{"id":9651,"date":"2011-07-01T03:28:39","date_gmt":"2011-06-30T20:28:39","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2011\/07\/tinh-chat-vat-ly-co-hoc-va-huong-su-dung-go-cua-mot-so-loai-cay-cho-trong-rung-san-xuat-vung-dong-nam-bo\/"},"modified":"2013-10-06T09:02:24","modified_gmt":"2013-10-06T02:02:24","slug":"tinh-chat-vat-ly-co-hoc-va-huong-su-dung-go-cua-mot-so-loai-cay-cho-trong-rung-san-xuat-vung-dong-nam-bo","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/tinh-chat-vat-ly-co-hoc-va-huong-su-dung-go-cua-mot-so-loai-cay-cho-trong-rung-san-xuat-vung-dong-nam-bo\/","title":{"rendered":"T\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 h\u01b0\u1edbng s\u1eed d\u1ee5ng g\u1ed7 c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y cho tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t v\u00f9ng \u0110\u00f4ng Nam b\u1ed9"},"content":{"rendered":"

L\u00ea Thu Hi\u1ec1n, \u0110\u1ed7 V\u0103n B\u1ea3n, Nguy\u1ec5n T\u1eed Kim<\/strong> <\/p>\n

Ph\u00f2ng Nghi\u00ean c\u1ee9u T\u00e0i nguy\u00ean Th\u1ef1c v\u1eadt r\u1eebng<\/em> <\/p>\n

Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam<\/em> <\/p>\n

T\u00d3M T\u1eaeT<\/strong> <\/p>\n

Nghi\u00ean c\u1ee9u \u0111\u1eb7c t\u00ednh c\u01a1 b\u1ea3n c\u1ee7a g\u1ed7 trong \u0111\u00f3 bao g\u1ed3m t\u00ednh ch\u1ea5t g\u1ed7 v\u00e0 c\u1ea5u t\u1ea1o g\u1ed7 l\u00e0 r\u1ea5t quan tr\u1ecdng b\u1edfi n\u00f3 li\u00ean quan ch\u1eb7t ch\u1ebd t\u1edbi ch\u1ebf bi\u1ebfn v\u00e0 s\u1eed d\u1ee5ng g\u1ed7. Nghi\u00ean c\u1ee9u v\u1ec1 khoa h\u1ecdc g\u1ed7 \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1eeb 50 n\u0103m tr\u01b0\u1edbc \u1edf m\u1ed9t s\u1ed1 vi\u1ec7n nghi\u00ean c\u1ee9u, \u0111\u1eb7c bi\u1ec7t l\u00e0 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam. \u0110\u1ec1 t\u00e0i “Nghi\u00ean c\u1ee9u c\u1ea5u t\u1ea1o v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 v\u1eadt l\u00fd c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i g\u1ed7 v\u00e0 tre ch\u1ee7 y\u1ebfu \u1edf Vi\u1ec7t Nam l\u00e0m c\u01a1 s\u1edf cho ch\u1ebf bi\u1ebfn, b\u1ea3o qu\u1ea3n v\u00e0 s\u1eed d\u1ee5ng” \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1eeb n\u0103m 2006 c\u00f3 n\u1ed9i dung quan tr\u1ecdng l\u00e0 t\u1ed5ng h\u1ee3p c\u00e1c nghi\u00ean c\u1ee9u \u0111\u00e3 c\u00f3 v\u1ec1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, v\u1eadt l\u00fd v\u00e0 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu c\u1ee7a g\u1ed7. Trong b\u00e1o c\u00e1o n\u00e0y ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c th\u00f4ng tin c\u01a1 b\u1ea3n v\u1ec1 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 \u0111\u1ecbnh h\u01b0\u1edbng s\u1eed d\u1ee5ng g\u1ed7 c\u1ee7a 11 lo\u00e0i c\u00e2y n\u1eb1m trong danh l\u1ee5c c\u00e1c lo\u00e0i c\u00e2y ch\u1ee7 y\u1ebfu cho tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t v\u00f9ng \u0110\u00f4ng Nam B\u1ed9. <\/p>\n

