{"id":8647,"date":"2009-03-24T02:35:10","date_gmt":"2009-03-23T19:35:10","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/mot-so-tinh-chat-go-cua-melaleuca-leucadendra-melaleuca-cajuputi-melaleuca-viridiflora-va-dinh-hong-su-dung-go-cua-chung\/"},"modified":"2019-09-25T10:06:26","modified_gmt":"2019-09-25T03:06:26","slug":"mot-so-tinh-chat-go-cua-melaleuca-leucadendra-melaleuca-cajuputi-melaleuca-viridiflora-va-dinh-hong-su-dung-go-cua-chung","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/mot-so-tinh-chat-go-cua-melaleuca-leucadendra-melaleuca-cajuputi-melaleuca-viridiflora-va-dinh-hong-su-dung-go-cua-chung\/","title":{"rendered":"M\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t g\u1ed7 c\u1ee7a Melaleuca leucadendra, Melaleuca cajuputi, Melaleuca viridiflora v\u00e0 \u0111\u1ecbnh h\u1edbng s\u1eed d\u1ee5ng g\u1ed7 c\u1ee7a ch\u00fang"},"content":{"rendered":"

\u0110\u1ed7 V\u0103n B\u1ea3n<\/em><\/strong><\/p>\n

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

Tr\u00e0m l\u00e0 lo\u00e0i c\u00e2y th\u00e2n g\u1ed7 th\u00edch h\u1ee3p \u0111\u1ec3 tr\u1ed3ng tr\u00ean \u0111\u1ea5t chua ph\u00e8n \u1edf v\u00f9ng \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long. Ngo\u00e0i vi\u1ec7c s\u1eed d\u1ee5ng l\u00e0m c\u1ee7i, \u0111\u1ed1t than, l\u00e0m h\u00e0ng r\u00e0o, l\u00e0m v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng nh\u00e0 c\u1eeda \u0111\u01a1n gi\u1ea3n, g\u1ed7 Tr\u00e0m c\u00f2n l\u00e0m c\u1ecdc m\u00f3ng nh\u00e0 (c\u1eeb tr\u00e0m) r\u1ea5t \u0111\u00ad\u1ee3c \u00ada chu\u1ed9ng. V\u00e0i n\u0103m g\u1ea7n \u0111\u00e2y di\u1ec7n t\u00edch tr\u1ed3ng tr\u00e0m trong v\u00f9ng \u0111\u00e3 \u0111\u00ad\u1ee3c m\u1edf r\u1ed9ng v\u1edbi m\u1ee5c \u0111\u00edch ch\u00ednh l\u00e0 s\u1ea3n xu\u1ea5t c\u1eeb Tr\u00e0m. Trong t\u00ad\u01a1ng lai kh\u00f4ng xa, nhu c\u1ea7u v\u1ec1 c\u1eeb Tr\u00e0m ch\u1eafc ch\u1eafn s\u1ebd kh\u00f4ng c\u00f2n c\u1ea5p thi\u1ebft v\u00e0 s\u1ebd c\u00f3 m\u1ed9t l\u00ad\u1ee3ng g\u1ed7 tr\u00e0m d\u00ad th\u1eeba. Ch\u00ednh v\u00ec th\u1ebf vi\u1ec7c nghi\u00ean c\u1ee9u kh\u1ea3 n\u0103ng ch\u1ebf bi\u1ebfn, s\u1eed d\u1ee5ng g\u1ed7 Tr\u00e0m cho nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c duy tr\u00ec v\u00e0 ph\u00e1t tri\u1ec3n c\u00e2y Tr\u00e0m \u1edf \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long l\u00e0 c\u1ea7n thi\u1ebft.<\/p>\n

N\u0103m 2001, Ph\u00f2ng Nghi\u00ean c\u1ee9u T\u00e0i nguy\u00ean Th\u1ef1c v\u1eadt r\u1eebng thu\u1ed9c Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam \u0111\u00e3 h\u1ee3p t\u00e1c v\u1edbi JICA t\u1ed5 ch\u1ee9c nghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t g\u1ed7 c\u1ee7aba lo\u00e0i Tr\u00e0m tr\u00ean v\u1edbi m\u1ee5c ti\u00eau:<\/p>\n

– X\u00e2y d\u1ef1ng m\u1ed9t c\u01a1 s\u1edf khoa h\u1ecdc d\u1ef1a tr\u00ean c\u00e1c k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m \u0111\u1ec3 t\u00ecm hi\u1ec3u, \u0111\u00e1nh gi\u00e1 gi\u00e1 tr\u1ecb c\u1ee7a g\u1ed7 Tr\u00e0m;<\/p>\n

– Ph\u00e2n t\u00edch kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng theo c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c nhau c\u1ee7a c\u00e1c lo\u1ea1i g\u1ed7 Tr\u00e0m.<\/p>\n

1. \u0110\u1ed1i t\u00ad\u1ee3ng nghi\u00ean c\u1ee9u<\/h1>\n

\u0110\u1ed1i t\u00ad\u1ee3ng nghi\u00ean c\u1ee9u \u0111\u00ad\u1ee3c gi\u1edbi h\u1ea1n trong ph\u1ea1m vi ba lo\u00e0i Melaleuca leucadendra,<\/em> M. viridiflora<\/em> v\u00e0 M. cajuputi<\/em> c\u00f3 xu\u1ea5t x\u1ee9 kh\u00e1c nhau \u0111\u00ad\u1ee3c tr\u1ed3ng th\u00e0nh r\u1eebng t\u1ea1i x\u00e3 T\u00e2n L\u1eadp, huy\u1ec7n M\u1ed9c Ho\u00e1, t\u1ec9nh Long An. \u0110\u00e2y l\u00e0 nh\u1eefng khu r\u1eebng tr\u1ed3ng v\u1edbi m\u1ee5c \u0111\u00edch s\u1ea3n xu\u1ea5t c\u1eeb, c\u00f3 \u0111\u1ed9 tu\u1ed5i th\u1ea5p, k\u00edch th\u00ad\u1edbc c\u00e2y r\u1ea5t h\u1ea1n ch\u1ebf.<\/p>\n

T\u00ecnh h\u00ecnh \u0111\u1ed1i t\u00ad\u1ee3ng nghi\u00ean c\u1ee9u th\u00f4ng qua m\u1ed9t s\u1ed1 ch\u1ec9 ti\u00eau \u0111o \u0111\u1ebfm tr\u00ean nh\u1eefng c\u00e2y \u0111\u00ad\u1ee3c ch\u1ecdn th\u00ed nghi\u1ec7m th\u1ec3 hi\u1ec7n trong b\u1ea3ng 1 sau:<\/p>\n

