{"id":13664,"date":"2014-09-18T14:03:59","date_gmt":"2014-09-18T07:03:59","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=13664"},"modified":"2014-08-29T14:10:54","modified_gmt":"2014-08-29T07:10:54","slug":"bao-cao-tom-tat-de-tai-nghien-cuu-tinh-chat-co-vat-ly-va-giai-phau-cua-mot-so-loai-go-va-tre-thong-dung-o-viet-nam-lam-co-so-cho-che-bien-bao-quan-va-su-dung","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-tom-tat-de-tai-nghien-cuu-tinh-chat-co-vat-ly-va-giai-phau-cua-mot-so-loai-go-va-tre-thong-dung-o-viet-nam-lam-co-so-cho-che-bien-bao-quan-va-su-dung\/","title":{"rendered":"B\u00e1o c\u00e1o t\u00f3m t\u1eaft \u0111\u1ec1 t\u00e0i: Nghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t c\u01a1, v\u1eadt l\u00fd v\u00e0 gi\u1ea3i ph\u1eabu c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i g\u1ed7 v\u00e0 tre th\u00f4ng d\u1ee5ng \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."},"content":{"rendered":"

I.<\/b> \u0110\u1eb6T V\u1ea4N \u0110\u1ec0: <\/b><\/p>\n

Nghi\u00ean c\u1ee9u, x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 ho\u00e1 h\u1ecdc g\u1ed7 l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 quan tr\u1ecdng trong khoa h\u1ecdc g\u1ed7 n\u00f3i ri\u00eang v\u00e0 trong nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 gi\u00e1 tr\u1ecb t\u00e0i nguy\u00ean r\u1eebng n\u00f3i chung. K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 ho\u00e1 h\u1ecdc g\u1ed7 l\u00e0 c\u01a1 s\u1edf khoa h\u1ecdc r\u1ea5t c\u01a1 b\u1ea3n \u0111\u1ec3 t\u00ecm hi\u1ec3u v\u1ec1 b\u1ea3n ch\u1ea5t c\u1ee7a g\u1ed7, l\u00e0 c\u0103n c\u1ee9 cho ch\u1ebf bi\u1ebfn, b\u1ea3o qu\u1ea3n v\u00e0 s\u1eed d\u1ee5ng h\u1ee3p l\u00fd ngu\u1ed3n t\u00e0i nguy\u00ean g\u1ed7; l\u00e0 nh\u1eefng ti\u00eau ch\u00ed \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u1ea5t l\u01b0\u1ee3ng r\u1eebng, \u0111\u00e1nh gi\u00e1 tuy\u1ec3n ch\u1ecdn gi\u1ed1ng; nghi\u00ean c\u1ee9u nh\u1eefng \u1ea3nh h\u01b0\u1edfng c\u1ee7a c\u00e1c nh\u00e2n t\u1ed1 m\u00f4i tr\u01b0\u1eddng, bi\u1ec7n ph\u00e1p kinh doanh,….<\/p>\n

Nghi\u00ean c\u1ee9u v\u1ec1 tre tr\u00fac t\u1eeb tr\u01b0\u1edbc \u0111\u1ebfn nay t\u1eadp trung ch\u1ee7 y\u1ebfu v\u00e0o l\u0129nh v\u1ef1c l\u00e2m sinh. Nghi\u00ean c\u1ee9u v\u1ec1 t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc, ho\u00e1 h\u1ecdc v\u00e0 gi\u1ea3i ph\u1eabu c\u1ee7a tre m\u1edbi l\u00e0m \u0111\u01b0\u1ee3c \u00edt, m\u1eb7c d\u00f9 n\u00f3 c\u00f3 t\u1ea7m quan tr\u1ecdng to l\u1edbn \u0111\u1ed1i v\u1edbi nghi\u00ean c\u1ee9u, s\u1ea3n xu\u1ea5t nh\u01b0 g\u1ed7. S\u1ef1 thi\u1ebfu h\u1ee5t n\u00e0y c\u1ea7n ph\u1ea3i b\u1ed5 sung k\u1ecbp th\u1eddi v\u00e0 \u0111\u1ea7y \u0111\u1ee7.<\/p>\n

Nh\u01b0 v\u1eady, nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc, ho\u00e1 h\u1ecdc v\u00e0 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu c\u1ee7a g\u1ed7 v\u00e0 tre \u1edf n\u01b0\u1edbc ta c\u00f3 m\u1ed9t \u00fd ngh\u0129a to l\u1edbn, nh\u01b0ng k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u t\u1eeb tr\u01b0\u1edbc cho \u0111\u1ebfn nay c\u00f2n r\u1ea5t h\u1ea1n ch\u1ebf c\u1ea3 v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng, \u0111\u00e3 kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c nh\u1eefng nhu c\u1ea7u, \u0111\u00f2i h\u1ecfi c\u1ee7a th\u1ef1c ti\u1ec5n s\u1ea3n xu\u1ea5t hi\u1ec7n nay.\u00a0 \u0110\u1ec1 t\u00e0i: “Nghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t c\u01a1, v\u1eadt l\u00fd v\u00e0 gi\u1ea3i ph\u1eabu c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i g\u1ed7 v\u00e0 tre th\u00f4ng d\u1ee5ng \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” <\/i>l\u00e0 c\u00f4ng vi\u1ec7c th\u1ef1c hi\u1ec7n l\u00e2u d\u00e0i nh\u01b0ng t\u1eebng b\u01b0\u1edbc ph\u1ea3i \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 thi\u1ebft th\u1ef1c.<\/p>\n

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

II. M\u1ee4C TI\u00caU, N\u1ed8I DUNG V\u00c0 PH\u01af\u01a0NG PH\u00c1P NGHI\u00caN C\u1ee8U:<\/h1>\n

2.1. M\u1ee5c ti\u00eau c\u1ee7a \u0111\u1ec1 t\u00e0i:<\/b><\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 L\u1eadp \u0111\u01b0\u1ee3c c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1ec1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, v\u1eadt l\u00fd, ho\u00e1 h\u1ecdc v\u00e0 b\u1ea3n m\u00f4 t\u1ea3 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu th\u00e2n kh\u00ed sinh c\u1ee7a 5 lo\u00e0i tre v\u00e0 10 lo\u00e0i g\u1ed7 th\u00f4ng d\u1ee5ng.<\/p>\n

–\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Xu\u1ea5t b\u1ea3n \u0111\u01b0\u1ee3c 1 cu\u1ed1n\u00a0 \u00c1t-l\u00e1t cho m\u1ed9t s\u1ed1 lo\u00e0i tre v\u00e0 g\u1ed7 th\u00f4ng d\u1ee5ng.<\/p>\n

2.2. N\u1ed9i dung v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u:<\/b><\/p>\n

1) Thu th\u1eadp v\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 m\u00f4 t\u1ea3 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu c\u1ee7a g\u1ed7.<\/p>\n

2) Nghi\u00ean c\u1ee9u x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc c\u1ee7a 5 lo\u00e0i tre theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf ISO22157. Bamboo-Determination of physical and mechanical properties v\u00e0 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu tre theo h\u01b0\u1edbng d\u1eabn trong quy\u1ec3n \u201cThe anatomy of Bamboo culms\u201d<\/p>\n

3) Nghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t c\u01a1, v\u1eadt l\u00fd v\u00e0 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu c\u1ee7a 10 lo\u00e0i g\u1ed7 theo ph\u01b0\u01a1ng ph\u00e1p phi\u1ebfu l\u1ed7 c\u1ee7a CTFT v\u00e0 Nguy\u1ec5n \u0110\u00ecnh H\u01b0ng 1990 v\u1edbi 70 \u0111\u1eb7c \u0111i\u1ec3m c\u01a1 b\u1ea3n v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n c\u1ee7a Vi\u1ec7t Nam TCVN 355-70 \u0111\u1ebfn 370-70.<\/p>\n

4) Nghi\u00ean c\u1ee9u th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a g\u1ed7 v\u00e0 tre theo ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf T232 su-68, T9 m-54, T13 os-54, T19 m-50, T6 os-95, T1 os-59, T4 os-59, T15 os-58, T435 su-68, T232 su-59.<\/p>\n

