{"id":17007,"date":"2017-04-18T16:21:07","date_gmt":"2017-04-18T09:21:07","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=17007"},"modified":"2017-06-02T09:58:58","modified_gmt":"2017-06-02T02:58:58","slug":"thong-tin-luan-an-tien-si-cua-ncs-lai-thanh-hai","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/thong-tin-luan-an-tien-si-cua-ncs-lai-thanh-hai\/","title":{"rendered":"Th\u00f4ng tin lu\u1eadn \u00e1n Ti\u1ebfn s\u0129 c\u1ee7a NCS L\u1ea1i Thanh H\u1ea3i"},"content":{"rendered":"

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam tr\u00e2n tr\u1ecdng gi\u1edbi thi\u1ec7u lu\u1eadn \u00e1n Ti\u1ebfn s\u0129 v\u1ec1\u0111\u1ec1 t\u00e0i lu\u1eadn \u00e1n: “Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 c\u01a1 s\u1edf khoa h\u1ecdc \u0111\u1ec3 tr\u1ed3ng r\u1eebng Xoan nh\u1eeb (Choerospondias axillaris<\/em> (Roxb.) Burtt. et Hill) cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i S\u01a1n La v\u00e0 L\u00e0o Cai”.
\nChuy\u00ean ng\u00e0nh: L\u00e2m sinh; M\u00e3 s\u1ed1: 62 62 02 05.
\nH\u1ecd v\u00e0 t\u00ean NCS: L\u1ea1i Thanh H\u1ea3i.
\nH\u1ecd v\u00e0 t\u00ean c\u00e1n b\u1ed9 h\u01b0\u1edbng d\u1eabn:\u00a0 PGS.TS Tr\u1ea7n V\u0103n Con
\nC\u01a1 s\u1edf \u0111\u00e0o t\u1ea1o: Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam.<\/p>\n

T\u00f3m t\u1eaft nh\u1eefng k\u1ebft lu\u1eadn m\u1edbi c\u1ee7a lu\u1eadn \u00e1n<\/strong><\/p>\n

