{"id":8614,"date":"2009-03-24T02:29:48","date_gmt":"2009-03-23T19:29:48","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/buoc-dau-tim-hieu-mot-so-dac-diem-sinh-thai-va-kha-nang-gay-trong-loai-cam-xe-xylia-xylocarpa-o-cac-tinh-phia-nam\/"},"modified":"2019-09-25T10:10:53","modified_gmt":"2019-09-25T03:10:53","slug":"buoc-dau-tim-hieu-mot-so-dac-diem-sinh-thai-va-kha-nang-gay-trong-loai-cam-xe-xylia-xylocarpa-o-cac-tinh-phia-nam","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/buoc-dau-tim-hieu-mot-so-dac-diem-sinh-thai-va-kha-nang-gay-trong-loai-cam-xe-xylia-xylocarpa-o-cac-tinh-phia-nam\/","title":{"rendered":"B\u01b0\u1edbc \u0111\u1ea7u t\u00ecm hi\u1ec3u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i v\u00e0 kh\u1ea3 n\u0103ng g\u00e2y tr\u1ed3ng lo\u00e0i C\u0103m xe (Xylia xylocarpa) \u1edf c\u00e1c t\u1ec9nh ph\u00eda nam"},"content":{"rendered":"

V\u01b0\u01a1ng H\u1eefu Nhi<\/em><\/h1>\n

Nghi\u00ean c\u1ee9u sinh kho\u00e1 10<\/p>\n

Vi\u1ec7n khoa h\u1ecdc LN Vi\u1ec7t Nam<\/p>\n

C\u0103m xe (Xylia xylocarpa <\/em>Roxb) Taub) c\u00f2n g\u1ecdi l\u00e0 C\u1ea9m xe thu\u1ed9c h\u1ecd \u0110\u1eadu (Fabaceae<\/em>), h\u1ecd ph\u1ee5 trinh n\u1eef (Mimosoideae<\/em>), ng\u00e0nh M\u1ed9c lan (Magnoliophyta<\/em>), m\u1ecdc t\u1ef1 nhi\u00ean \u1edf nhi\u1ec1u n\u01b0\u1edbc Ch\u00e2u \u00e1: \u1ea5n \u0110\u1ed9 , Myanma, Th\u00e1i Lan, L\u00e0o, Campuchia v\u00e0 Vi\u1ec7t Nam.<\/p>\n

C\u0103m xe l\u00e0 lo\u00e0i c\u00e2y \u0111a t\u00e1c d\u1ee5ng, thu\u1ed9c nh\u00f3m II, g\u1ed7 n\u1eb7ng, c\u1ee9ng, kh\u00f4ng b\u1ecb m\u1ed1i m\u1ecdt, d\u00f9ng \u0111\u00f3ng \u0111\u1ed3 gia d\u1ee5ng, x\u00e2y d\u1ef1ng, \u0111\u00f3ng t\u00e0u, toa t\u00e0u l\u1eeda, b\u00e1nh xe b\u00f2, c\u1ed9t \u0111i\u1ec7n, tr\u1ee5 ti\u00eau…c\u00f3 gi\u00e1 tr\u1ecb cao tr\u00ean th\u1ecb tr\u01b0\u1eddng trong n\u01b0\u1edbc v\u00e0 xu\u1ea5t kh\u1ea9u.<\/p>\n

V\u1ecf d\u00f9ng l\u00e0m thu\u1ed1c ch\u1eefa b\u1ec7nh ho ra m\u00e1u, ti\u00eau ch\u1ea3y, l\u1eadu, h\u1ea1t gi\u00e0u pr\u00f4t\u00eain v\u00e0 ch\u1ea5t b\u00e9o, c\u00f3 th\u1ec3 rang \u0103n \u0111\u01b0\u1ee3c.<\/p>\n

C\u0103m xe l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba m\u1ecdc t\u1ef1 nhi\u00ean kh\u00e1 ph\u1ed5 bi\u1ebfn \u1edf nhi\u1ec1u t\u1ec9nh ph\u00eda Nam, c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh h\u1ea1t, ch\u1ed3i th\u00e2n v\u00e0 ch\u1ed3i r\u1ec5 r\u1ea5t m\u1ea1nh l\u1ea1i c\u00f3 ngu\u1ed3n h\u1ea1t gi\u1ed1ng phong ph\u00fa v\u00e0 c\u0169ng \u0111\u00e3 tr\u1ed3ng th\u1eed c\u00f3 k\u1ebft qu\u1ea3 \u1edf m\u1ed9t v\u00e0i n\u01a1i. Tuy nhi\u00ean, cho \u0111\u1ebfn nay C\u0103m xe \u0111\u00e3 b\u1ecb khai th\u00e1c ki\u1ec7t qu\u1ec7 v\u00e0 c\u00e1c nghi\u00ean c\u1ee9u lo\u00e0i c\u00e2y n\u00e0y c\u00f2n r\u1ea5t \u00edt. Do v\u1eady vi\u1ec7c nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i v\u00e0 kh\u1ea3 n\u0103ng g\u00e2y tr\u1ed3ng l\u00e0m c\u0103n c\u1ee9 cho vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt l\u00e2m sinh \u0111\u1ec3 t\u00e1i sinh ph\u1ee5c h\u1ed3i v\u00e0 tr\u1ed3ng r\u1eebng C\u0103m xe l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft, c\u00f3 \u00fd ngh\u0129a khoa h\u1ecdc v\u00e0 th\u1ef1c ti\u1ec5n, g\u00f3p ph\u1ea7n th\u1ef1c hi\u1ec7n d\u1ef1 \u00e1n Qu\u1ed1c gia v\u1ec1 tr\u1ed3ng m\u1edbi 5 tri\u1ec7u ha r\u1eebng.<\/p>\n