5) \u1ee8ng d\u1ee5ng c\u00f4ng ngh\u1ec7 Dot Net phi\u00ean b\u1ea3n 2008 c\u1ee7a t\u1eadp \u0111o\u00e0n Microsoft l\u1eadp ph\u1ea7n m\u1ec1m tra c\u1ee9u v\u1ec1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, v\u1eadt l\u00fd, ho\u00e1 h\u1ecdc v\u00e0 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu cho m\u1ed9t s\u1ed1 lo\u00e0i tre v\u00e0 lo\u00e0i g\u1ed7 th\u00f4ng d\u1ee5ng.<\/p>\n

6)\u00a0\u00a0\u00a0\u00a0 \u0110\u00e1nh gi\u00e1 ph\u00e2n lo\u1ea1i c\u00e1c t\u00ednh ch\u1ea5t<\/p>\n

– T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 v\u1eadt l\u00fd g\u1ed7, tre: Theo ti\u00eau chu\u1ea9n TCVN 1072-71 v\u00e0 d\u1ef1 th\u1ea3o ph\u00e2n lo\u1ea1i g\u1ed7 c\u1ee7a Nguy\u1ec5n \u0110\u00ecnh H\u01b0ng n\u0103m 1977.<\/p>\n

– \u0110\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o, k\u00edch th\u01b0\u1edbc c\u00e1c t\u1ebf b\u00e0o: Theo ph\u00e2n lo\u1ea1i c\u1ee7a t\u1ed5 ch\u1ee9c gi\u1ea3i ph\u1eabu g\u1ed7 th\u1ebf gi\u1edbi IAWA.<\/p>\n

7) Bi\u00ean so\u1ea1n cu\u1ed1n \u00c1t -l\u00e1t cho 50 lo\u00e0i tre v\u00e0 g\u1ed7 th\u00f4ng d\u1ee5ng.<\/p>\n

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

2.3. V\u1eadt li\u1ec7u nghi\u00ean c\u1ee9u: <\/b>5 lo\u00e0i tre v\u00e0 10 lo\u00e0i g\u1ed7<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

TT<\/b><\/p>\n<\/td>\n

\n

T\u00ean lo\u00e0i<\/b><\/p>\n<\/td>\n

\n

T\u00ean Khoa h\u1ecdc<\/b><\/p>\n<\/td>\n

\n

\u0110\u1ecba \u0111i\u1ec3m l\u1ea5y m\u1eabu<\/b><\/p>\n<\/td>\n<\/tr>\n

\n

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

\n

D\u00f9ng ph\u1ea5n<\/p>\n<\/td>\n

\n

Bambusa chungii <\/i>McClure<\/p>\n<\/td>\n

\n

Ph\u00fa Th\u1ecd<\/p>\n<\/td>\n<\/tr>\n

\n

2<\/p>\n<\/td>\n

\n

Tre l\u00e0 ng\u00e0<\/p>\n<\/td>\n

\n

Bambusa sinospinosa\u00a0 <\/i>McClure<\/p>\n<\/td>\n

\n

Ph\u00fa Th\u1ecd<\/p>\n<\/td>\n<\/tr>\n

\n

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

\n

Mai \u1ed1ng<\/p>\n<\/td>\n

\n

Dendrocalamus yunnannicus Hsueh et D.Z. Li<\/i><\/p>\n<\/td>\n

\n

Ph\u00fa Th\u1ecd<\/p>\n<\/td>\n<\/tr>\n

\n

4<\/p>\n<\/td>\n

\n

V\u1ea7u ng\u1ecdt<\/p>\n<\/td>\n

\n

Indosasa parvifolia <\/i>C.S.Chao et Q.H.Dai<\/p>\n<\/td>\n

\n

Ph\u00fa Th\u1ecd<\/p>\n<\/td>\n<\/tr>\n

\n

5<\/p>\n<\/td>\n

\n

H\u00f3p \u0111\u00e1<\/p>\n<\/td>\n

\n

Bambusa dissemulator <\/i>McClure<\/p>\n<\/td>\n

\n

Ph\u00fa Th\u1ecd<\/p>\n<\/td>\n<\/tr>\n

\n

6<\/p>\n<\/td>\n

\u0110\u01b0\u1edbc<\/td>\nRhizophora apiculata <\/i>Blume<\/td>\n\n

C\u00e0 Mau<\/p>\n<\/td>\n<\/tr>\n

\n

7<\/p>\n<\/td>\n

V\u1eb9t t\u00e1ch<\/td>\nBruguiera pariflora <\/i>(Roxb.) Wight & Arn.. ex Griff.<\/i><\/td>\n\n

C\u00e0 Mau<\/p>\n<\/td>\n<\/tr>\n

\n

8<\/p>\n<\/td>\n

\u0110\u01b0ng<\/td>\nRhizophora mucronata <\/i>Poir.<\/td>\nB\u1ebfn Tre<\/td>\n<\/tr>\n
\n

9<\/p>\n<\/td>\n

Su sung<\/td>\nXylocarpus moluccensis <\/i>(Lamk.) M. Roem.<\/td>\n\n

C\u00e0 Mau<\/p>\n<\/td>\n<\/tr>\n

\n

10<\/p>\n<\/td>\n

\n

B\u1ea1ch \u0111\u00e0n uro<\/p>\n<\/td>\n

\n

Eucalyptus urophylla <\/i>S.T. Blake<\/p>\n<\/td>\n

\n

V\u0129nh Ph\u00fac<\/p>\n<\/td>\n<\/tr>\n

\n

11<\/p>\n<\/td>\n

Tr\u1ea7m<\/td>\nAquilaria crassna <\/i>Pierre ex Lecomte<\/td>\n\n

Qu\u1ea3ng Nam<\/p>\n<\/td>\n<\/tr>\n

\n

12<\/p>\n<\/td>\n

G\u1ea1o<\/td>\nBombax malabarica <\/i>DC.<\/td>\n\n

L\u1ea1ng S\u01a1n<\/p>\n<\/td>\n<\/tr>\n

\n

13<\/p>\n<\/td>\n

G\u00e1o tr\u1eafng<\/td>\nNeolamarckia cadamba <\/i>(Roxb.) Booser<\/td>\n\n

An Giang<\/p>\n<\/td>\n<\/tr>\n

\n

14<\/p>\n<\/td>\n

B\u00f4ng g\u00f2n<\/td>\nCeiba pentandra <\/i>(L.) Gaertn<\/td>\n\n

An Giang<\/p>\n<\/td>\n<\/tr>\n

\n

15<\/p>\n<\/td>\n

S\u1eefa<\/td>\nAlstonia scholaris <\/i>(L.) R. Br<\/td>\n\n

\u0110\u1eafc L\u1eafc<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

III. K\u1ebeT QU\u1ea2 NGHI\u00caN C\u1ee8U:<\/b><\/p>\n

3.1. K\u1ebft qu\u1ea3 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 g\u1ed7:<\/b><\/p>\n

– Nghi\u00ean c\u1ee9u c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu g\u1ed7: 1106 m\u1eabu lo\u00e0i \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u v\u1ec1 c\u1ea5u t\u1ea1o th\u00f4 \u0111\u1ea1i, 529 m\u1eabu lo\u00e0i \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u c\u1ea5u t\u1ea1o hi\u1ec3n vi t\u1ea1i 3 c\u01a1 quan ch\u00ednh l\u00e0 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh. S\u1ed1 m\u1eabu lo\u00e0i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng g\u1ed3m 906 m\u1eabu c\u1ea5u t\u1ea1o th\u00f4 \u0111\u1ea1i, 523 m\u1eabu c\u1ea5u t\u1ea1o hi\u1ec3n vi v\u00e0 84 b\u1ed9 \u1ea3nh gi\u1ea3i ph\u1eabu. K\u1ebft qu\u1ea3 \u0111\u00f3 l\u00e0 c\u0103n c\u1ee9 quan tr\u1ecdng l\u1eadp b\u1ea3ng kh\u00f3a tra \u0111\u1ecbnh lo\u1ea1i g\u1ed7.<\/p>\n

– Nghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t g\u1ed7: 655 m\u1eabu lo\u00e0i g\u1ed7 \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u t\u1ea1i 3 \u0111\u01a1n v\u1ecb nh\u01b0\u00a0 tr\u00ean, s\u01a1 b\u1ed9 \u0111\u00e1nh gi\u00e1 157 lo\u00e0i (24%), thu\u1ed9c nh\u00f3m kh\u00f4ng c\u00f3 t\u00ean khoa h\u1ecdc ho\u1eb7c t\u00ean Vi\u1ec7t Nam, ho\u1eb7c ch\u01b0a nghi\u00ean c\u1ee9u 4\/5 t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n, \u0111\u1ec1 ngh\u1ecb \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u l\u1ea1i; 162 lo\u00e0i (25%) thi\u1ebfu ho\u1eb7c sai t\u00ean khoa h\u1ecdc, thi\u1ec3u 3\/5 t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n c\u1ea7n \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u b\u1ed5 sung; 285 lo\u00e0i (43%) c\u00f3 \u0111\u1ee7 t\u00ean khoa h\u1ecdc, t\u00ean Vi\u1ec7t Nam, \u0111\u1ee7 5 t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n nh\u01b0ng s\u1ed1 l\u01b0\u1ee3ng m\u1eabu th\u1eed <20 v\u00e0 sai s\u1ed1 c\u1ee7a s\u1ed1 li\u1ec7u >5% n\u00ean x\u1ebfp v\u00e0o nh\u00f3m tham kh\u1ea3o khi s\u1eed d\u1ee5ng; ch\u1ec9 c\u00f3 51 lo\u00e0i (8%) c\u00f3 t\u01b0 li\u1ec7u \u0111\u1ea7y \u0111\u1ee7 v\u00e0 \u0111\u00e1ng tin c\u1eady \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 v\u00e0o nh\u00f3m s\u1eed d\u1ee5ng t\u1ed1t. K\u1ebft qu\u1ea3 tr\u00ean \u0111\u00e3 g\u00f3p ph\u1ea7n ph\u1ee5c v\u1ee5 gi\u1ea3ng d\u1eady, \u0111\u00e0o t\u1ea1o, qu\u1ea3n l\u00fd v\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n

– T\u1eadp h\u1ee3p \u0111\u01b0\u1ee3c nh\u1eefng k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u00e3 c\u00f3, 2 cu\u1ed1n s\u00e1ch \u0111\u00e3 \u0111\u01b0\u1ee3c xu\u1ea5t b\u1ea3n g\u1ed3m:<\/p>\n

+ Cu\u1ed1n s\u00e1ch \u201cC\u00e1c lo\u1ea1i g\u1ed7 th\u00f4ng d\u1ee5ng \u1edf Vi\u1ec7t Nam, \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 h\u01b0\u1edbng s\u1eed d\u1ee5ng\u201d gi\u1edbi thi\u1ec7u \u0111\u1eb7c t\u00ednh g\u1ed7 c\u1ee7a 53 chi thu\u1ed9c 25 h\u1ecd th\u1ef1c v\u1eadt, k\u00e8m theo m\u1ed7i chi c\u00f3 ch\u1ecdn ra m\u1ed9t s\u1ed1 c\u00e2y \u0111\u1ea1i di\u1ec7n.<\/p>\n

+ <\/b>Cu\u1ed1n s\u00e1ch \u201c\u00c1t-l\u00e1t c\u1ea5u t\u1ea1o, t\u00ednh ch\u1ea5t g\u1ed7 v\u00e0 tre Vi\u1ec7t Nam (t\u1eadp 1)\u201d: <\/b>Cung c\u1ea5p c\u00e1c th\u00f4ng tin v\u1ec1 c\u1ea5u t\u1ea1o th\u00f4 \u0111\u1ea1i, hi\u1ec3n vi, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc, h\u01b0\u1edbng s\u1eed d\u1ee5ng g\u1ed7, \u0111\u1eb7c \u0111i\u1ec3m h\u00ecnh th\u00e1i v\u00e0 sinh h\u1ecdc c\u1ee7a 45 lo\u00e0i c\u00e2y g\u1ed7 v\u00e0 5 lo\u00e0i tre c\u1ee7a Vi\u1ec7t Nam.<\/p>\n

3.2. C\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1ec1 c\u1ea5u t\u1ea1o gi\u1ea3i ph\u1eabu, t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 th\u00e0nh ph\u1ea7n ho\u00e1 h\u1ecdc c\u1ee7a 10 lo\u00e0i g\u1ed7 v\u00e0 5 lo\u00e0i tre: <\/b><\/p>\n

* G\u1ed7 \u0110\u01b0\u1edbc (Rhizophora apiculata <\/i>Blume), V\u1eb9t t\u00e1ch (Bruguiera pariflora <\/i>(Roxb.) <\/b>Wight & Arn.. ex Griff.) <\/i>v\u00e0 <\/i>\u0110\u01b0ng (Rhizophora mucronata <\/i>Poir.)<\/b>: l\u00e0 3 lo\u00e0i c\u00e2y g\u1ed7 thu\u1ed9c h\u1ecd \u0110\u01b0\u1edbc (Rhizophoraceae). G\u1ed7 c\u00f3 d\u00e1c l\u00f5i ph\u00e2n bi\u1ec7t (\u0110\u01b0\u1edbc) ho\u1eb7c kh\u00f4ng ph\u00e2n bi\u1ec7t d\u00e1c l\u00f5i (V\u1eb9t t\u00e1ch, \u0110\u01b0ng). V\u00f2ng sinh tr\u01b0\u1edfng r\u00f5 r\u00e0ng, r\u1ed9ng 4-6 mm. M\u1eb7t g\u1ed7 m\u1ecbn. M\u1ea1ch \u0111\u01a1n v\u00e0 k\u00e9p ng\u1eafn ph\u00e2n t\u00e1n. Trong m\u1ea1ch th\u01b0\u1eddng c\u00f3 th\u1ec3 b\u00edt d\u1ea1ng m\u00e0ng m\u1ecfng. M\u00f4 m\u1ec1m ph\u00e2n t\u00e1n v\u00e0 t\u1ee5 h\u1ee3p, d\u00ednh m\u1ea1ch kh\u00f4ng \u0111\u1ec1u, th\u00e0nh \u0111\u01b0\u1eddng \u1edf gi\u1edbi h\u1ea1n v\u00f2ng n\u0103m (\u0110\u01b0\u1edbc), \u00edt, kh\u00f3 th\u1ea5y. Tia g\u1ed7 d\u1ecb h\u00ecnh, to, d\u1ec5 th\u1ea5y, trong tia v\u00e0 trong m\u00f4 m\u1ec1m d\u1ecdc th\u01b0\u1eddng c\u00f3 tinh th\u1ec3. Tia g\u1ed7 c\u00f3 hai \u0111\u1ed9 r\u1ed9ng kh\u00e1c nhau\u00a0 v\u00e0 c\u00f3 nhi\u1ec1u d\u00e3y t\u1ebf b\u00e0o(V\u1eb9t t\u00e1ch, \u0110\u01b0ng). G\u00f3c nghi\u00eang vi th\u1edb s\u1ee3i g\u1ed7 nh\u1ecf, \u00edt thay \u0111\u1ed5i t\u1eeb trong t\u00e2m ra ngo\u00e0i. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch l\u1ea7n l\u01b0\u1ee3t l\u00e0 0,91, 0,95, 1,04 g\/cm3<\/sup>.<\/p>\n