1. \u0110\u1eb7c \u0111i\u1ec3m sinh h\u1ecdc
\n– Xoan nh\u1eeb l\u00e0 c\u00e2y g\u1ed7 l\u1edbn, cao 20-35m, l\u00e1 r\u1ee5ng theo m\u00f9a, th\u00e2n c\u00e2y to, th\u1eb3ng, \u0111\u01b0\u1eddng k\u00ednh c\u00f3 th\u1ec3 tr\u00ean 1m. L\u00e1 k\u00e9p l\u00f4ng chim l\u1ebb 1 l\u1ea7n, m\u1ecdc c\u00e1ch. L\u00e1 ch\u00e9t m\u1ecdc \u0111\u1ed1i, l\u00e1 m\u1ea3nh c\u00f3 t\u1eeb 8-10 \u0111\u00f4i g\u00e2n nh\u1ecf. Hoa t\u1ea1p t\u00ednh, kh\u00e1c g\u1ed1c, qu\u1ea3 n\u1ea1c h\u00ecnh tr\u1ee9ng hay h\u00ecnh c\u1ea7u,\u00a0 h\u1ea1t c\u1ee9ng c\u00f3 5 l\u1ed7 tr\u00ean \u0111\u1ec9nh. Xoan nh\u1eeb c\u00f3 bi\u00ean \u0111\u1ed9 sinh th\u00e1i r\u1ed9ng, n\u01a1i c\u00f3 nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh kho\u1ea3ng 22,80 C, bi\u00ean \u0111\u1ed9 nhi\u1ec7t trong ng\u00e0y 7,90C \u2013 9,80C, l\u01b0\u1ee3ng m\u01b0a t\u1eeb 1.444 mm – 1.764 mm, \u0111\u1ed9 \u1ea9m 68,9% – 95%, th\u00edch h\u1ee3p v\u1edbi \u0111\u1ea5t c\u00f3 h\u00e0m l\u01b0\u1ee3ng m\u00f9n v\u00e0 \u0111\u1ea1m trung b\u00ecnh kh\u00e1, h\u00e0m l\u01b0\u1ee3ng l\u00e2n ngh\u00e8o v\u00e0 kali t\u1eeb trung b\u00ecnh \u0111\u1ebfn kh\u00e1, \u0111\u1ea5t chua. Xoan nh\u1eeb \u00edt c\u00f3 \u00fd ngh\u0129a sinh th\u00e1i v\u1edbi ch\u1ec9 s\u1ed1 IV (%) t\u1eeb 1,2 \u2013 6,0. Kh\u1ea3 n\u0103ng t\u00e1i sinh t\u1ef1 nhi\u00ean c\u1ee7a Xoan nh\u1eeb d\u01b0\u1edbi t\u00e1n r\u1eebng k\u00e9m, ch\u1ee7 y\u1ebfu t\u00e1i sinh t\u1eeb h\u1ea1t.
\n– Xoan nh\u1eeb r\u1ee5ng l\u00e1 t\u1eeb th\u00e1ng 11 n\u0103m tr\u01b0\u1edbc \u0111\u1ebfn th\u00e1ng 2 n\u0103m sau; C\u00e2y ra ch\u1ed3i cu\u1ed1i th\u00e1ng 2 – 5, ra l\u00e1 v\u00e0o cu\u1ed1i th\u00e1ng 2 – 7, ra n\u1ee5 v\u00e0 hoa t\u1eeb th\u00e1ng 4 – 9, ra qu\u1ea3 v\u00e0o th\u00e1ng 4 – 10, qu\u1ea3 ch\u00edn r\u1ed9 v\u00e0o cu\u1ed1i th\u00e1ng 8 – 11.
\n– Nhu c\u1ea7u \u00e1nh s\u00e1ng c\u1ee7a Xoan nh\u1eeb c\u00f3 xu th\u1ebf t\u0103ng theo tu\u1ed5i t\u1eeb tu\u1ed5i 6 tr\u1edf l\u00ean th\u00ec \u01b0a s\u00e1ng ho\u00e0n to\u00e0n.
\n– G\u1ed7 Xoan nh\u1eeb c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang 0,67 g\/cm3;
\n2. V\u1ec1 k\u1ef9 thu\u1eadt nh\u00e2n gi\u1ed1ng Xoan nh\u1eeb
\n– 1kg h\u1ea1t c\u00f3 t\u1eeb 1.050 – 1.200 h\u1ea1t, t\u1ef7 l\u1ec7 h\u1ea1t ch\u1eafc l\u00e0 95%.
\n– H\u1ea1t khi \u0111em gieo c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd ng\u00e2m trong n\u01b0\u1edbc n\u00f3ng 1000C trong 8 gi\u1edd ho\u1eb7c \u0111\u1ed1t.
\n– \u1ede giai \u0111o\u1ea1n v\u01b0\u1eddn \u01b0\u01a1m, c\u00e2y d\u01b0\u1edbi 4 th\u00e1ng tu\u1ed5i t\u1ef7 l\u1ec7 che s\u00e1ng th\u00edch h\u1ee3p l\u00e0 50%, sau \u0111\u00f3 gi\u1ea3m d\u1ea7n, 6 th\u00e1ng tu\u1ed5i l\u00e0 25% v\u1edbi th\u00e0nh ph\u1ea7n ru\u1ed9t b\u1ea7u l\u00e0 88% \u0111\u1ea5t t\u1ea7ng m\u1eb7t + 10% ph\u00e2n chu\u1ed3ng hoai + 2% supe l\u00e2n ho\u1eb7c 83% \u0111\u1ea5t t\u1ea7ng m\u1eb7t + 15% ph\u00e2n chu\u1ed3ng hoai + 2% supe l\u00e2n. T\u01b0\u1edbi n\u01b0\u1edbc v\u00e0o bu\u1ed5i s\u00e1ng v\u1edbi li\u1ec1u l\u01b0\u1ee3ng 3 – 4l\u00edt\/m2.
\n– C\u00f3 th\u1ec3 nh\u00e2n gi\u1ed1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u00e2m hom, nh\u01b0ng ph\u1ea3i s\u1eed d\u1ee5ng ch\u1ea5t k\u00edch th\u00edch IAA 1% ho\u1eb7c IBA 1,5%. M\u00f9a v\u1ee5 th\u00edch h\u1ee3p nh\u1ea5t l\u00e0 th\u00e1ng 6.
\n3. Ch\u1ecdn c\u00e2y tr\u1ed9i v\u00e0 Kh\u1ea3o nghi\u1ec7m xu\u1ea5t x\u1ee9
\nCh\u1ecdn \u0111\u01b0\u1ee3c 40 c\u00e2y tr\u1ed9i Xoan nh\u1eeb t\u1ea1i 8 t\u1ec9nh mi\u1ec1n n\u00fai ph\u00eda b\u1eafc \u0111\u1ec3 cung c\u1ea5p v\u1eadt li\u1ec7u cho nh\u00e2n gi\u1ed1ng, sau 28 th\u00e1ng tr\u1ed3ng xu\u1ea5t x\u1ee9 V\u0103n B\u00e0n (L\u00e0o Cai) t\u1ecf ra t\u1ed1t nh\u1ea5t
\n4. V\u1ec1 c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng Xoan nh\u1eeb
\nB\u01b0\u1edbc \u0111\u1ea7u cho th\u1ea5y Xoan nh\u1eeb c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n n\u1ebfu tr\u1ed3ng h\u1ed7n giao v\u1edbi Keo tai t\u01b0\u1ee3ng v\u00e0 b\u00f3n l\u00f3t 200g super\u00a0l\u00e2n + 200 g NPK (5:10:3) ho\u1eb7c 400g super l\u00e2n\/h\u1ed1<\/p>\n