1.\u0110\u1ed1i t\u01b0\u1ee3ng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u:<\/strong><\/p>\n

1.1.\u0110\u1ed1i t\u01b0\u1ee3ng:<\/em><\/strong><\/p>\n

C\u00e1c qu\u1ea7n th\u1ec3 r\u1eebng t\u1ef1 nhi\u00ean c\u00f3 C\u0103m xe ph\u00e2n b\u1ed1 \u1edf c\u00e1c t\u1ec9nh DakLak, Kh\u00e1nh Ho\u00e0, \u0110\u1ed3ng Nai .<\/p>\n

C\u00e1c r\u1eebng C\u0103m xe tr\u1ed3ng th\u1ef1c nghi\u1ec7m \u1edf Eakmat (DakLak) v\u00e0 Lang Hanh (L\u00e2m \u0110\u1ed3ng).<\/p>\n

1.2.Ph\u01b0\u01a1ng ph\u00e1p: <\/em><\/strong><\/p>\n

\u0110i\u1ec1u tra l \u00f4 ti\u00eau chu\u1ea9n \u0111i\u1ec3n h\u00ecnh s\u01a1 c\u1ea5p 2.500m2<\/sup> (50 x50m) v\u00e0 \u00f4 th\u1ee9 c\u1ea5p 100m2<\/sup> (10x10m) \u0111\u01b0\u1ee3c l\u1eadp trong c\u00e1c \u00f4 s\u01a1 c\u1ea5p, v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau c\u01a1 b\u1ea3n theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u01b0\u1eddng d\u00f9ng trong l\u00e2m nghi\u1ec7p.<\/p>\n

\u0110\u00e0o ph\u1eabu di\u1ec7n \u0111i\u1ec3n h\u00ecnh v\u00e0 l\u1ea5y m\u1eabu \u0111\u1ea5t trong c\u00e1c \u00f4 s\u01a1 c\u1ea5p, ph\u00e2n t\u00edch \u0111\u1ea5t theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ch\u00ednh qui v\u00e0 th\u00f4ng d\u1ee5ng \u1edf trong ph\u00f2ng.<\/p>\n

T\u00ednh t\u1ed5 th\u00e0nh lo\u00e0i theo ph\u1ea7n tr\u0103m gi\u00e1 tr\u1ecb s\u1ed1 quan tr\u1ecdng IV% (Important value) (Curtis Mc Intosh,1951) v\u00e0 lo\u00e0i \u01b0u th\u1ebf b\u1eb1ng h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan r(quan h\u1ec7 t\u01b0\u01a1ng quan) v\u00e0 ti\u00eau ch\u1ea9n c2 <\/sup>(ki\u1ec3m tra t\u00ednh \u0111\u1ed9c l\u1eadp ) c\u1ee7a lo\u00e0i.<\/p>\n

C\u00e1c t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean m\u00e1y vi t\u00ednh v\u1edbi ph\u1ea7n m\u1ec1m Excel 5.0.<\/p>\n

2.K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u:<\/strong><\/p>\n

2.1. Ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean.<\/em><\/strong><\/p>\n

C\u00e1c k\u1ebft qu\u1ea3 \u0111i\u1ec1u tra qu\u1ea7n th\u1ec3 r\u1eebng t\u1ef1 nhi\u00ean \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft trong b\u1ea3ng 1. K\u1ebft qu\u1ea3 cho th\u1ea5y:<\/p>\n

B\u1ea3ng1<\/strong><\/p>\n\n\n\n\n\n\n\n\n
\u0110\u1ecba \u0111i\u1ec3m<\/strong><\/td>\nTo\u1ea1 \u0111\u1ed9 \u0111\u1ecba l\u00fd<\/strong><\/td>\n\u0110\u1ecba h\u00ecnh<\/strong><\/td>\n\u0110\u1eb7c tr\u01b0ng r\u1eebng C\u0103m xe<\/strong><\/td>\n<\/tr>\n
\u0110\u1ed9cao<\/strong><\/p>\n

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

\u0110\u1ed9 d\u1ed1c<\/strong><\/td>\nKi\u1ec3u r\u1eebng<\/strong><\/td>\nC\u00e2y\/ha<\/strong><\/td>\n(m)<\/strong><\/td>\n(cm)<\/strong><\/td>\n<\/tr>\n
Yokdon<\/p>\n