B\u1ea3ng 1: K\u00edch th\u00ad\u1edbc trung b\u00ecnh c\u1ee7a c\u00e2y m\u1eabu<\/em><\/strong><\/p>\n\n\n\n\n\n\n\n
STT<\/strong><\/td>\nLo\u00e0i<\/strong><\/td>\nTu\u1ed5i<\/strong><\/p>\n

(n\u0103m)<\/strong><\/td>\n

\u0110\u00ad\u1eddng k\u00ednh d\u00ad1,3<\/sub> (cm)<\/strong><\/td>\nChi\u1ec1u cao th\u00e2n c\u00e2y h (m)<\/strong><\/td>\nChi\u1ec1u cao d\u00ad\u1edbi c\u00e0nh hdc (m)<\/strong><\/td>\n<\/tr>\n
C\u00f3 v\u1ecf<\/strong><\/td>\nKh\u00f4ng v\u1ecf<\/strong><\/td>\n<\/tr>\n
1<\/td>\nM. viridiflora<\/em><\/td>\n7<\/td>\n11.9<\/td>\n7.2<\/td>\n7.1<\/td>\n1.7<\/td>\n<\/tr>\n
2<\/td>\nM. leucadendra<\/em><\/td>\n7<\/td>\n11.8<\/td>\n7.6<\/td>\n7.0<\/td>\n2.0<\/td>\n<\/tr>\n
3<\/td>\nM. cajuputi<\/em><\/td>\n6<\/td>\n9.0<\/td>\n6.4<\/td>\n4.8<\/td>\n1.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2. N\u1ed9i dung v\u00e0 ph\u00ad\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/strong><\/p>\n

2.1. N\u1ed9i dung nghi\u00ean <\/em>c\u1ee9u:<\/em><\/h2>\n

Th\u00ed nghi\u1ec7m t\u1eadp trung v\u00e0o nh\u1eefng n\u1ed9i dung ch\u00ednh nh\u00ad sau:<\/p>\n

1) \u0110\u00e1nh gi\u00e1 chung v\u1ec1 g\u1ed7 (g\u1ed7 tr\u00f2n, g\u1ed7 x\u1ebb)<\/p>\n

2) X\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 v\u1eadt l\u00fd c\u1ee7a g\u1ed7<\/p>\n

3) X\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t ho\u00e1 h\u1ecdc c\u1ee7a g\u1ed7<\/p>\n

4) \u0110\u00e1nh gi\u00e1 gi\u00e1 tr\u1ecb v\u00e0 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7<\/p>\n

2.2. Ph\u00ad\u01a1ng ph\u00e1p nghi\u00ean <\/em>c\u1ee9u<\/em><\/h1>\n

\u00e3 Ch\u1ea5t l\u00ad\u1ee3ng c\u1ee7a g\u1ed7 tr\u00f2n, g\u1ed7 x\u1ebb \u0111\u00ad\u1ee3c \u0111\u00e1nh gi\u00e1 theo quan s\u00e1t nh\u1eadn \u0111\u1ecbnh tr\u00ean nh\u1eefng c\u00e2y \u0111\u00ad\u1ee3c l\u1ea5y l\u00e0m m\u1eabu;<\/p>\n

\u00e3 X\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 v\u1eadt l\u00fd v\u00e0 ho\u00e1 h\u1ecdc \u0111\u00ad\u1ee3c th\u1ef1c hi\u1ec7n theo c\u00e1c ti\u00eau chu\u1ea9n t\u00ad\u01a1ng \u1ee9ng.<\/p>\n

3. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u v\u1ec1 t\u00ednh ch\u1ea5t g\u1ed7<\/h1>\n

C\u00e1c s\u1ed1 li\u1ec7u th\u00ed nghi\u1ec7m \u0111\u00ad\u1ee3c ki\u1ec3m tra v\u00e0 x\u1eed l\u00fd theo ph\u00ad\u01a1ng ph\u00e1p th\u1ed1ng k\u00ea quy \u0111\u1ecbnh trong TCVN. Ph\u1ee5 l\u1ee5c 1 li\u1ec7t k\u00ea gi\u00e1 tr\u1ecb trung b\u00ecnh m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u01a1 v\u1eadt l\u00fd v\u00e0 ho\u00e1 h\u1ecdc c\u1ee7a c\u1ea3 ba lo\u00e0i Tr\u00e0m. K\u1ebft qu\u1ea3 v\u1ec1 x\u00e1c \u0111\u1ecbnh m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n ho\u00e1 h\u1ecdc c\u01a1 b\u1ea3n nh\u1ea5t c\u1ee7a g\u1ed7 \u0111\u00ad\u1ee3c t\u1eadp h\u1ee3p \u1edf ph\u1ee5 l\u1ee5c 2 v\u00e0 k\u1ebft qu\u1ea3 \u0111o \u0111\u1ebfm v\u1ec1 k\u00edch th\u00ad\u1edbc s\u1ee3i g\u1ed7 \u0111\u00ad\u1ee3c ghi trong ph\u1ee5 l\u1ee5c 3.<\/p>\n

\u0110\u1ec3 d\u1ec5 d\u00e0ng cho vi\u1ec7c \u0111\u00e1nh gi\u00e1 g\u1ed7 d\u1ef1a theo t\u00ednh ch\u1ea5t c\u1ee7a g\u1ed7, ch\u00fang t\u00f4i s\u1eed d\u1ee5ng c\u00e1c ti\u00eau ch\u00ed \u0111\u00ad\u1ee3c Ph\u00f2ng Nghi\u00ean c\u1ee9u T\u00e0i nguy\u00ean Th\u1ef1c v\u1eadt r\u1eebng s\u1eed d\u1ee5ng trong nghi\u00ean c\u1ee9u v\u1ec1 g\u1ed7 v\u00e0 c\u00f3 nh\u1eadn x\u00e9t chung cho c\u1ea3 3 lo\u1ea1i g\u1ed7 Tr\u00e0m nh\u00ad ghi trong ph\u1ee5 l\u1ee5c 4.<\/p>\n

