0111\u00e0n trong giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m.<\/i>\u00a0Th\u00ed nghi\u1ec7m \u0111\u00e1nh gi\u00e1 hi\u1ec7u l\u1ef1c \u1ee9c ch\u1ebf n\u1ea5m P. eucalypti<\/i> g\u00e2y b\u1ec7nh lo\u00e9t th\u00e2n c\u1ee7a c\u00e1c lo\u1ea1i thu\u1ed1c h\u00f3a h\u1ecdc v\u00e0 sinh h\u1ecdc tr\u00ean c\u00e2y con b\u1ea1ch \u0111\u00e0n 3 th\u00e1ng tu\u1ed5i sau 10 ng\u00e0y g\u00e2y b\u1ec7nh nh\u00e2n t\u1ea1o cho th\u1ea5y t\u1ef7 l\u1ec7 c\u00e2y b\u1ecb b\u1ec7nh v\u00e0 c\u1ea5p b\u1ec7nh trung b\u00ecnh \u1edf c\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m sau khi phun thu\u1ed1c 40 ng\u00e0y c\u00f3 s\u1ef1 sai kh\u00e1c r\u00f5 r\u1ec7t. C\u00e1c c\u00f4ng th\u1ee9c phun thu\u1ed1c ho\u0301a ho\u0323c Carbenzim 500FL, Tilt super 300EC v\u00e0 Ao\u2019Yo 300SC \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao nh\u1ea5t khi tr\u1eeb b\u1ec7nh, t\u1ef7 l\u1ec7 c\u00e2y ph\u1ee5c h\u1ed3i \u0111\u1ea1t 77,8%; 88,9% v\u00e0 90%; C\u00f4ng th\u1ee9c phun thu\u1ed1c sinh h\u1ecdc Sat 4SL \u0111\u1ea1t hi\u1ec7u qu\u1ea3 24,5% t\u1ef7 l\u1ec7 c\u00e2y ph\u1ee5c h\u1ed3i.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>B\u1ea1ch \u0111\u00e0n, ph\u00f2ng tr\u1eeb, Pseudoplagiostoma eucalypti<\/i><\/p>\n

 <\/td>\n<\/tr>\n

Control of Pseudoplagiostoma eucalypti<\/i> causing canker disease on Eucalyptus in nursery period<\/strong><\/p>\n

In recent years, Pseudoplagiostoma eucalypti<\/i> causing canker is one of the major diseases in eucalyptus species during nursery period. 40 days after applying different chemical fungicides and biological agents on infected three – month eucalyptus seedlings (after 10 days of pathogenicity by P. eucalypti<\/i>) showed that damage incidence and average damage index in the treatment formulas were significant difference. The treatment formulas using Carbenzim 500FL, Tilt super 300EC and Ao\u2019Yo 300SC reached the highest result with recovery rate from infected seedlings are 77.8%, 88.9 and 90%, respectively. The recovery rate in treatment formula using biological agent Sat 4SL is only 24.5%.<\/p>\n

Keywords: <\/i><\/b>Control, Eucalyptus, Pseudoplagiostoma eucalypti<\/i><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u00c1NH GI\u00c1 HI\u1ec6U QU\u1ea2 \u0110\u1ea6U T\u01af KINH DOANH R\u1eeaNG TR\u1ed2NG\u00a0T\u1ea0I V\u00d9NG U MINH H\u1ea0, T\u1ec8NH C\u00c0 MAU<\/p>\n

Ng\u00f4 V\u0103n Ng\u1ecdc1<\/sup>, Ki\u1ec1u Tu\u1ea5n \u0110\u1ea1t1<\/sup>, Tr\u1ea7n Thanh Cao1<\/sup>,\u0110\u1eb7ng Ph\u01b0\u1edbc \u0110\u1ea1i1<\/sup>,\u00a0Nguy\u1ec5n Trung Th\u00f4ng1<\/sup>, Tr\u1ea7n Qu\u1ed1c Kh\u00e1i2<\/sup><\/p>\n

1<\/sup>Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Nam B\u1ed9,
\n2<\/sup>C\u00f4ng ty TNHH MTV L\u00e2m nghi\u1ec7p U Minh H\u1ea1<\/p>\n\n\n\n\n
T\u00d3M T\u1eaeT<\/p>\n