G\u1ed7 \u0110\u01b0\u1edbc, V\u1eb9t t\u00e1ch, \u0110\u01b0ng c\u00f3 h\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch cao (0,7) c\u1ea7n th\u1eadn tr\u1ecdng trong qu\u00e1 tr\u00ecnh ph\u01a1i s\u1ea5y, g\u1ed7 d\u1ec5 cong, n\u1ee9t. G\u1ed7 c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf, kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch cao, m\u1eb7t g\u1ed7 m\u1ecbn, v\u00e2n g\u1ed7 kh\u00f4ng \u0111\u1eb7c bi\u1ec7t, g\u1ed7 c\u00f3 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc t\u1eeb cao \u0111\u1ebfn r\u1ea5t cao nh\u01b0 \u1ee9ng su\u1ea5t khi n\u00e9n d\u1ecdc (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 93, 85, 97 MPa), \u1ee9ng su\u1ea5t khi k\u00e9o d\u1ecdc (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 229, 180, 203 MPa), \u1ee9ng su\u1ea5t u\u1ed1n t\u0129nh (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 216, 149, 291 MPa), \u1ee9ng su\u1ea5t khi tr\u01b0\u1ee3t d\u1ecdc (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 22, 23, 17,8 MPa)\u00a0 n\u00ean g\u1ed7 nh\u1eefng lo\u00e0i c\u00e2y n\u00e0y c\u00f3 th\u1ec3 d\u00f9ng \u0111\u00f3ng c\u1ecdc m\u00f3ng, d\u00f9ng trong x\u00e2y d\u1ef1ng v\u00e0 giao th\u00f4ng. N\u1ebfu \u0111\u01b0\u1ee3c x\u1ee7 l\u00fd \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc t\u1ed1t th\u00ec c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m thanh ch\u1edbp c\u1eeda. G\u1ed7 d\u1ec5 c\u01b0a x\u1ebb khi t\u01b0\u01a1i. \u0110\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean cao trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4 r\u00e1o. Theo TCVN 1072-71 th\u00ec 3 lo\u1ea1i g\u1ed7 n\u00e0y \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m I.<\/p>\n

G\u1ed7 c\u00f3 s\u1ee3i ng\u1eafn \u0111\u1ebfn trung b\u00ecnh, h\u00e0m l\u01b0\u1ee3ng xenlul\u00f4 v\u00e0 lignin trung b\u00ecnh n\u00ean kh\u00f4ng th\u00edch h\u1ee3p \u0111\u1ec3 s\u1ea3n xu\u1ea5t b\u1ed9t gi\u1ea5y. H\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t tan v\u00e0 \u0111\u1ed9 pH trong g\u1ed7 trung b\u00ecnh ho\u1eb7c th\u1ea5p, kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh d\u00e1n d\u00ednh c\u1ee7a keo.<\/p>\n

* G\u1ed7 Su sung (Xylocarpus moluccensis <\/i>(Lam.) M. Roem.) v\u00e0 B\u1ea1ch \u0111\u00e0n uro (Eucalyptus urophylla <\/i>S.T. Blake.)<\/i>:<\/b> G\u1ed7 c\u00f3 d\u00e1c l\u00f5i ph\u00e2n bi\u1ec7t (B\u1ea1ch \u0111\u00e0n Uro) ho\u1eb7c kh\u00f4ng ph\u00e2n bi\u1ec7t d\u00e1c l\u00f5i (Su sung). V\u00f2ng sinh tr\u01b0\u1edfng r\u00f5 r\u00e0ng, r\u1ed9ng 6-8 mm. M\u1eb7t g\u1ed7 m\u1ecbn (Su sung) ho\u1eb7c trung b\u00ecnh (B\u1ea1ch \u0111\u00e0n Uro). M\u1ea1ch \u0111\u01a1n v\u00e0 k\u00e9p ng\u1eafn ph\u00e2n t\u00e1n. \u0110\u01b0\u1eddng k\u00ednh m\u1ea1ch trung b\u00ecnh, trong m\u1ea1ch th\u01b0\u1eddng kh\u00f4ng c\u00f3 th\u1ec3 b\u00edt ho\u1eb7c ch\u1ea5t ch\u1ee9a. M\u00f4 m\u1ec1m ph\u00e2n t\u00e1n v\u00e0 t\u1ee5 h\u1ee3p, d\u00ednh m\u1ea1ch kh\u00f4ng \u0111\u1ec1u, th\u00e0nh \u0111\u01b0\u1eddng ti\u1ebfp tuy\u1ebfn \u1edf gi\u1edbi h\u1ea1n v\u00f2ng n\u0103m (Su sung), hay \u00edt, kh\u00f3 th\u1ea5y (B\u1ea1ch \u0111\u00e0n Uro). Tia g\u1ed7 d\u1ecb h\u00ecnh v\u1edbi nh\u1eefng t\u1eadn c\u00f9ng ng\u1eafn, th\u01b0\u1eddng 3-4 d\u00e3y t\u1ebf b\u00e0o (Su sung) ho\u1eb7c 1-2 d\u00e3y t\u1ebf b\u00e0o (B\u1ea1ch \u0111\u00e0n Uro); Trong tia g\u1ed7 Su sung c\u00f3 tinh th\u1ec3. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch l\u1ea7n l\u01b0\u1ee3t l\u00e0 0,68 v\u00e0 0,64 g\/cm3<\/sup>.<\/p>\n

G\u1ed7 Su sung v\u00e0 g\u1ed7 B\u1ea1ch \u0111\u00e0n Uro c\u00f3 h\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch trung b\u00ecnh (0,4-0,5) kh\u00f4ng qu\u00e1 kh\u00f3 s\u1ea5y, ch\u00fa \u00fd kh\u00f4ng \u0111\u1ec3 ngo\u00e0i tr\u1eddi n\u1eafng n\u00f3ng. G\u1ed7 c\u00f3 k\u00edch th\u01b0\u1edbc trung b\u00ecnh, v\u00e2n g\u1ed7 kh\u00f4ng \u0111\u1eb7c bi\u1ec7t, g\u1ed7 c\u00f3 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc t\u1eeb trung b\u00ecnh \u0111\u1ebfn cao nh\u01b0 \u1ee9ng su\u1ea5t khi n\u00e9n d\u1ecdc (51 v\u00e0 56 MPa), \u1ee9ng su\u1ea5t khi k\u00e9o d\u1ecdc (420 v\u00e0 98 MPa), \u1ee9ng su\u1ea5t u\u1ed1n t\u0129nh (78 v\u00e0 104 MPa), \u1ee9ng su\u1ea5t khi tr\u01b0\u1ee3t d\u1ecdc (13 v\u00e0 14,1 MPa)\u00a0 n\u00ean g\u1ed7 nh\u1eefng lo\u00e0i c\u00e2y n\u00e0y c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m \u0111\u1ed3 m\u1ed9c d\u00e2n d\u1ee5ng ho\u1eb7c d\u00f9ng trong x\u00e2y d\u1ef1ng. \u0110\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean kh\u00f4ng cao n\u00ean c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n. Theo TCVN 1072-71 th\u00ec 2 lo\u1ea1i g\u1ed7 n\u00e0y \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m III.<\/p>\n

G\u1ed7 c\u00f3 s\u1ee3i d\u00e0i trung b\u00ecnh, g\u1ed7 c\u00f3 h\u00e0m l\u01b0\u1ee3ng xenlul\u00f4 v\u00e0 lignin trung b\u00ecnh (Su sung) ho\u1eb7c cao (B\u1ea1ch \u0111\u00e0n Uro), h\u00e0m l\u01b0\u1ee3ng pentozan th\u1ea5p n\u00ean c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t b\u1ed9t gi\u1ea5y, b\u0103m d\u0103m. H\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t tan v\u00e0 \u0111\u1ed9 pH trong g\u1ed7 trung b\u00ecnh ho\u1eb7c th\u1ea5p, kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh d\u00e1n d\u00ednh c\u1ee7a keo.<\/p>\n