4. Gi\u00e1 tr\u1ecb v\u00e0 kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7<\/h1>\n

4.1. Gi\u00e1 tr\u1ecb c\u1ee7a g\u1ed7:<\/em><\/h2>\n

– N\u00f3i chung Tr\u00e0m \u1edf \u0111\u1ed9 tu\u1ed5i 6, 7 n\u0103m \u0111\u00ad\u1ee3c x\u1ebfp v\u00e0o h\u1ea1ng g\u1ed7 c\u00f3 k\u00edch th\u00ad\u1edbc nh\u1ecf. Chi\u1ec1u d\u00e0i ph\u1ea7n th\u00e2n d\u00ad\u1edbi c\u00e0nh ng\u1eafn; th\u00e2n c\u00e2y g\u1ed7 cong nhi\u1ec1u chi\u1ec1u, c\u00e0nh m\u1eaft ph\u00e2n b\u1ed1 kh\u1eafp th\u00e2n c\u00e2y. Ch\u1ea5t l\u00ad\u1ee3ng g\u1ed7 tr\u00f2n c\u1ee7a Tr\u00e0m kh\u00f4ng th\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u00ad\u1ee3c b\u1eb1ng \u0111\u1ecbnh l\u00ad\u1ee3ng. D\u1ef1a tr\u00ean quan s\u00e1t ch\u00fang t\u00f4i th\u1ea5y ch\u1ea5t l\u00ad\u1ee3ng g\u1ed7 tr\u00f2n r\u1ea5t th\u1ea5p. Gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t c\u1ee7a g\u1ed7 tr\u00f2n c\u1ee7a Tr\u00e0m cho \u0111\u1ebfn nay l\u00e0 l\u00e0m c\u1eeb s\u1eed d\u1ee5ng trong v\u00f9ng \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long. Tr\u00e0m \u1edf \u0111\u1ed9 tu\u1ed5i v\u00e0 ch\u1ea5t l\u00ad\u1ee3ng g\u1ed7 tr\u00f2n nh\u00ad \u0111\u00e3 n\u00eau kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng v\u00e0o nh\u1eefng m\u1ee5c \u0111\u00edch kh\u00e1c nh\u00ad s\u1ea3n xu\u1ea5t g\u1ed7 x\u1ebb, g\u1ed7 x\u00e2y d\u1ef1ng,…<\/p>\n

– G\u1ed7 Tr\u00e0m thu\u1ed9c lo\u1ea1i g\u1ed7 n\u1eb7ng trung b\u00ecnh, t\u00ad\u01a1ng \u0111\u1ed1i m\u1ec1m, d\u1ec5 c\u00ada x\u1ebb, c\u1eaft g\u1ecdt (qua quan s\u00e1t trong qu\u00e1 tr\u00ecnh gia c\u00f4ng m\u1eabu), kh\u1ea3 n\u0103ng ng\u00e2m t\u1ea9m d\u1ec5 (t\u1ed1c \u0111\u1ed9 h\u00fat n\u00ad\u1edbc nhanh, m\u1ea1ch g\u1ed7 kh\u00f4ng c\u00f3 th\u1ec3 b\u00edt ho\u1eb7c ch\u1ea5t ch\u1ee9a), co r\u00fat \u00edt, d\u1ec5 s\u1ea5y (t\u1ed1c \u0111\u1ed9 h\u00fat \u1ea9m nhanh), m\u00e0u s\u1eafc l\u00f5i g\u1ed7 t\u00ad\u01a1ng \u0111\u1ed1i s\u00e1ng, m\u1eb7t g\u1ed7 t\u00ad\u01a1ng \u0111\u1ed1i m\u1ecbn, v\u00e2n g\u1ed7 trung b\u00ecnh. \u0110\u00e2y l\u00e0 nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m \u1ea3nh h\u00ad\u1edfng t\u00ad\u01a1ng \u0111\u1ed1i t\u1ed1t \u0111\u1ebfn gi\u00e1 tr\u1ecb g\u1ed7 tr\u00e0m.<\/p>\n

– Do g\u1ed7 c\u00f3 kh\u1ea3 n\u0103ng trao \u0111\u1ed5i \u1ea9m v\u1edbi m\u00f4i tr\u00ad\u1eddng xung quanh d\u1ec5 d\u00e0ng, t\u1ea1o m\u00f4i tr\u00ad\u1eddng thu\u1eadn l\u1ee3i cho c\u00f4n tr\u00f9ng v\u00e0 n\u1ea5m ph\u00e1 ho\u1ea1i, v\u00ec v\u1eady g\u1ed7 Tr\u00e0m c\u00f3 \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean kh\u00f4ng cao. \u0110\u00e2y l\u00e0 m\u1ed9t trong nhi\u1ec1u nguy\u00ean nh\u00e2n gi\u1ea3m gi\u00e1 tr\u1ecb c\u1ee7a g\u1ed7 Tr\u00e0m.<\/p>\n

4.2. Kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7 Tr\u00e0m<\/em><\/h2>\n

a)<\/em> S\u1eed d\u1ee5ng g\u1ed7 tr\u00f2n<\/em><\/p>\n

N\u1ebfu ch\u1ec9 x\u00e9t v\u1ec1 m\u1eb7t \u1ee9ng l\u1ef1c d\u1ef1a theo k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m tr\u00ean c\u00e1c m\u1eabu nh\u1ecf kh\u00f4ng khuy\u1ebft t\u1eadt so s\u00e1nh v\u1edbi m\u1ed9t s\u1ed1 ti\u00eau chu\u1ea9n, g\u1ed7 tr\u00f2n \u0111\u00ad\u1ee3c \u0111\u00e1nh gi\u00e1 nh\u00ad sau:<\/p>\n

– Theo TCVN 1072-71 v\u1ec1 \u1ee9ng l\u1ef1c c\u1ee7a g\u1ed7 d\u00f9ng trong x\u00e2y d\u1ef1ng v\u00e0 giao th\u00f4ng v\u1eadn t\u1ea3i, g\u1ed7 c\u1ee7a c\u1ea3 3 lo\u00e0i Tr\u00e0m c\u00f3 th\u1ec3 \u0111\u00ad\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m III (g\u1ed7 x\u00e2y d\u1ef1ng v\u00e0 giao th\u00f4ng v\u1eadn t\u1ea3i lo\u1ea1i trung b\u00ecnh \u0111\u1ebfn trung b\u00ecnh y\u1ebfu).<\/p>\n

– Theo TCVN 1077-71 v\u1ec1 g\u1ed7 tr\u00f2n d\u00f9ng ch\u1ed1ng l\u00f2 th\u00ec g\u1ed7 tr\u00f2n c\u1ee7a c\u1ea3 3 lo\u00e0i Tr\u00e0m \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng \u0111\u00ad\u1ee3c (k\u00edch th\u00ad\u1edbc v\u00e0 \u1ee9ng l\u1ef1c).<\/p>\n