G\u1ed7 B\u00f4ng g\u00f2n, D\u00f3 tr\u1ea7m, G\u00e1o tr\u1eafng, L\u00e1t mexico c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch r\u1ea5t nh\u1eb9 (320-490 kg\/m3<\/sup>); H\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch nh\u1ecf (0.31-0.38); Gi\u1edbi h\u1ea1n b\u1ec1n khi n\u00e9n d\u1ecdc th\u1edb v\u00e0 gi\u1edbi h\u1ea1n b\u1ec1n khi u\u1ed1n t\u0129nh y\u1ebfu (l\u1ea7n l\u01b0\u1ee3t l\u00e0 203-369.5 kg\/cm2<\/sup> v\u00e0 337-677 kg\/cm2<\/sup>). B\u00f4ng g\u00f2n v\u00e0 D\u00f3 tr\u1ea7m c\u00f3 s\u1ee9c ch\u1ed1ng t\u00e1ch y\u1ebfu (6.28-9.8 kg\/cm), h\u1ec7 s\u1ed1 u\u1ed1n va \u0111\u1ea1p trung b\u00ecnh (0.51-0.54); G\u1ed7 G\u00e1o tr\u1eafng c\u1ea3 2 gi\u00e1 tr\u1ecb \u1edf m\u1ee9c trung b\u00ecnhtrong khi L\u00e1t Mexico c\u00f3 s\u1ee9c ch\u1ed1ng t\u00e1ch trung b\u00ecnh v\u00e0 h\u1ec7 s\u1ed1 va \u0111\u1eadp l\u1edbn.<\/em> \u0110i\u1ec3m b\u00e3o h\u00f2a th\u1edb g\u1ed7 th\u1ea5p (24%) \u1edf g\u1ed7 D\u00f3 tr\u1ea7m, <\/em>trung b\u00ecnh (25-27.8%) \u1edf g\u1ed7 G\u00e1o tr\u1eafng v\u00e0 g\u1ed7 L\u00e1t Mexiconh\u01b0ng cao (36.9%) \u1edf g\u1ed7 B\u00f4ng g\u00f2n. <\/p>\n

G\u1ed7 Keo l\u00e1 tr\u00e0m, keo lai, Keo tai t\u01b0\u1ee3ng, Xoan ta c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch nh\u1eb9 (524-597 kg\/m3<\/sup>); H\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch trung b\u00ecnh (0.39-0.46); Gi\u1edbi h\u1ea1n b\u1ec1n khi u\u1ed1n t\u0129nh y\u1ebfu (627-1013 kg\/cm2<\/sup>); S\u00fac ch\u1ed1ng t\u00e1ch trung b\u00ecnh (10.5-12.7 kg\/cm). Keo lai v\u00e0 Xoan ta c\u00f3 gi\u1edbi h\u1ea1n b\u1ec1n khi n\u00e9n d\u1ecdc th\u1edb y\u1ebfu (335-417 kg\/cm2<\/sup>). Keo l\u00e1 tr\u00e0m v\u00e0 Keo tai t\u01b0\u1ee3ng c\u00f3 gi\u1edbi h\u1ea1n b\u1ec1n khi n\u00e9n d\u1ecdc th\u1edb \u1edf m\u1ee9c trung b\u00ecnh (432-462kg\/cm2<\/sup>). <\/em>H\u1ec7 s\u1ed1 u\u1ed1n va \u0111\u1eadp nh\u1ecf (0.54) \u1edf Xoan ta v\u00e0 cao (1.1) \u1edf Keo l\u00e1 tr\u00e0m.<\/em> <\/p>\n