Nghi\u00ean c\u1ee9u \u201c\u0110\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 \u0111\u1ea7u t\u01b0 kinh doanh r\u1eebng tr\u1ed3ng t\u1ea1i v\u00f9ng U Minh H\u1ea1, t\u1ec9nh C\u00e0 Mau\u201d \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n n\u0103m 2017 tr\u00ean \u0111\u1ecba b\u00e0n 04 x\u00e3 thu\u1ed9c huy\u1ec7n U Minh. Nghi\u00ean c\u1ee9u \u0111\u00e3 kh\u1ea3o s\u00e1t, \u0111i\u1ec1u tra tr\u00ean di\u1ec7n t\u00edch 527 ha r\u1eebng tr\u1ed3ng n\u0103m 2012 v\u1edbi 04 m\u00f4 h\u00ecnh ch\u00ednh: (1) M\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng keo lai tr\u00ean b\u1edd bao (2) M\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng keo lai tr\u00ean l\u00edp (3) M\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Tr\u00e0m l\u00e1 d\u00e0i tr\u00ean l\u00edp v\u00e0 (4) M\u00f4 h\u00ecnh r\u1eebng tr\u1ed3ng Tr\u00e0m ta tr\u00ean l\u00edp. S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra sinh tr\u01b0\u1edfng r\u1eebng, thu th\u1eadp chi ph\u00ed \u0111\u1ea7u t\u01b0 v\u00e0 gi\u00e1 th\u00e0nh s\u1ea3n ph\u1ea9m c\u00e2y \u0111\u1ee9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 hi\u1ec7u qu\u1ea3 kinh t\u1ebf c\u1ee7a t\u1eebng m\u00f4 h\u00ecnh. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u cho th\u1ea5y: Sinh tr\u01b0\u1edfng r\u1eebng tr\u1ed3ng sau 5 n\u0103m tu\u1ed5i c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh \u0111\u1ec1u kh\u00e1 t\u1ed1t, cho n\u0103ng su\u1ea5t t\u1eeb 19,8 – 47,2 m3<\/sup>\/ha\/n\u0103m. Trong \u0111\u00f3, m\u00f4 h\u00ecnh keo lai tr\u00ean b\u1edd bao c\u00f3 n\u0103ng su\u1ea5t cao nh\u1ea5t, \u2248 47 m3<\/sup>\/ha\/n\u0103m; k\u1ebf \u0111\u1ebfn l\u00e0 c\u00e1c m\u00f4 h\u00ecnh keo lai v\u00e0 Tr\u00e0m l\u00e1 d\u00e0i tr\u00ean l\u00edp, \u0111\u1ea1t \u2248 34 m3<\/sup>\/ha\/n\u0103m v\u00e0 32,8 m3<\/sup>\/ha\/n\u0103m; m\u00f4 h\u00ecnh Tr\u00e0m ta cho n\u0103ng su\u1ea5t th\u1ea5p nh\u1ea5t 19,8 m3<\/sup>\/ha\/n\u0103m. Hi\u1ec7u qu\u1ea3 \u0111\u1ea7u t\u01b0 kinh doanh r\u1eebng tr\u1ed3ng c\u1ee7a c\u00e1c m\u00f4 h\u00ecnh kh\u00e1 cao: Gi\u00e1 tr\u1ecb l\u1ee3i nhu\u1eadn r\u00f2ng tr\u01b0\u1edbc thu\u1ebf c\u1ee7a m\u00f4 h\u00ecnh keo lai tr\u00ean b\u1edd bao \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao nh\u1ea5t \u2248 89,7 tri\u1ec7u \u0111\u1ed3ng\/ha, k\u1ebf \u0111\u1ebfn l\u00e0 Tr\u00e0m l\u00e1 d\u00e0i tr\u00ean l\u00edp v\u00e0 keo lai tr\u00ean l\u00edp v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u1ee9ng l\u00e0 69,7 tri\u1ec7u \u0111\u1ed3ng\/ha v\u00e0 59 tri\u1ec7u \u0111\u1ed3ng\/ha, th\u1ea5p nh\u1ea5t l\u00e0 Tr\u00e0m ta tr\u00ean l\u00edp l\u00e0 35 tri\u1ec7u \u0111\u1ed3ng\/ha; t\u1ef7 s\u1ed1 l\u1ee3i \u00edch v\u00e0 chi ph\u00ed c\u1ee7a m\u00f4 h\u00ecnh Tr\u00e0m l\u00e1 d\u00e0i cao nh\u1ea5t l\u00e0 2,34 l\u1ea7n, keo lai tr\u00ean b\u1edd bao 2,14 l\u1ea7n, keo lai v\u00e0 Tr\u00e0m ta tr\u00ean l\u00edp t\u01b0\u01a1ng \u0111\u01b0\u01a1ng l\u00e0 1,9 l\u1ea7n. Ph\u00e2n t\u00edch \u0111\u1ed9 nh\u1ea1y \u0111\u00e3 ch\u1ec9 ra khi s\u1ea3n l\u01b0\u1ee3ng v\u00e0 gi\u00e1 b\u00e1n gi\u1ea3m 10% th\u00ec l\u1ee3i nhu\u1eadn r\u00f2ng tr\u01b0\u1edbc thu\u1ebf v\u1eabn \u1edf m\u1ee9c cao t\u1eeb 23 tri\u1ec7u \u0111\u1ed3ng\/ha \u0111\u1ebfn 61,6 tri\u1ec7u \u0111\u1ed3ng\/ha. Trong \u0111\u00f3, hai m\u00f4 h\u00ecnh keo lai tr\u00ean b\u1edd bao v\u00e0 Tr\u00e0m l\u00e1 d\u00e0i tr\u00ean l\u00edp kh\u00e1 an to\u00e0n t\u01b0\u01a1ng \u1ee9ng l\u00e0 61,6 tri\u1ec7u v\u00e0 48,6 tri\u1ec7u \u0111\u1ed3ng\/ha.<\/p>\n