– Kh\u1ea3 n\u0103ng ch\u1ecbu n\u00e9n d\u1ecdc, u\u1ed1n t\u0129nh, u\u1ed1n va \u0111\u1eadp, modul \u0111\u00e0n h\u1ed3i kh\u00f4ng cao; k\u00edch th\u00ad\u1edbc l\u1ea1i h\u1ebft s\u1ee9c h\u1ea1n ch\u1ebf, ch\u1ea5t l\u00ad\u1ee3ng k\u00e9m n\u00ean g\u1ed7 tr\u00f2n c\u1ee7a ba lo\u00e0i Tr\u00e0m kh\u00f4ng th\u00edch h\u1ee3p \u0111\u1ec3 l\u00e0m c\u1ed9t \u0111i\u1ec7n, c\u1ed9t bu\u1ed3m, l\u00e0m c\u00e1c k\u1ebft c\u1ea5u ho\u1eb7c d\u1ee5ng c\u1ee5 lu\u00f4n ph\u1ea3i ch\u1ee5i l\u1ef1c cao (c\u1ea7u thang, c\u00e1n cu\u1ed1c x\u1ebbng, d\u1ee5ng c\u1ee5 th\u1ec3 thao, thuy\u1ec1n\u2026).<\/p>\n

b)<\/em> S\u1eed d\u1ee5ng g\u1ed7 trong s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c<\/em><\/h2>\n

Quan s\u00e1t qu\u00e1 tr\u00ecnh gia c\u00f4ng m\u1eabu th\u00ed nghi\u1ec7m v\u00e0 nh\u1eefng thanh g\u1ed7 x\u1ebb d\u00f9ng \u0111\u1ec3 gia c\u00f4ng m\u1eabu th\u00ed nghi\u1ec7m ta c\u00f3 nh\u1eadn x\u00e9t: g\u1ed7 c\u1ee7a c\u1ea3 ba lo\u00e0i Tr\u00e0m tr\u00ean c\u00f3 nhi\u1ec1u \u0111\u1eb7c t\u00ednh t\u00ad\u01a1ng \u0111\u1ed1i \u00adu vi\u1ec7t nh\u00ad d\u1ec5 c\u1eaft g\u1ecdt, c\u00ada x\u1ebb; \u0111\u1ed9 co r\u00fat d\u00e3n n\u1edf \u00edt; kh\u1ea3 n\u0103ng n\u1ee9t v\u1eeba; m\u00e0u s\u1eafc t\u00ad\u01a1ng \u0111\u1ed1i s\u00e1ng; th\u1edb g\u1ed7 t\u00ad\u01a1ng \u0111\u1ed1i th\u1eb3ng, v\u00e2n g\u1ed7 trung b\u00ecnh. V\u00ec v\u1eady g\u1ed7 Tr\u00e0m ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c th\u00f4ng d\u1ee5ng v\u00e0 k\u1ec3 c\u1ea3 \u0111\u1ed3 m\u1ed9c cao c\u1ea5p, trang tr\u00ed n\u1ed9i th\u1ea5t, l\u00e0m v\u00e1ch ng\u0103n, \u0111\u00f3ng tr\u1ea7n nh\u00e0…<\/p>\n

c)<\/em> S\u1eed d\u1ee5ng g\u1ed7 l\u00e0m v\u00e1n s\u00e0n<\/em><\/p>\n

\u0110\u1ed9 c\u1ee9ng t\u0129nh c\u1ee7a g\u1ed7 Tr\u00e0m t\u1eeb c\u1ee9ng trung b\u00ecnh \u0111\u1ebfn kh\u00e1 c\u1ee9ng, n\u00ean g\u1ed7 c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u00e0m v\u00e1n s\u00e0n v\u1edbi \u0111\u00f2i h\u1ecfi ch\u1ea5t l\u00ad\u1ee3ng kh\u00f4ng cao l\u1eafm (th\u00edch h\u1ee3p nh\u1ea5t l\u00e0 l\u00e0m v\u00e1n s\u00e0n theo m\u1eb7t c\u1eaft ngang).<\/p>\n

d)<\/em> S\u1eed d\u1ee5ng g\u1ed7 trong s\u1ea3n xu\u1ea5t v\u00e1n nh\u00e2n t\u1ea1o<\/em><\/p>\n

– G\u1ed7 Tr\u00e0m t\u00ad\u01a1ng \u0111\u1ed1i m\u1ec1m, d\u1ec5 x\u1ebb, m\u1ea1ch g\u1ed7 ph\u00e2n t\u00e1n, co r\u00fat \u00edt, \u0111\u1ed9 \u1ea9m b\u00e3o ho\u00e0 th\u1edb g\u1ed7 th\u1ea5p, do v\u1eady c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n gh\u00e9p thanh ph\u1ee5c v\u1ee5 cho s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c, x\u00e2y d\u1ef1ng,\u2026<\/p>\n

– G\u1ed7 Tr\u00e0m c\u00f3 m\u1ea1ch ph\u00e2n t\u00e1n, kh\u00f4ng c\u00f3 th\u1ec3 b\u00edt; t\u1ed1c \u0111\u1ed9 h\u00fat n\u00ad\u1edbc nhanh; g\u1ed7 t\u00ad\u01a1ng \u0111\u1ed1i m\u1ec1m n\u00ean c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t g\u1ed7 n\u00e9n c\u00f3 keo ho\u1eb7c kh\u00f4ng keo.<\/p>\n

– G\u1ed7 Tr\u00e0m t\u00ad\u01a1ng \u0111\u1ed1i nh\u1eb9 n\u00ean c\u00f3 th\u1ec3 th\u00edch h\u1ee3p \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n s\u1ee3i kh\u00f4, v\u00e1n MDF.<\/p>\n

– V\u1ec1 kh\u1ea3 n\u0103ng l\u00e0m nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n d\u0103m g\u1ed7, g\u1ed7 Tr\u00e0m ho\u00e0n to\u00e0n ph\u00f9 h\u1ee3p do m\u00e0u s\u1eafc s\u00e1ng, \u0111\u1ed9 b\u1ec1n khi tr\u00ad\u1ee3t d\u1ecdc th\u1edb trung b\u00ecnh, s\u1ee9c ch\u1ed1ng t\u00e1ch th\u1ea5p, kh\u1ed1i l\u00ad\u1ee3ng th\u1ec3 t\u00edch nh\u1eb9 \u0111\u1ebfn trung b\u00ecnh, \u0111\u1ed9 co r\u00fat th\u1ea5p, kh\u1ea3 n\u0103ng n\u1ee9t trung b\u00ecnh, \u0111\u00ad\u1eddng k\u00ednh g\u1ed7 tr\u00f2n ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u t\u1ed1i thi\u1ec3u c\u1ee7a m\u00e1y b\u0103m d\u0103m.<\/p>\n

– Do l\u1ef1c tr\u00ad\u1ee3t d\u1ecdc v\u00e0 t\u00e1ch d\u1ecdc th\u1ea5p, m\u1ea1ch g\u1ed7 ph\u00e2n t\u00e1n v\u00e0 s\u1ed1 l\u00ad\u1ee3ng m\u1ea1ch t\u00ad\u01a1ng \u0111\u1ed1i \u00edt n\u00ean g\u1ed7 Tr\u00e0m c\u00f3 th\u1ec3 b\u00f3c \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00e1n d\u00e1n ho\u1eb7c l\u00e0m v\u00e1n d\u00e1n ph\u1ee7.<\/p>\n