INFORMATION ON DOCTORAL DISSERTATION<\/p>\n

Dissertation title: “Studies on some key scientific fundementals for establishment of timber plantation of Choerospondias axillarix<\/em> (Roxb.) Burtt. et Hill in the provinces of Son La and Lao Cai
\nMajor: Silviculture;\u00a0\u00a0 Code: 62 62 02 05.
\nFull name of Ph.D student: Lai Thanh Hai
\nFull name of supervisor: Assoc. Prof. Ph.D Tran Van Con
\nTraining Institution: Vietnamese Academy of Forest Sciences<\/p>\n

Summary of new findings of the dissertation<\/strong><\/p>\n

1. Biological characteristics
\n– Choerospondias axillaris is the large tree, 20-35m in height, seasonally fallen leaves, large and straight trunk whose diameter can be up to 1m, under odd pinnate compound leaves type which grow staggered. Leaflets grow symmetrically, which are thin with 8-10 pairs of small veins. Flowers have different characteristics and originals, lean fruits are oval or spherical, hard grains have 5 holes on the top. Choerospondias axillaris has wide ecological amplitude in which the average temperature is about 22.80C, amplitude of the heat of the day is from 7.90C – 9.80C, rainfall is from 1,444 mm – 1,764 mm, humidity is 68.9% – 95%, suitable for soil with fairly good humus and protein contents, poor phosphate content, from average to good potassium content, acid soil. Choerospondias axillaris is less ecologically significant with index IV (%) from 1.2 to 6.0. The natural regeneration capacity of Choerospondias axillaris under the forest canopy is not good, mainly regenerated from grains.
\n– Choerospondias axillaris is deciduous from November of previous year to February of the next year; Tree sprouts shoots at the end of February to May, leaves at the end of February to July, buds and flowers from April to September, fruits on April to October, ripe fruit at the end of August to November.
\n– The demand for light of Choerospondias axillaris has tend to increase by age that trees from 6 years old and over prefer light completely.
\n– Wood from Choerospondias axillaris has a specific gravity of 0.67 g\/cm3;
\n2. Multiplication techniques for Choerospondias axillaris
\n– There are 1,050 \u2013 1,200 seeds per 1kg, percentage of firm seeds is 95%.
\n– When being sown, seeds should be soaked in hot water 1000C in 8 hours or burnt.
\n– At the nursery stage, for trees under 4 months of age,\u00a0 appropriate shading rate is 50%, which is then decreased, that of 6 months trees is 25% with the potting media as 88% of\u00a0 the topsoil + 10% of composted manure + 2% of superphosphate or 83% topsoil + 15% of composted manure + 2% superphosphate. Water splashing is performed in the morning with a dose of 3-4 liters\/m2.
\n– Propagation could be done by cutting, but must be used stimulanta IAA 1% or IBA 1.5%. The most suitable season is June.
\n3. Selection of dominant trees and Provenance testing
\nSelected 40 dominant trees in 8 provinces in the north to provide materials for propagation, after 28 months of planting, trees in Van Ban (Lao Cai) proved the best.
\n4. Silviculture techniques for planting of Choerospondias axillaris
\nInitially, it showed that the growth of Choerospondias axillaris would be better if mixed planting with Acacia mangium and basal fertilizing 200g of superphosphate + 200g of NPK (5:10:3) or 400g of superphosphate \/holes.<\/p>\n

Lu\u1eadn \u00e1n, t\u00f3m t\u1eaft lu\u1eadn \u00e1n xem t\u1ea1i \u0111\u00e2y:\u00a0Lu\u1eadn \u00e1n<\/a>;\u00a0TT Luan an_English<\/a>;TT lu\u1eadn \u00e1n<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam tr\u00e2n tr\u1ecdng gi\u1edbi thi\u1ec7u lu\u1eadn \u00e1n Ti\u1ebfn s\u0129 v\u1ec1\u0111\u1ec1 t\u00e0i lu\u1eadn \u00e1n: “Nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 c\u01a1 s\u1edf khoa h\u1ecdc \u0111\u1ec3 tr\u1ed3ng r\u1eebng Xoan nh\u1eeb (Choerospondias axillaris (Roxb.) Burtt. et Hill) cung c\u1ea5p g\u1ed7 l\u1edbn t\u1ea1i S\u01a1n La v\u00e0 L\u00e0o Cai”. Chuy\u00ean ng\u00e0nh: L\u00e2m sinh; M\u00e3 s\u1ed1: 62 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[42,66,1],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/17007"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=17007"}],"version-history":[{"count":6,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/17007\/revisions"}],"predecessor-version":[{"id":17108,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/17007\/revisions\/17108"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=17007"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=17007"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=17007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}