* G\u1ed7 B\u00f4ng g\u00f2n (<\/b>Ceiba pentandra<\/i><\/b> (L.) Gaertn.) , G\u00e1o tr\u1eb1ng (Neolamarckia cadamba <\/i>(Roxb.) Booser) , S\u1eefa (Alstonia scholaris <\/i>(L.) R. Br.), Tr\u1ea7m (Aquilaria crassna <\/i>Pierre ex Lecomte), G\u1ea1o (Bombax malabaricum <\/i>DC.): <\/b>G\u1ed7 c\u00f3 d\u00e1c l\u00f5i ph\u00e2n bi\u1ec7t d\u00e1c l\u00f5i (B\u00f4ng g\u00f2n, G\u00e1o tr\u1eafng, G\u1ea1o) ho\u1eb7c kh\u00f3 ph\u00e2n bi\u1ec7t d\u00e1c l\u00f5i (S\u1eefa, Tr\u1ea7m). V\u00f2ng sinh tr\u01b0\u1edfng r\u00f5 r\u00e0ng, r\u1ed9ng kho\u1ea3ng 10 mm (B\u00f4ng g\u00f2n, G\u00e1o tr\u1eafng, G\u1ea1o) ho\u1eb7c kh\u00f4ng r\u00f5 (Tr\u1ea7m). M\u1eb7t g\u1ed7 m\u1ecbn (Tr\u1ea7m) ho\u1eb7c trung b\u00ecnh (S\u1eefa) hay th\u00f4 (B\u00f4ng g\u00f2n, G\u00e1o tr\u1eafng, G\u1ea1o). M\u1ea1ch \u0111\u01a1n v\u00e0 k\u00e9p ng\u1eafn ph\u00e2n t\u00e1n, \u00edt khi k\u00e9p d\u00e0i tr\u00ean 4 (B\u00f4ng g\u00f2n, Tr\u1ea7m). \u0110\u01b0\u1eddng k\u00ednh m\u1ea1ch trung b\u00ecnh, trong m\u1ea1ch th\u01b0\u1eddng kh\u00f4ng c\u00f3 th\u1ec3 b\u00edt ho\u1eb7c ch\u1ea5t ch\u1ee9a. M\u00f4 m\u1ec1m nhi\u1ec1u, kh\u00f3 th\u1ea5y, ph\u00e2n t\u00e1n v\u00e0 t\u1ee5 h\u1ee3p, d\u00ednh m\u1ea1ch kh\u00f4ng \u0111\u1ec1u, th\u00e0nh \u0111\u01b0\u1eddng ti\u1ebfp tuy\u1ebfn \u1edf gi\u1edbi h\u1ea1n v\u00f2ng n\u0103m (S\u1eefa), hay th\u00e0nh t\u1ea7ng (G\u1ea1o). Tia g\u1ed7 d\u1ecb h\u00ecnh v\u1edbi nh\u1eefng t\u1eadn c\u00f9ng ng\u1eafn (B\u00f4ng g\u00f2n, S\u1eefa, Tr\u1ea7m, G\u1ea1o) ho\u1eb7c d\u00e0i (G\u00e1o tr\u1eafng), th\u01b0\u1eddng 1 d\u00e3y t\u1ebf b\u00e0o (Tr\u1ea7m) ho\u1eb7c 2-3 d\u00e3y t\u1ebf b\u00e0o (G\u00e1o tr\u1eafng, S\u1eefa, G\u1ea1o) hay 2 \u0111\u1ed9 r\u1ed9ng kh\u00e1c nhau (B\u00f4ng g\u00f2n); Trong tia g\u1ed7 c\u00f3 tinh th\u1ec3 (tr\u1eeb Tr\u1ea7m). Trong g\u1ed7 c\u00f3 t\u1ebf b\u00e0o libe (Tr\u1ea7m). Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch l\u1ea7n l\u01b0\u1ee3t l\u00e0 0,32, 0,46, 0,43, 0,36, v\u00e0 0,36g\/cm3<\/sup>.<\/p>\n

G\u1ed7 c\u00f3 h\u1ec7 s\u1ed1 co r\u00fat th\u1ec3 t\u00edch trung b\u00ecnh (G\u00e1o tr\u1eafng, S\u1eefa, Tr\u1ea7m, G\u1ea1o) ho\u1eb7c th\u1ea5p (B\u00f4ng g\u00f2n), n\u00ean thu\u1eadn l\u1ee3i trong qu\u00e1 tr\u00ecnh ph\u01a1i s\u1ea5y. G\u1ed7 c\u00f3 k\u00edch th\u01b0\u1edbc trung b\u00ecnh ho\u1eb7c l\u1edbn, v\u00e2n g\u1ed7 kh\u00f4ng \u0111\u1eb7c bi\u1ec7t, g\u1ed7 c\u00f3 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc t\u1eeb th\u1ea5p\u00a0 \u0111\u1ebfn trung b\u00ecnh nh\u01b0 \u1ee9ng su\u1ea5t khi n\u00e9n d\u1ecdc (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 20, 36, 27, 22 v\u00e0 28 MPa), \u1ee9ng su\u1ea5t khi k\u00e9o d\u1ecdc (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 31, 71, 49, 58, v\u00e0 42 MPa), \u1ee9ng su\u1ea5t u\u1ed1n t\u0129nh (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 33, 66, 59, 43 v\u00e0 43 MPa), \u1ee9ng su\u1ea5t khi tr\u01b0\u1ee3t d\u1ecdc (l\u1ea7n l\u01b0\u1ee3t l\u00e0: 5,3, 10,4, 9,1, 4,8 v\u00e0 5,3 MPa)\u00a0 n\u00ean g\u1ed7 nh\u1eefng lo\u00e0i c\u00e2y n\u00e0y m\u1ec1m, nh\u1eb9, kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c kh\u00f4ng cao, ch\u1ec9 th\u00edch h\u1ee3p l\u00e0m v\u00e1n \u1ed1p tr\u1ea7n, \u0111\u1ed3 d\u00f9ng th\u00f4ng th\u01b0\u1eddng ho\u1eb7c x\u1eed l\u00fd bi\u1ebfn t\u00ednh g\u1ed7 t\u0103ng ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7. \u0110\u1ed9 b\u1ec1n t\u1ef1 nhi\u00ean kh\u00f4ng cao n\u00ean c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n. Theo TCVN 1072-71 th\u00ec c\u00e1c lo\u1ea1i g\u1ed7 n\u00e0y \u0111\u01b0\u1ee3c x\u1ebfp v\u00e0o nh\u00f3m V (G\u00e1o tr\u1eafng) v\u00e0 \u00a0nh\u00f3m VI (B\u00f4ng g\u00f2n, S\u1eefa, Tr\u1ea7m, G\u1ea1o).<\/p>\n

G\u1ed7 c\u00f3 s\u1ee3i ng\u1eafn (Tr\u1ea7m) hay trung b\u00ecnh (G\u00e1o tr\u1eafng, S\u1eefa) ho\u1eb7c d\u00e0i (B\u00f4ng g\u00f2n, G\u1ea1o), g\u1ed7 c\u00f3 h\u00e0m l\u01b0\u1ee3ng xenlul\u00f4 trung b\u00ecnh ho\u1eb7c cao (Tr\u1ea7m), h\u00e0m l\u01b0\u1ee3ng lignin trung b\u00ecnh, h\u00e0m l\u01b0\u1ee3ng pentozan th\u1ea5p n\u00ean c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t b\u1ed9t gi\u1ea5y. H\u00e0m l\u01b0\u1ee3ng c\u00e1c ch\u1ea5t tan v\u00e0 \u0111\u1ed9 pH trong g\u1ed7 trung b\u00ecnh ho\u1eb7c th\u1ea5p, kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh d\u00e1n d\u00ednh c\u1ee7a keo.<\/p>\n