– Th\u00e0nh ph\u1ea7n cellulose th\u1ea5p, k\u00edch th\u00ad\u1edbc s\u1ee3i g\u1ed7 thu\u1ed9c lo\u1ea1i trung b\u00ecnh, v\u00e1ch s\u1ee3i m\u1ecfng n\u00ean g\u1ed7 Tr\u00e0m c\u00f3 th\u1ec3 \u0111\u00ad\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m g\u1ed7 nguy\u00ean li\u1ec7u gi\u1ea5y s\u1ee3i lo\u1ea1i C (k\u00e9m).<\/p>\n

5. K\u1ebft lu\u1eadn<\/h1>\n

a) S\u1ef1 ch\u00eanh l\u1ec7ch v\u1ec1 gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a c\u00e1c t\u00ednh ch\u1ea5t g\u1ed7 gi\u1eefa ba lo\u00e0i Tr\u00e0m kh\u00f4ng \u0111\u00e1ng k\u1ec3 ch\u1ee9ng t\u1ecf gi\u00e1 tr\u1ecb c\u1ee7a g\u1ed7 ba lo\u00e0i tr\u00e0m t\u00ad\u01a1ng t\u1ef1 nh\u00ad nhau.<\/p>\n

b) G\u1ed7 Tr\u00e0m ngo\u00e0i vi\u1ec7c s\u1eed d\u1ee5ng l\u00e0m c\u1ecdc \u0111\u00f3ng m\u00f3ng nh\u00e0 r\u1ea5t hi\u1ec7u qu\u1ea3, c\u00f2n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng cho nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c nhau. Khi s\u1eed d\u1ee5ng g\u1ed7 tr\u00e0m c\u1ea7n ch\u00fa tr\u1ecdng \u0111\u1ebfn vi\u1ec7c b\u1ea3o qu\u1ea3n g\u1ed7 \u0111\u1ec3 n\u00e2ng cao \u0111\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean.<\/p>\n

c) K\u00edch th\u00ad\u1edbc c\u00e2y g\u1ed7, ch\u1ea5t l\u00ad\u1ee3ng g\u1ed7 tr\u00f2n l\u00e0 \u0111i\u1ec1u \u0111\u00e1ng quan t\u00e2m nh\u1ea5t. N\u1ebfu mu\u1ed1n m\u1edf r\u1ed9ng kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng g\u1ed7 Tr\u00e0m v\u00e0o nh\u1eefng m\u1ee5c \u0111\u00edch kh\u00e1c nh\u00ad \u0111\u00e3 n\u00eau \u1edf tr\u00ean th\u00ec nh\u1ea5t thi\u1ebft ph\u1ea3i c\u00f3 nh\u1eefng bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh t\u00e1c \u0111\u1ed9ng \u0111\u1ec3 \u00edt nh\u1ea5t c\u00f3 \u0111\u00ad\u1ee3c nh\u1eefng c\u00e2y g\u1ed7 c\u00f3 k\u00edch th\u00ad\u1edbc l\u1edbn h\u01a1n.<\/p>\n

d) X\u00e1c \u0111\u1ecbnh tu\u1ed5i th\u00e0nh th\u1ee5c t\u1ef1 nhi\u00ean v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a tr\u00e0m c\u0169ng nh\u00ad ti\u1ebfp t\u1ee5c nghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t g\u1ed7 tr\u00e0m \u1edf c\u00e1c c\u1ea5p tu\u1ed5i cao h\u01a1n l\u00e0 vi\u1ec7c h\u1ebft s\u1ee9c c\u1ea7n thi\u1ebft v\u00e0 c\u00f3 \u00fd ngh\u0129a trong vi\u1ec7c ph\u00e1t tri\u1ec3n m\u1edf r\u1ed9ng r\u1eebng tr\u00e0m trong v\u00f9ng \u0111\u1ea5t chua ph\u00e8n \u1edf \u0110\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o <\/strong><\/p>\n

1. Peter Niemz<\/p>\n

Holz. Anatomie \u2013 Chemie \u2013 Physik<\/p>\n

Physik des Holzes und der Holzwerkstoffe<\/p>\n

Dresden, 1994<\/p>\n

2. Lutz Juergen Harzmann<\/p>\n

Kurzer Grundriss der Allgemeinen Tropenholzkunde<\/p>\n

S. Hirzel Verlag Leipzig, 1995<\/p>\n

3. T\u00ad li\u1ec7u c\u1ee7a Ph\u00f2ng nghi\u00ean c\u1ee9u T\u00e0i nguy\u00ean Th\u1ef1c v\u1eadt r\u1eebng<\/p>\n

SUMMARY<\/strong><\/p>\n

Melaleuca leucadendra, Melaleuca cajuputi <\/em>and Melaleuca viridiflora<\/em> are the three species of the Myrtaceae family, in which M.cajuputi<\/em> is a native species and the others are exotic species from Australia. They were planted in 1994, 1995 on the acid sulfate soils in Thuy Tan commune, Thanh Hoa district, Long An province.<\/p>\n

A main cause of why this wood is not much desired is the lack of knowledge about this wood. Research on wood characteristics would contribute to evaluating possible uses of this wood. The Forest Plant Resources Division of the Forest Science Institute of Vietnam was in cooperation with JICA to carry out the project “Research on wood characteristics, evaluation and usability of three Melaleuca species” in 2001. The project provided the scientific base for wood assessment of Melaleuca depending on wood characteristics (physical \u2013 mechanical properties, main chemical contents of wood) and analyzed the wood ability for different purposes of using based on studies of wood characteristics.<\/p>\n

Ph\u1ee5 l\u1ee5c 1 <\/strong><\/p>\n

T\u1ed5ng h\u1ee3p k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m v\u1ec1 t\u00ednh ch\u1ea5t c\u01a1 v\u1eadt l\u00fd c\u1ee7a g\u1ed7 3 lo\u00e0i Tr\u00e0m<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
TT<\/strong><\/td>\n\n