G\u1ed7 D\u1ea7u r\u00e1i, Sao \u0111en, Xoan m\u1ed9c c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch trung b\u00ecnh (690-754 kg\/m3<\/sup>); \u0110i\u1ec3m b\u00e3o h\u00f2a th\u1edb g\u1ed7 th\u1ea5p (18-24%); Gi\u1edbi h\u1ea1n b\u1ec1n khi n\u00e9n d\u1ecdc v\u00e0 u\u1ed1n t\u0129nh \u1edf m\u1ee9c trung b\u00ecnh ( l\u1ea7n l\u01b0\u1ee3t l\u00e0 570-740 kg\/cm2<\/sup> v\u00e0 1145-1635 kg\/cm2<\/sup>); S\u1ee9c ch\u1ed1ng t\u00e1ch trung b\u00ecnh (16-16.6 kg\/cm). H\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch trung b\u00ecnh (0.45-0.54) \u1edf g\u1ed7 D\u1ea7u r\u00e1i v\u00e0 g\u1ed7 Sao \u0111en nh\u01b0ng cao (0.64) \u1edf g\u1ed7 Xoan m\u1ed9c. <\/em>G\u1ed7 D\u1ea7u r\u00e1i v\u00e0 g\u1ed7 Xoan m\u1ed9c c\u00f3 h\u1ec7 s\u1ed1 u\u1ed1n va \u0111\u1eadp trung b\u00ecnh (0.6-0.7), g\u1ed7 Sao \u0111en c\u00f3 h\u1ec7 s\u1ed1 u\u1ed1n va \u0111\u1eadp cao (1.08).<\/em>C\u0103n c\u1ee9 v\u00e0o t\u00ednh ch\u1ea5t g\u1ed7 c\u1ee7a 11 lo\u00e0i c\u00e2y g\u1ed7 n\u00e0y, ch\u00fang t\u00f4i \u0111\u00e3 c\u00f3 nh\u1eefng khuy\u1ebfn ngh\u1ecb trong vi\u1ec7c ch\u1ebf bi\u1ebfn, b\u1ea3o qu\u1ea3n v\u00e0 s\u1eed d\u1ee5ng ch\u00fang. 8 lo\u00e0i: B\u00f4ng g\u00f2n, D\u00f3 tr\u1ea7m, G\u00e1o tr\u1eafng, L\u00e1t Mexico, Keo l\u00e1 tr\u00e0m, Keo tai t\u01b0\u1ee3ng, Keo lai, Xoan ta<\/em>c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u cho s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh, v\u00e1n MDF, v\u00e1n d\u00e1n ho\u1eb7c s\u1ea3n xu\u1ea5t gi\u1ea5y. 3 lo\u00e0i D\u1ea7u r\u00e1i, Sao \u0111en, Xoan m\u1ed9c c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng trong x\u00e2y d\u1ef1ng, c\u00f4ng nghi\u1ec7p t\u00e0u thuy\u1ec1n v\u00e0 \u0111\u1ed3 gia d\u1ee5ng. <\/p>\n

(K\u1ef7 y\u1ebfu H\u1ed9i ngh\u1ecb Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 L\u00e2m nghi\u1ec7p v\u1edbi ph\u00e1t tri\u1ec3n r\u1eebng b\u1ec1n v\u1eefng v\u00e0 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu, trang 406-411)<\/em> <\/p>\n

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

\nNghiên c\u1ee9u \u0111\u1eb7c tính c\u01a1 b\u1ea3n c\u1ee7a g\u1ed7 trong \u0111ó bao g\u1ed3m tính ch\u1ea5t g\u1ed7 và c\u1ea5u t\u1ea1o g\u1ed7 là r\u1ea5t quan tr\u1ecdng b\u1edfi nó liên quan ch\u1eb7t ch\u1ebd t\u1edbi ch\u1ebf bi\u1ebfn và s\u1eed d\u1ee5ng g\u1ed7. Nghiên c\u1ee9u v\u1ec1 khoa h\u1ecdc g\u1ed7 \u0111ã \u0111\u01b0\u1ee3c ti\u1ebfn hành t\u1eeb 50 n\u0103m tr\u01b0\u1edbc \u1edf m\u1ed9t s\u1ed1 vi\u1ec7n nghiên c\u1ee9u, \u0111\u1eb7c bi\u1ec7t là Vi\u1ec7n Khoa h\u1ecdc Lâm nghi\u1ec7p Vi\u1ec7t Nam. \u0110\u1ec1 tài “Nghiên c\u1ee9u c\u1ea5u t\u1ea1o và tính ch\u1ea5t c\u01a1 v\u1eadt lý c\u1ee7a m\u1ed9t s\u1ed1 loài g\u1ed7 và tre ch\u1ee7 y\u1ebfu \u1edf Vi\u1ec7t Nam làm c\u01a1 s\u1edf cho ch\u1ebf bi\u1ebfn, b\u1ea3o qu\u1ea3n và s\u1eed d\u1ee5ng” \u0111ã \u0111\u01b0\u1ee3c ti\u1ebfn hành t\u1eeb n\u0103m 2006 có n\u1ed9i dung quan tr\u1ecdng là t\u1ed5ng h\u1ee3p các nghiên c\u1ee9u \u0111ã có v\u1ec1 tính ch\u1ea5t c\u01a1 h\u1ecdc, v\u1eadt lý và c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu c\u1ee7a g\u1ed7. <\/span><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[11],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9651"}],"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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=9651"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9651\/revisions"}],"predecessor-version":[{"id":11104,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/9651\/revisions\/11104"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=9651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=9651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=9651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}