* Tre V\u1ea7u ng\u1ecdt (<\/b>Indosasa parvifolia <\/i><\/b>C.S.Chao et Q.H.Dai), L\u00e0 ng\u00e0 (<\/b>Bambusa sinospinosa <\/i><\/b>McClure) v\u00e0 Mai \u1ed1ng (<\/b>Dendrocalamus yunnannicus<\/i><\/b> Hsueh et D.Z.Li)<\/b> l\u00e0 3 lo\u00e0i tre c\u00f3 th\u00e2n to, \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 10-12cm, v\u00e1ch th\u00e2n t\u1eeb trung b\u00ecnh \u0111\u1ebfn d\u1ea7y. T\u1ea1i \u0111\u1ed1t th\u1ee9 8 t\u1eeb g\u1ed1c l\u00ean, \u0111\u1ed9 d\u1ea7y v\u00e1ch th\u00e2n c\u1ee7a V\u1ea7u ng\u1ecdt (0,72cm), c\u1ee7a Mai \u1ed1ng (0,9cm), L\u00e0 ng\u00e0 (1,7cm). B\u00f3 m\u1ea1ch \u1edf V\u1ea7u ng\u1ecdt thu\u1ed9c lo\u1ea1i 1 v\u1edbi c\u00e1c b\u00f3 s\u1ee3i d\u00ednh v\u1edbi Xylem v\u00e0 Libe c\u00f3 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng t\u1ef1 nhau. B\u00f3 m\u1ea1ch \u1edf L\u00e0 ng\u00e0 v\u00e0 Mai \u1ed1ng thu\u1ed9c lo\u1ea1i 3 v\u1edbi m\u1ed9t b\u00f3 m\u1ea1ch trung t\u00e2m v\u00e0 1 b\u00f3 s\u1ecdi n\u1eb1m ph\u00eda trong c\u1ee7a b\u00f3 m\u1ea1ch trung t\u00e2m. B\u00f3 s\u1ee3i n\u1eb1m ph\u00eda trong n\u00e0y s\u1ebd t\u0103ng v\u1ec1 k\u00edch th\u01b0\u1edbc nh\u01b0ng v\u00e1ch s\u1ee3i l\u1ea1i m\u1ecfng \u0111i khi c\u00e0ng v\u00e0o ph\u00eda b\u00ean trong ru\u1ed9t tre. \u1ede bi\u1ec3u b\u00ec th\u00e2n tre, t\u1ebf b\u00e0o ng\u1eafn nhi\u1ec1u, d\u1ec5 th\u1ea5y (V\u1ea7u ng\u1ecdt, Mai \u1ed1ng), t\u1ebf b\u00e0o cork l\u1edbn h\u01a1n t\u1ebf b\u00e0o silica. Kh\u00ed kh\u1ed5ng l\u1edbn, d\u1ec5 th\u1ea5y (V\u1ea7u ng\u1ecdt, Mai \u1ed1ng). T\u1ebf b\u00e0o d\u00e0i d\u00e0i v\u00e0 h\u1eb9p v\u00e1ch th\u1eb3ng t\u1edbi h\u01a1i l\u01b0\u1ee3n s\u00f3ng (V\u1ea7u ng\u1ecdt, Mai \u1ed1ng) hay d\u00e0i trung b\u00ecnh v\u00e0 h\u01a1i ph\u00ecnh \u1edf gi\u1eefa, v\u00e1ch nh\u1eb5n (L\u00e0 ng\u00e0). Kh\u00f4ng th\u1ea5y l\u00f4ng to, l\u00f4ng nh\u1ecf. T\u1ebf b\u00e0o b\u1ecdt kh\u00ed kh\u00f3 th\u1ea5y, th\u01b0\u1eddng t\u1eadp trung \u1edf c\u1ea1nh kh\u00ed kh\u1ed5ng. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch l\u1ea7n l\u01b0\u1ee3t l\u00e0 0,78, 0,74, 0,61 g\/cm3<\/sup>.<\/p>\n

Tre V\u1ea7u ng\u1ecdt, L\u00e0 ng\u00e0, Mai \u1ed1ng c\u00f3 \u0111\u1ed9 co r\u00fat th\u1ec3 t\u00edch c\u1ea3 ph\u1ea7n m\u1eaft v\u00e0 ph\u1ea7n l\u00f3ng th\u1ea5p n\u00ean thu\u1eadn l\u1ee3i trong qu\u00e1 tr\u00ecnh ph\u01a1i, s\u1ea5y, c\u00f3 th\u1ec3 ph\u01a1i n\u01a1i d\u00e2m m\u00e1t ho\u1eb7c s\u1ea5y trong l\u00f2 s\u1ea5y c\u00f4ng nghi\u1ec7p. Ph\u1ea7n l\u00f3ng tre th\u01b0\u1eddng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c t\u1ed1t h\u01a1n ph\u1ea7n m\u1eaft \u0111\u1eb7c bi\u1ec7t l\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu k\u00e9o; \u1ee9ng su\u1ea5t n\u00e9n d\u1ecdc th\u1edb \u1edf ph\u1ea7n l\u00f3ng v\u00e0 ph\u1ea7n m\u1eaft c\u1ee7a 3 lo\u00e0i t\u01b0\u01a1ng \u1ee9ng l\u00e0: 58 v\u00e0 45, 58 v\u00e0 54, 48 v\u00e0 52 MPa; \u1ee9ng su\u1ea5t k\u00e9o d\u1ecdc th\u1edb t\u01b0\u01a1ng \u1ee9ng l\u00e0 219 v\u00e0 59, 204 v\u00e0 107, 154 v\u00e0 61 MPa; \u1ee9ng su\u1ea5t u\u1ed1n t\u0129nh ti\u1ebfp tuy\u1ebfn t\u01b0\u01a1ng \u1ee9ng l\u00e0 130 v\u00e0 87, 143 v\u00e0 113, 118 v\u00e0 96 MPa; \u1ee9ng su\u1ea5t tr\u01b0\u1ee3t d\u1ecdc th\u1edb t\u01b0\u01a1ng \u1ee9ng l\u00e0 5,0 v\u00e0 4,2, 6,3 v\u00e0 7,2, 4,7 v\u00e0 4,9 MPa. Nh\u01b0 v\u1eady 3 lo\u00e0i tre n\u00e0y kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c \u1edf m\u1ee9c trung b\u00ecnh n\u00ean c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng v\u00e0o m\u1ed9t s\u1ed1 h\u1ea1ng m\u1ee5c x\u00e2y d\u1ef1ng t\u1ea1m th\u1eddi. V\u1ea7u ng\u1ecdt v\u00e0 Mai \u1ed1ng c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m \u0111\u0169a, L\u00e0 ng\u00e0 c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m nh\u00e0 d\u00e2n d\u1ee5ng, \u00edt b\u1ecb m\u1ed1i m\u1ecdt (l\u1edbp cu tin h\u00f3a tr\u00ean th\u00e2n d\u1ea7y). Tre c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n ngay khi khai th\u00e1c b\u1eb1ng c\u00e1c bi\u1ec7n ph\u00e1p th\u00f4ng th\u01b0\u1eddng nh\u01b0 ng\u00e2m trong n\u01b0\u1edbc, trong b\u00f9n ho\u1eb7c d\u00f9ng h\u00f3a ch\u1ea5t XM5. Th\u00e2n tre d\u1ec5 ng\u1ea5m thu\u1ed1c b\u1ea3o qu\u1ea3n t\u1eeb ph\u00eda ru\u1ed9t v\u00e0o sau khi \u0111\u00e3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf l\u1edbp m\u00e0ng l\u1ee5a.<\/p>\n

S\u1ee3i tre d\u00e0i nh\u01b0ng t\u1ef7 l\u1ec7 xenlulo th\u1ea5p (V\u1ea7u ng\u1ecdt, Mai \u1ed1ng) ho\u1eb7c trung b\u00ecnh (L\u00e0 ng\u00e0), hi\u1ec7u su\u1ea5t b\u1ed9t gi\u1ea5y kh\u00f4ng cao, c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m nguy\u00ean li\u1ec7u gi\u1ea5y c\u00f3 y\u00eau c\u1ea7u dai ho\u1eb7c tr\u1ed9n v\u1edbi s\u1ee3i g\u1ed7 \u0111\u1ec3 t\u0103ng ch\u1ea5t l\u01b0\u1ee3ng gi\u1ea5y. H\u00e0m l\u01b0\u1ee3ng lignin, pentoza trung b\u00ecnh n\u00ean kh\u00f4ng kh\u00f3 kh\u0103n trong s\u1ea3n xu\u1ea5t s\u1ee3i.<\/p>\n