<\/h4>\n

T\u00ddnh ch\u00cat<\/u><\/h4>\n<\/td>\n

Lo\u00b5i<\/strong><\/td>\n<\/tr>\n
M. viridiflora<\/em><\/strong><\/td>\nM. leucadendra<\/em><\/strong><\/td>\nM. cajuputi<\/em><\/strong><\/td>\n<\/tr>\n
T\u00ednh ch\u1ea5t v\u1eadt l\u00fd<\/strong><\/td>\n<\/tr>\n
1<\/td>\nKh\u1ed1i l\u00ad\u1ee3ng th\u1ec3 t\u00edch \u1edf \u0111\u1ed9 \u1ea9m 0%, (kg\/m3<\/sup>)<\/td>\n647<\/td>\n696<\/td>\n610<\/td>\n<\/tr>\n
2<\/td>\nKh\u1ed1i l\u00ad\u1ee3ng th\u1ec3 t\u00edch \u1edf \u0111\u1ed9 \u1ea9m 12%, (kg\/m3<\/sup>)<\/td>\n681<\/td>\n726<\/td>\n641<\/td>\n<\/tr>\n
3<\/td>\n\u0110\u1ed9 co r\u00fat xuy\u00ean t\u00e2m, (%)<\/td>\n4.4<\/td>\n5.3<\/td>\n4.4<\/td>\n<\/tr>\n
4<\/td>\n\u0110\u1ed9 co r\u00fat ti\u1ebfp tuy\u1ebfn, (%)<\/td>\n6.2<\/td>\n7.6<\/td>\n6.8<\/td>\n<\/tr>\n
5<\/td>\n\u0110\u1ed9 co r\u00fat th\u1ec3 t\u00edch, (%)<\/td>\n11.8<\/td>\n14.5<\/td>\n12.6<\/td>\n<\/tr>\n
6<\/td>\nH\u1ec7 s\u1ed1 co r\u00fat xuy\u00ean t\u00e2m, (%)<\/td>\n0.05<\/td>\n0.06<\/td>\n0.04<\/td>\n<\/tr>\n
7<\/td>\nH\u1ec7 s\u1ed1 co r\u00fat ti\u1ebfp tuy\u1ebfn, (%)<\/td>\n0.07<\/td>\n0.09<\/td>\n0.06<\/td>\n<\/tr>\n
8<\/td>\nH\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch, (%)<\/td>\n0.13<\/td>\n0.17<\/td>\n0.10<\/td>\n<\/tr>\n
9<\/td>\n\u0110\u00f4 h\u00fat \u1ea9m, (%)<\/td>\n25.9<\/td>\n26.1<\/td>\n28.0<\/td>\n<\/tr>\n
10<\/td>\n\u0110\u1ed9 h\u00fat n\u00ad\u1edbc, (%)<\/td>\n100<\/td>\n96<\/td>\n124<\/td>\n<\/tr>\n
11<\/td>\n\u0110i\u1ec3m b\u00e3o ho\u00e0 th\u1edb g\u1ed7, (%)<\/td>\n25.9<\/td>\n26.1<\/td>\n28.0<\/td>\n<\/tr>\n
12<\/td>\n\u0110\u1ed9 d\u00e3n n\u1edf xuy\u00ean t\u00e2m, (%)<\/td>\n4.1<\/td>\n4.9<\/td>\n4.6<\/td>\n<\/tr>\n
13<\/td>\n\u0110\u1ed9 d\u00e3n n\u1edf ti\u1ebfp tuy\u1ebfn, (%)<\/td>\n7.0<\/td>\n8.4<\/td>\n9.0<\/td>\n<\/tr>\n
14<\/td>\nH\u1ec7 s\u1ed1 d\u00e3n n\u1edf xuy\u00ean t\u00e2m, (%)<\/td>\n0.14<\/td>\n0.16<\/td>\n0.15<\/td>\n<\/tr>\n
15<\/td>\nH\u1ec7 s\u1ed1 d\u00e3n n\u1edf ti\u1ebfp tuy\u1ebfn, (%)<\/td>\n0.23<\/td>\n0.28<\/td>\n0.30<\/td>\n<\/tr>\n
T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/strong><\/td>\n<\/tr>\n
1<\/td>\nN\u00e9n d\u1ecdc th\u1edb, (kgf\/cm2<\/sup>)<\/td>\n511<\/td>\n537<\/td>\n465<\/td>\n<\/tr>\n
2<\/td>\nN\u00e9n ngang c\u1ee5c b\u1ed9 xuy\u00ean t\u00e2m, (kgf\/cm2<\/sup>)<\/td>\n123<\/td>\n128<\/td>\n111<\/td>\n<\/tr>\n
3<\/td>\nN\u00e9n ngang c\u1ee5c b\u1ed9 ti\u1ebfp tuy\u1ebfn, (kgf\/cm2<\/sup>)<\/td>\n110<\/td>\n115<\/td>\n97<\/td>\n<\/tr>\n
4<\/td>\nK\u00e9o d\u1ecdc th\u1edb, (kgf\/cm2<\/sup>)<\/td>\n812<\/td>\n906<\/td>\n798<\/td>\n<\/tr>\n
5<\/td>\nU\u1ed1n t\u0129nh xuy\u00ean t\u00e2m, (kgf\/cm2<\/sup>)<\/td>\n1121<\/td>\n1209<\/td>\n950<\/td>\n<\/tr>\n
6<\/td>\nU\u1ed1n t\u0129nh ti\u1ebfp tuy\u1ebfn, (kgf\/cm2<\/sup>)<\/td>\n1081<\/td>\n1192<\/td>\n1008<\/td>\n<\/tr>\n
7<\/td>\nU\u1ed1n va \u0111\u1eadp xuy\u00ean t\u00e2m, (kgfm\/cm3<\/sup>)<\/td>\n0.30<\/td>\n0.49<\/td>\n0.33<\/td>\n<\/tr>\n
8<\/td>\nU\u1ed1n va \u0111\u1eadp ti\u1ebfp tuy\u1ebfn, (kgfm\/cm3<\/sup>)<\/td>\n0.34<\/td>\n0.49<\/td>\n0.39<\/td>\n<\/tr>\n
9<\/td>\nTr\u00ad\u1ee3t d\u1ecdc m\u1eb7t xuy\u00ean t\u00e2m, (kgf\/cm2<\/sup>)<\/td>\n111<\/td>\n126<\/td>\n105<\/td>\n<\/tr>\n
10<\/td>\nTr\u00ad\u1ee3t d\u1ecdc m\u1eb7t ti\u1ebfp tuy\u1ebfn, (kgf\/cm2<\/sup>)<\/td>\n116<\/td>\n102<\/td>\n102<\/td>\n<\/tr>\n
11<\/td>\nT\u00e1ch d\u1ecdc m\u1eb7t ti\u1ebfp tuy\u1ebfn, (kgf\/cm)<\/td>\n12.7<\/td>\n14.0<\/td>\n14.7<\/td>\n<\/tr>\n
12<\/td>\nT\u00e1ch d\u1ecdc m\u1eb7t xuy\u00ean t\u00e2m, (kgf\/cm)<\/td>\n14.8<\/td>\n15.2<\/td>\n15.7<\/td>\n<\/tr>\n
13<\/td>\nC\u1ee9ng t\u0129nh d\u1ecdc th\u1edb, (kgf\/cm2<\/sup>)<\/td>\n841<\/td>\n749<\/td>\n617<\/td>\n<\/tr>\n
14<\/td>\nC\u1ee9ng t\u0129nh xuy\u00ean t\u00e2m, (kgf\/cm2<\/sup>)<\/td>\n739<\/td>\n703<\/td>\n555<\/td>\n<\/tr>\n
15<\/td>\nC\u1ee9ng t\u0129nh ti\u1ebfp tuy\u1ebfn, (kgf\/cm2<\/sup>)<\/td>\n679<\/td>\n605<\/td>\n499<\/td>\n<\/tr>\n
16<\/td>\nModun \u0111\u00e0n h\u1ed3i khi u\u1ed1n t\u0129nh h\u00ad\u1edbng xuy\u00ean t\u00e2m, (x1000 kgf\/cm2<\/sup>)<\/td>\n116<\/td>\n141<\/td>\n109<\/td>\n<\/tr>\n
17<\/td>\nModun \u0111\u00e0n h\u1ed3i khi u\u1ed1n t\u0129nh h\u00ad\u1edbng ti\u1ebfp tuy\u1ebfn, (x1000 kgf\/cm2<\/sup>)<\/td>\n109<\/td>\n142<\/td>\n126<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ph\u00f4 l\u00f4c 2 <\/strong><\/p>\n