T\u1eeb kh\u00f3a:<\/i><\/b> <\/b>Tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t, hi\u1ec7u qu\u1ea3 \u0111\u1ea7u t\u01b0, U Minh H\u1ea1, t\u1ec9nh\u00a0C\u00e0 Mau<\/p>\n

 <\/td>\n<\/tr>\n

Evaluation of investment efficiency in planting forest at U Minh Ha region, Ca Mau province<\/strong><\/p>\n

The study \u201cEvaluation of investment efficiency in planting forest at U Minh Ha region, Ca Mau Province\u201d was conducted in 2017 on the area of four communes of U Minh district, Ca Mau province. The area of 527 hectares an of productive plantation planted in 2012 was investigated in four main models: Acacia hybrid planting on high embankment (AHHE), Acacia hybrid planting on embankment (AHE), Melaleuca leucadendra<\/i> planting on embankment (MLE) and Melaleuca cajuputi<\/i> planting on embankment (MCE). Using the method of investigating the growth of trees, collecting investment costs and product prices to evaluate economic efficiency of each model. The study found that growth of plantation of all models were quite good for productivity after five years of planting, ranging from 19.8 to\u00a047.2 m3<\/sup>\/ha\/year. Among the models, the AHHE had the highest productivity reaching \u2248 47 m3<\/sup>\/ha\/year; next were the two models of AHE and MLE, obtaining \u2248 34 m3<\/sup>\/ha\/year and 32.8 m3<\/sup>\/ha\/year, respectively; the model of MCE had the lowest yield with 19.8 m3<\/sup>\/ha\/year. Investment efficiency of the models were quite high: the net profit value before tax of the AHHE was the most effective, \u2248 89.7 million VND\/ha, followed by the AHE and the MLE models which values were 69.7 million VND\/ha and 59 million VND\/ha, the lowest was 35 million VND\/ha <\/i>for the MCE model; the ratio of the benefits and costs of the MLE model is the highest \u2248 2.34 times, the AHHE was 2.14 times while AHB and MCE were equivalently 1.9 times. Sensitivity analysis has shown that in an assumption that the reduction of 10% of wood yield and price, the net profit before tax remained at high levels, ranging from 23 million VND\/ha to 61.6 million VND\/ha. Two models of AHHE and MLB were quite safe with 61.6 million and 48.6 million VND\/ha, respectively.<\/p>\n

Keywords: <\/i><\/b>Plantation forest, investment efficiency, U Minh Ha, Ca Mau province.<\/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 2 – 2018 \u00a0 1 Ch\u1ecdn gi\u1ed1ng Tr\u00f4m (Sterculia foetida L.) theo h\u01b0\u1edbng l\u1ea5y m\u1ee7 \u1edf v\u00f9ng kh\u00f4 h\u1ea1n Nam Trung B\u1ed9 Breeding Sterculia foetida L. for gum purposes in dry land of South Central Vietnam Ph\u00f9ng V\u0103n Khen Ph\u00f9ng V\u0103n Khang Nguy\u1ec5n Tr\u1ecdng Nam 3 2 Nghi\u00ean […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26,24],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1601"}],"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=1601"}],"version-history":[{"count":5,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1601\/revisions"}],"predecessor-version":[{"id":1697,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/1601\/revisions\/1697"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=1601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=1601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=1601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}