* Tre H\u00f3p \u0111\u00e1 (<\/b>Bambusa disemulator <\/i><\/b>McClure), D\u00f9ng ph\u1ea5n (Bambusa chungii <\/i>McClure<\/b>) <\/b>l\u00e0 2 lo\u00e0i tre c\u00f3 \u0111\u01b0\u1eddng k\u00ednh th\u00e2n trung b\u00ecnh (5-7cm). T\u1ea1i \u0111\u1ed1t th\u1ee9 8 t\u1eeb g\u1ed1c l\u00ean, \u0111\u1ed9 d\u1ea7y v\u00e1ch th\u00e2n c\u1ee7a H\u00f3p \u0111\u00e1 (1,1 cm), c\u1ee7a D\u00f9ng ph\u1ea5n (0,5cm). B\u00f3 m\u1ea1ch \u1edf H\u00f3p \u0111\u00e1 v\u00e0 D\u00f9ng ph\u1ea5n thu\u1ed9c lo\u1ea1i 3 v\u1edbi m\u1ed9t b\u00f3 m\u1ea1ch trung t\u00e2m v\u00e0 1 b\u00f3 s\u1ee3i n\u1eb1m ph\u00eda trong c\u1ee7a b\u00f3 m\u1ea1ch trung t\u00e2m. T\u1eeb 2\/3 v\u00e1ch th\u00e2n v\u00e0o trong, s\u1ee3i \u1edf c\u00e1c b\u00f3 s\u1ee3i c\u00f3 v\u00e1ch m\u1ecfng n\u00ean c\u00f3 kh\u00e1c bi\u1ec7t l\u1edbn v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c khi so s\u00e1nh v\u1edbi ph\u1ea7n g\u1ea7n c\u1eadt. \u1ede bi\u1ec3u b\u00ec th\u00e2n tre, t\u1ebf b\u00e0o ng\u1eafn nhi\u1ec1u, d\u1ec5 th\u1ea5y, t\u1ebf b\u00e0o cork l\u1edbn h\u01a1n t\u1ebf b\u00e0o silica. Kh\u00ed kh\u1ed5ng d\u1ec5 th\u1ea5y v\u00e0 c\u00f3 khi t\u1eadp h\u1ee3p 2-3 kh\u00ed kh\u1ed5ng c\u1ea1nh nhau (H\u00f3p \u0111\u00e1) hay \u00edt v\u00e0 kh\u00f3 th\u1ea5y (D\u00f9ng ph\u1ea5n) . T\u1ebf b\u00e0o d\u00e0i d\u00e0i v\u00e0 h\u1eb9p v\u00e1ch th\u1eb3ng t\u1edbi h\u01a1i l\u01b0\u1ee3n s\u00f3ng (H\u00f3p \u0111\u00e1) hay d\u00e0i v\u00e0 r\u1ed9ng (D\u00f9ng ph\u1ea5n). Kh\u00f4ng th\u1ea5y l\u00f4ng to, l\u00f4ng nh\u1ecf. T\u1ebf b\u00e0o b\u1ecdt kh\u00ed kh\u00f3 th\u1ea5y, th\u01b0\u1eddng t\u1eadp trung \u1edf c\u1ea1nh kh\u00ed kh\u1ed5ng. Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch l\u1ea7n l\u01b0\u1ee3t l\u00e0 0,73 v\u00e0 0,71 g\/cm3<\/sup>.<\/p>\n

Tre H\u00f3p \u0111\u00e1 v\u00e0 D\u00f9ng ph\u1ea5n c\u00f3 \u0111\u1ed9 co r\u00fat th\u1ec3 t\u00edch c\u1ea3 ph\u1ea7n m\u1eaft v\u00e0 ph\u1ea7n l\u00f3ng th\u1ea5p n\u00ean thu\u1eadn l\u1ee3i trong qu\u00e1 tr\u00ecnh ph\u01a1i, s\u1ea5y, c\u00f3 th\u1ec3 ph\u01a1i n\u01a1i d\u00e2m m\u00e1t. Ph\u1ea7n l\u00f3ng tre th\u01b0\u1eddng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c t\u1ed1t h\u01a1n ph\u1ea7n m\u1eaft \u0111\u1eb7c bi\u1ec7t l\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu k\u00e9o; \u1ee9ng su\u1ea5t n\u00e9n d\u1ecdc th\u1edb \u1edf ph\u1ea7n l\u00f3ng v\u00e0 ph\u1ea7n m\u1eaft c\u1ee7a 2 lo\u00e0i t\u01b0\u01a1ng \u1ee9ng l\u00e0: 68 v\u00e0 68, 61 v\u00e0 55MPa; \u1ee9ng su\u1ea5t k\u00e9o d\u1ecdc th\u1edb t\u01b0\u01a1ng \u1ee9ng l\u00e0: 361 v\u00e0 76, 347 v\u00e0 132 MPa; \u1ee9ng su\u1ea5t u\u1ed1n t\u0129nh ti\u1ebfp tuy\u1ebfn t\u01b0\u01a1ng \u1ee9ng l\u00e0: 169 v\u00e0 129, 185 v\u00e0 129 MPa; \u1ee9ng su\u1ea5t tr\u01b0\u1ee3t d\u1ecdc th\u1edb t\u01b0\u01a1ng \u1ee9ng l\u00e0: 7,1 v\u00e0 5,0, 5,7 v\u00e0 4,3 MPa. H\u00f3p \u0111\u00e1 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c \u1edf m\u1ee9c cao n\u00ean c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng v\u00e0o m\u1ed9t s\u1ed1 c\u00f4ng vi\u1ec7c c\u1ea7n \u0111\u1ed9 d\u1ebbo dai nh\u01b0 l\u00e0m \u0111\u00f2n tay, s\u00e0o ch\u1ed1ng. D\u00f9ng ph\u1ea5n c\u00f3 v\u00e1ch th\u00e2n m\u1ecfng n\u00ean ch\u1ee7 y\u1ebfu d\u00f9ng v\u00e0o c\u00f4ng vi\u1ec7c \u0111an l\u00e1t. Tre c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n ngay khi khai th\u00e1c b\u1eb1ng c\u00e1c bi\u1ec7n ph\u00e1p th\u00f4ng th\u01b0\u1eddng nh\u01b0 ng\u00e2m trong n\u01b0\u1edbc, trong b\u00f9n ho\u1eb7c d\u00f9ng h\u00f3a ch\u1ea5t XM5. Th\u00e2n tre d\u1ec5 ng\u1ea5m thu\u1ed1c b\u1ea3o qu\u1ea3n t\u1eeb ph\u00eda ru\u1ed9t v\u00e0o sau khi \u0111\u00e3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf l\u1edbp m\u00e0ng l\u1ee5a.<\/p>\n

S\u1ee3i tre d\u00e0i v\u00e0 t\u1ef7 l\u1ec7 xenlulo cao n\u00ean c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m nguy\u00ean li\u1ec7u gi\u1ea5y c\u00f3 y\u00eau c\u1ea7u dai ho\u1eb7c tr\u1ed9n v\u1edbi s\u1ee3i g\u1ed7 \u0111\u1ec3 t\u0103ng ch\u1ea5t l\u01b0\u1ee3ng gi\u1ea5y. H\u00e0m l\u01b0\u1ee3ng lignin, pentoza trung b\u00ecnh n\u00ean kh\u00f4ng kh\u00f3 kh\u0103n trong s\u1ea3n xu\u1ea5t s\u1ee3i.<\/p>\n

3.3. Ch\u01b0\u01a1ng tr\u00ecnh l\u01b0u tr\u1eef v\u00e0 tra c\u1ee9u \u201cT\u00ean g\u1ecdi v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7, tre Vi\u1ec7t Nam\u201d<\/b><\/p>\n

Ph\u1ea7n m\u1ec1m ch\u01b0\u01a1ng tr\u00ecnh l\u01b0u tr\u1eef v\u00e0 tra c\u1ee9u \u201cT\u00ean g\u1ecdi v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7, tre Vi\u1ec7t Nam\u201d l\u00e0 ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean n\u1ec1n c\u00f4ng ngh\u1ec7 DotNet 2008 c\u1ee7a t\u1eadp \u0111o\u00e0n Microsoft \u0111\u1ea3m b\u1ea3o c\u00e1c t\u00ednh n\u0103ng sau:<\/p>\n