T\u00e6ng h\u00eep k\u00d5t qu\u00b6 th\u00dd nghi\u00d6m v\u00d2 t\u00ddnh ch\u00cat ho\u00b8 h\u00e4c c\u00f1a 3 lo\u00b5i Tr\u00b5m<\/u><\/h4>\n\n\n\n\n\n\n\n
Lo\u00b5i<\/strong><\/td>\nTh\u00b5nh ph\u00c7n, %<\/td>\n<\/tr>\n
Tan trong <\/strong><\/p>\n

n\u00ad\u00edc n\u00e3ng<\/strong><\/td>\n

Tan trong <\/strong><\/p>\n

c\u00e5n<\/strong><\/td>\n

Tro<\/strong><\/td>\nLicnin<\/strong><\/td>\nHolo<\/strong><\/p>\n

Xenlulo<\/strong><\/p>\n

za<\/strong><\/td>\n

Xenlu<\/strong><\/p>\n

loza<\/strong><\/td>\n

Pento<\/strong><\/p>\n

za<\/strong><\/td>\n<\/tr>\n

M. viridiflora<\/em><\/td>\n2.15<\/td>\n1.47<\/td>\n0.75<\/td>\n25.2<\/td>\n66.8<\/td>\n43.5<\/td>\n22.3<\/td>\n<\/tr>\n
M. leucadendra<\/em><\/td>\n2.33<\/td>\n1.18<\/td>\n0.80<\/td>\n23.4<\/td>\n68.2<\/td>\n43.6<\/td>\n23.9<\/td>\n<\/tr>\n
M. cajuputi<\/em><\/td>\n1.99<\/td>\n1.24<\/td>\n0.74<\/td>\n24.1<\/td>\n68.6<\/td>\n42.9<\/td>\n23.8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ph\u00f4 l\u00f4c 3: <\/strong><\/p>\n

T\u00e6ng h\u00eep k\u00d5t qu\u00b6 \u00aeo x\u00b8c \u00ae\u00denh chi\u00d2u d\u00b5i, \u00ae\u00ad\u00eang k\u00ddnh ngo\u00b5i v\u00b5 \u00ae\u00ad\u00eang k\u00ddnh khoang s\u00eei g\u00e7 c\u00f1a 3 lo\u00b5i Tr\u00b5m<\/strong><\/p>\n\n\n\n\n\n\n
\n

Lo\u00b5i<\/u><\/h4>\n<\/td>\n

l<\/strong><\/p>\n

mm)<\/em><\/strong><\/td>\n

d1<\/strong><\/p>\n

mm)<\/em><\/strong><\/td>\n

d2<\/strong><\/p>\n

mm)<\/em><\/strong><\/td>\n<\/tr>\n

M. viridiflora<\/em><\/td>\n963<\/td>\n21<\/td>\n13<\/td>\n<\/tr>\n
M. leucadendra<\/em><\/td>\n1099<\/td>\n24<\/td>\n13<\/td>\n<\/tr>\n
M. cajuputi<\/em><\/td>\n1062<\/td>\n22<\/td>\n11<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Ghi ch\u00f3:<\/em> l – Chi\u00d2u d\u00b5i s\u00eei g\u00e7<\/p>\n

d1 – \u00a7\u00ad\u00eang k\u00ddnh ngo\u00b5i s\u00eei g\u00e7<\/p>\n

d2 – \u00a7\u00ad\u00eang k\u00ddnh khoang s\u00eei g\u00e7<\/p>\n

Ph\u00f4 l\u00f4c 4 \u00a7\u00b8nh gi\u00b8 k\u00d5t qu\u00b6 th\u00dd nghi\u00d6m v\u00d2 m\u00e9t s\u00e8 t\u00ddnh ch\u00cat g\u00e7 3 lo\u00b5i Tr\u00b5m<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Kh\u00b6 n\u00a8ng h\u00f3t \u00c8m (%)<\/td>\nR\u00cat th\u00cap<\/p>\n

<25<\/td>\n

Th\u00cap<\/p>\n

25-30<\/td>\n

Trung b\u00d7nh<\/p>\n

30-35<\/td>\n

Cao<\/p>\n

35-45<\/td>\n

R\u00cat cao<\/p>\n

>45<\/td>\n<\/tr>\n

\n

A B C<\/u><\/h4>\n<\/td>\n<\/tr>\n

Kh\u00b6 n\u00a8ng co r\u00f3t (%)<\/td>\nCo r\u00f3t \u00ddt<\/p>\n

<0,35<\/td>\n

Co r\u00f3t v\u00f5a<\/p>\n

0,35-0,55<\/td>\n

Co r\u00f3t kh\u00b8<\/p>\n

0,55-0,75<\/td>\n

Co r\u00f3t nhi\u00d2u<\/p>\n

>0,75<\/td>\n<\/tr>\n

\n

A B C<\/u><\/h4>\n<\/td>\n<\/tr>\n

Kh\u00b6 n\u00a8ng n\u00f8t (\u00ae\u00e9 co r\u00f3t th\u00d3 t\u00ddch to\u00b5n ph\u00c7n,%)<\/td>\nN\u00f8t \u00ddt (<10)<\/td>\nN\u00f8t v\u00f5a (10-15)<\/td>\nD\u00d4 n\u00f8t (>15)<\/td>\n<\/tr>\n
\n

A B C<\/u><\/h4>\n<\/td>\n<\/tr>\n

Kh\u00e8i l\u00ad\u00eeng th\u00d3 t\u00ddch (g\/cm3<\/sup>)<\/td>\nR\u00cat nh\u00d1<\/p>\n

<0,50<\/td>\n

Nh\u00d1<\/p>\n

0,50-0,65<\/td>\n

Trung b\u00d7nh<\/p>\n

0,65-0,80<\/td>\n

N\u00c6ng<\/p>\n

0,80-0,95<\/td>\n

R\u00cat n\u00c6ng<\/p>\n

>0,95<\/td>\n<\/tr>\n

C<\/strong><\/td>\nA B<\/strong><\/td>\n<\/tr>\n
Gi\u00edi h\u00b9n b\u00d2n khi n\u00d0n d\u00e4c (kgf\/cm2<\/sup>)<\/td>\nY\u00d5u (<450)<\/td>\nTrung b\u00d7nh (450-750)<\/td>\nKho\u00ce (>750)<\/td>\n<\/tr>\n
\n

A B C<\/u><\/h4>\n<\/td>\n<\/tr>\n

Gi\u00edi h\u00b9n b\u00d2n khi k\u00d0o d\u00e4c (kgf\/cm2<\/sup>)<\/td>\nR\u00cat th\u00cap<\/p>\n

<600<\/td>\n

Th\u00cap<\/p>\n

600-800<\/td>\n

Trung b\u00d7nh<\/p>\n

800-1000<\/td>\n

Cao<\/p>\n

1000-1200<\/td>\n

Kh\u00b8 cao<\/p>\n

1200-1500<\/td>\n

R\u00cat cao<\/p>\n

>1500<\/td>\n<\/tr>\n

C<\/strong><\/td>\nA B<\/strong><\/td>\n<\/tr>\n
Gi\u00edi h\u00b9n b\u00d2n khi u\u00e8n t\u00dcnh (kgf\/cm2<\/sup>)<\/td>\nY\u00d5u<\/p>\n

<1100<\/td>\n

Trung b\u00d7nh<\/p>\n

1100-1800<\/td>\n

Kho\u00ce<\/p>\n

>1800<\/td>\n<\/tr>\n

A C<\/strong><\/td>\nB<\/strong><\/td>\n<\/tr>\n
\u00a7\u00e9 b\u00d2n khi u\u00e8n va \u00ae\u00cbp (kgf\/cm3<\/sup>)<\/td>\nR\u00cat th\u00cap<\/p>\n

<0,2<\/td>\n

Th\u00cap<\/p>\n

0,2-0,3<\/td>\n

Trung b\u00d7nh<\/p>\n

0,3-0,4<\/td>\n

Cao<\/p>\n

0,4-0,6<\/td>\n

R\u00cat cao<\/p>\n

>0,6<\/td>\n<\/tr>\n

A C<\/strong><\/td>\nB<\/strong><\/td>\n<\/tr>\n
Gi\u00edi h\u00b9n b\u00d2n khi tr\u00ad\u00eet d\u00e4c (kgf\/cm2<\/sup>)<\/td>\nR\u00cat th\u00cap<\/p>\n

<50<\/td>\n

Th\u00cap<\/p>\n

50-100<\/td>\n

Trung b\u00d7nh<\/p>\n

100-200<\/td>\n

Cao<\/p>\n

>200<\/td>\n<\/tr>\n

A B C<\/strong><\/td>\n<\/tr>\n
S\u00f8c ch\u00e8ng t\u00b8ch (kgf\/cm)<\/td>\nR\u00cat th\u00cap<\/p>\n

<10<\/td>\n

Th\u00cap<\/p>\n

10-15<\/td>\n

Trung b\u00d7nh<\/p>\n

15-20<\/td>\n

Cao<\/p>\n

20-25<\/td>\n

R\u00cat cao<\/p>\n

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

\n

A B C<\/u><\/h4>\n<\/td>\n<\/tr>\n

\u00a7\u00e9 c\u00f8ng t\u00dcnh (kgf\/cm2<\/sup>)<\/td>\nR\u00cat m\u00d2m<\/p>\n

<200<\/td>\n

M\u00d2m<\/p>\n

201-350<\/td>\n

T\u00ad\u00acng \u00ae\u00e8i<\/p>\n

351-500<\/td>\n

Trung b\u00d7nh<\/p>\n

501-650<\/td>\n

Kh\u00b8 c\u00f8ng<\/p>\n

651-1000<\/td>\n

R\u00cat c\u00f8ng<\/p>\n

>1001<\/td>\n<\/tr>\n

C<\/strong><\/td>\nA B<\/strong><\/td>\n<\/tr>\n
Modul \u00ae\u00b5n h\u00e5i (1000 kgf\/cm2<\/sup>)<\/td>\nR\u00cat th\u00cap<\/p>\n

<100<\/td>\n

Th\u00cap<\/p>\n

100-120<\/td>\n

Trung b\u00d7nh<\/p>\n

120-150<\/td>\n

Cao<\/p>\n

150-200<\/td>\n

R\u00cat cao<\/p>\n

>200<\/td>\n<\/tr>\n

A C<\/strong><\/td>\nB<\/strong><\/td>\n<\/tr>\n
H\u00b5m l\u00ad\u00eeng cellulose (%)<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Tràm là loài cây thân g\u1ed7 thích h\u1ee3p \u0111\u1ec3 tr\u1ed3ng trên \u0111\u1ea5t chua phèn \u1edf vùng \u0111\u1ed3ng b\u1eb1ng sông C\u1eedu Long. Ngoài vi\u1ec7c s\u1eed d\u1ee5ng làm c\u1ee7i, \u0111\u1ed1t than, làm hàng rào, làm v\u1eadt li\u1ec7u xây d\u1ef1ng nhà c\u1eeda \u0111\u01a1n gi\u1ea3n, g\u1ed7 Tràm còn làm c\u1ecdc móng nhà (c\u1eeb tràm) r\u1ea5t \u0111­\u1ee3c ­a chu\u1ed9ng. Vài n\u0103m g\u1ea7n \u0111ây di\u1ec7n tích tr\u1ed3ng tràm trong vùng \u0111ã \u0111­\u1ee3c m\u1edf r\u1ed9ng v\u1edbi m\u1ee5c \u0111ích chính là s\u1ea3n xu\u1ea5t c\u1eeb Tràm. Trong t­\u01a1ng lai không xa, nhu c\u1ea7u v\u1ec1 c\u1eeb Tràm ch\u1eafc ch\u1eafn s\u1ebd không còn c\u1ea5p thi\u1ebft và s\u1ebd có m\u1ed9t l­\u1ee3ng g\u1ed7 tràm d­ th\u1eeba. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8647"}],"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=8647"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8647\/revisions"}],"predecessor-version":[{"id":19271,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8647\/revisions\/19271"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8647"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8647"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}