+ L\u01b0u tr\u1eef th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u00e1c lo\u00e0i g\u1ed7 v\u00e0 tre Vi\u1ec7t Nam<\/p>\n

+ T\u00ecm th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 t\u00ean v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7 theo m\u1ed9t t\u00ean g\u1ecdi<\/p>\n

+ T\u00ecm th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 t\u00ean v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7 theo \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o hi\u1ec3n vi c\u1ee7a g\u1ed7<\/p>\n

+ T\u00ecm th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 t\u00ean v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7 theo t\u00ednh ch\u1ea5t g\u1ed7<\/p>\n

+ T\u00ecm th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 t\u00ean v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7 t\u1eeb k\u1ebft h\u1ee3p gi\u1eefa \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u t\u1ea1o v\u00e0 t\u00ednh ch\u1ea5t g\u1ed7<\/p>\n

Ph\u1ea7n m\u1ec1m hi\u1ec7n c\u00f3 d\u1eef li\u1ec7u c\u1ee7a 130 lo\u00e0i g\u1ed7 v\u00e0 tre Vi\u1ec7t Nam.<\/p>\n

IV. K\u1ebft lu\u1eadn v\u00e0 ki\u1ebfn ngh\u1ecb: <\/b><\/p>\n

– C\u00e1c nghi\u00ean c\u1ee9u v\u1ec1 c\u1ea5u t\u1ea1o, \u0111\u1eb7c t\u00ednh g\u1ed7, tre c\u1ee7a Vi\u1ec7t Nam \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1eeb l\u00e2u \u1edf 3 \u0111\u01a1n v\u1ecb nghi\u00ean c\u1ee9u ch\u00ednh l\u00e0 Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc L\u00e2m nghi\u1ec7p, Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc N\u00f4ng L\u00e2m th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh, nh\u1eefng k\u1ebft qu\u1ea3 n\u00e0y \u0111\u00e3 g\u00f3p ph\u1ea7n qu\u1ea3n l\u00fd v\u00e0 s\u1eed d\u1ee5ng ngu\u1ed3n t\u00e0i nguy\u00ean c\u00e2y g\u1ed7 v\u00e0 tre trong nh\u1eefng n\u0103m qua. Tuy nhi\u00ean do s\u1ef1 tr\u00f9ng l\u1eb7p \u1edf c\u00e1c c\u01a1 quan nghi\u00ean c\u1ee9u, ch\u1ea5t l\u01b0\u1ee3ng kh\u00f4ng \u0111\u1ea3m b\u1ea3o v\u00e0 nhi\u1ec1u t\u00ednh ch\u1ea5t ch\u01b0a \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u ho\u1eb7c s\u1ed1 li\u1ec7u\u00a0 c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c ch\u01b0a cao. V\u00ec v\u1eady c\u00e1c k\u1ebft qu\u1ea3 \u0111\u00e3 c\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p chi ti\u1ebft, \u0111\u00e1nh gi\u00e1 s\u1eed d\u1ee5ng v\u00e0 c\u00f4ng b\u1ed1; T\u1eeb \u0111\u00f3 x\u00e2y d\u1ef1ng \u0111\u1ecbnh h\u01b0\u1edbng v\u00e0 k\u1ebf ho\u1ea1ch cho nghi\u00ean c\u1ee9u v\u1ec1 khoa h\u1ecdc g\u1ed7 v\u00e0 tre Vi\u1ec7t Nam.<\/p>\n

– K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u 5 lo\u00e0i tre v\u00e0 10 lo\u00e0i g\u1ed7 \u0111\u00e3 cung c\u1ea5p th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7, \u0111\u1ea3m b\u1ea3o ch\u00ednh x\u00e1c v\u1ec1 c\u1ea5u t\u1ea1o, \u0111\u1eb7c t\u00ednh g\u1ed7, tre cho ch\u1ebf bi\u1ebfn, b\u1ea3o qu\u1ea3n v\u00e0 s\u1eed d\u1ee5ng nh\u1eefng lo\u00e0i g\u1ed7 v\u00e0 tre n\u00e0y. C\u00f4ng vi\u1ec7c nghi\u00ean c\u1ee9u c\u1ea5u t\u1ea1o v\u00e0 \u0111\u1eb7c t\u00ednh c\u01a1 b\u1ea3n c\u1ea3u g\u1ed7 v\u00e0 tre c\u1ea7n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 th\u01b0\u1eddng xuy\u00ean \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a qu\u1ea3n l\u00fd, s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng.<\/p>\n

– Ch\u01b0\u01a1ng tr\u00ecnh l\u01b0u tr\u1eef v\u00e0 tra c\u1ee9u \u201cT\u00ean g\u1ecdi v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7, tre Vi\u1ec7t Nam\u201d c\u00f3 t\u00ednh n\u0103ng l\u01b0u tr\u1eef c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a c\u00e1c lo\u00e0i g\u1ed7 v\u00e0 tre v\u1ec1 t\u00ean g\u1ecdi v\u00e0 \u0111\u1eb7c t\u00ednh g\u1ed7 \u0111\u1ed3ng th\u1eddi gi\u00fap cho tra c\u1ee9u c\u00e1c th\u00f4ng tin nhanh ch\u00f3ng. Ph\u1ea7n m\u1ec1m kh\u00f4ng thua k\u00e9m c\u00e1c ph\u1ea7n m\u1ec1m t\u01b0\u01a1ng t\u1ef1 \u1edf m\u1ed9t s\u1ed1 ph\u00f2ng nghi\u00ean c\u1ee9u khoa h\u1ecdc g\u1ed7 tr\u00ean th\u1ebf gi\u1edbi v\u00e0 \u1edf Vi\u1ec7t Nam. Ch\u01b0\u01a1ng tr\u00ecnh c\u1ea7n \u0111\u01b0\u1ee3c ti\u1ebfp t\u1ee5c c\u1eadp nh\u1eadt c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 n\u00e2ng c\u1ea5p b\u1ea3o m\u1eadt, kh\u1ea3 n\u0103ng li\u00ean k\u1ebft internet.<\/p>\n

– Cu\u1ed1n \u201c\u00c1t-l\u00e1t c\u1ea5u t\u1ea1o, t\u00ednh ch\u1ea5t g\u1ed7 v\u00e0 tre Vi\u1ec7t Nam\u201d v\u00e0 cu\u1ed1n s\u00e1ch \u201cC\u00e1c lo\u1ea1i g\u1ed7 th\u00f4ng d\u1ee5ng \u1edf Vi\u1ec7t Nam\u201d \u0111\u00e3 cung c\u1ea5p nh\u1eefng th\u00f4ng tin quan tr\u1ecdng v\u1ec1 c\u1ea5u t\u1ea1o, \u0111\u1eb7c t\u00ednh gi\u00fap cho ng\u01b0\u1eddi qu\u1ea3n l\u00fd v\u00e0 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c thu\u1eadn ti\u1ec7n. C\u00e1c ph\u1ea7n ti\u1ebfp theo c\u1ea7n \u0111\u01b0\u1ee3c bi\u00ean so\u1ea1n v\u00e0 xu\u1ea5t b\u1ea3n.<\/p>\n","protected":false},"excerpt":{"rendered":"

I. \u0110\u1eb6T V\u1ea4N \u0110\u1ec0: Nghi\u00ean c\u1ee9u, x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 ho\u00e1 h\u1ecdc g\u1ed7 l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 quan tr\u1ecdng trong khoa h\u1ecdc g\u1ed7 n\u00f3i ri\u00eang v\u00e0 trong nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 gi\u00e1 tr\u1ecb t\u00e0i nguy\u00ean r\u1eebng n\u00f3i chung. K\u1ebft qu\u1ea3 x\u00e1c \u0111\u1ecbnh t\u00ednh ch\u1ea5t v\u1eadt l\u00fd, c\u01a1 h\u1ecdc v\u00e0 ho\u00e1 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13664"}],"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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/comments?post=13664"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13664\/revisions"}],"predecessor-version":[{"id":13667,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/13664\/revisions\/13667"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=13664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=13664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=13664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}