(DakLak)<\/td>\n

100<\/sup>45\u2019-130<\/sup>05\u2019 v\u0129 B\u1eafc<\/p>\n

1070<\/sup>29;1070<\/sup>50\u2019k\/\u0110\u00f4ng<\/td>\n

150<\/td>\n2-50<\/sup><\/td>\nKh\u1ed9p<\/td>\n5-10<\/td>\n16-18<\/td>\n25-30<\/td>\n<\/tr>\n
Eavy<\/p>\n

(DakLak)<\/td>\n

130<\/sup>00-130<\/sup>50\u2019 v\u0129 B\u1eafc<\/p>\n

1070<\/sup>29;1070<\/sup>50\u2019\u0110\u00f4ng<\/td>\n

600<\/td>\n5-100<\/sup><\/td>\nB\u00e1n th\u01b0\u1eddng xanh<\/td>\n5-10<\/td>\n18-22<\/td>\n25-30<\/td>\n<\/tr>\n
NinhHo\u00e0<\/p>\n

(Kh\u00e1nh Ho\u00e0)<\/td>\n

120<\/sup>15\u2019-120<\/sup>30\u2019 v\u0129 B\u1eafc<\/p>\n

1090<\/sup>00-1090<\/sup>15\u2019 k\/\u0110\u00f4ng<\/td>\n

100<\/td>\n2-5<\/td>\nThu\u1ea7n lo\u00e0i<\/td>\n300-400<\/td>\n12-15<\/td>\n20-25<\/td>\n<\/tr>\n
C\u00e1t Ti\u00ean<\/p>\n

(\u0110\u1ed3ng Nai)<\/td>\n

110<\/sup>21\u2019-110<\/sup>33\u2019 v\u0129 B\u1eafc<\/p>\n

1070<\/sup>10-1070<\/sup>30\u2019 k\/ \u0110\u00f4ng<\/td>\n

150<\/td>\n2-5<\/td>\nB\u00e1n th\u01b0\u1eddng xanh<\/td>\n5-10<\/td>\n22-25<\/td>\n30-35<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u0103m xe ph\u00e2n b\u1ed1 kh\u00e1 r\u1ed9ng \u1edf c\u00e1c t\u1ec9nh Nam Trung B\u1ed9, \u0110\u00f4ng Nam B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean trong gi\u1edbi h\u1ea1n kho\u1ea3ng 2 v\u0129 \u0111\u1ed9 B\u1eafc (12\u2013140<\/sup>) v\u00e0 2 kinh \u0111\u1ed9 \u0110\u00f4ng (107-1080<\/sup> ) c\u00f3 m\u1eb7t trong c\u00e1c ki\u1ec3u r\u1eebng r\u1ee5ng l\u00e1 (kh\u1ed9p), r\u1eebng b\u00e1n th\u01b0\u1eddng xanh h\u1ed7n lo\u00e0i v\u00e0 thu\u1ea7n lo\u00e0i. \u0110\u00f3 c\u0169ng l\u00e0 c\u0103n c\u1ee9 \u0111\u1ec3 ch\u1ecdn v\u00f9ng tr\u1ed3ng v\u00e0 tr\u1ea1ng th\u00e1i r\u1eebng \u0111\u1ec3 t\u00e1i sinh ph\u1ee5c h\u1ed3i lo\u00e0i C\u0103m xe ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n sinh th\u00e1i c\u1ee7a n\u00f3.<\/p>\n

2.2.\u0110\u1eb7c \u0111i\u1ec3m \u0111\u1ea5t \u0111ai:<\/em><\/strong><\/p>\n

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra v\u00e0 ph\u00e2n t\u00edch \u0111\u1ea5t ghi trong b\u1ea3ng 2. K\u1ebft qu\u1ea3 tr\u00ean cho th\u1ea5y:<\/p>\n

B\u1ea3ng 2:<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1ecba \u0111i\u1ec3m<\/strong><\/td>\nYok D\u00f4n (YD2)<\/strong><\/td>\nEa kmat (EKM9)<\/strong><\/td>\nNinh Ho\u00e0 (Nk8)<\/strong><\/td>\n<\/tr>\n
Lo\u1ea1i \u0111\u1ea5t<\/td>\nX\u00e1m v\u00e0ng \/ Granit<\/td>\n\u0110\u1ecf \/ Ba zan<\/td>\nv\u00e0ng x\u00e1m \/ liparit<\/td>\n<\/tr>\n
T\u1ea7ng d\u00e0y (cm)<\/td>\n30-35<\/td>\n>100<\/td>\n80-100<\/td>\n<\/tr>\n
\u0110\u00e1 l\u1eabn(%)<\/td>\n40-70<\/td>\n5-10<\/td>\n20-30<\/td>\n<\/tr>\n
\u0110\u1ed9 s\u00e2u(cm)<\/td>\n0-20<\/td>\n40-60<\/td>\n80-100<\/td>\n0-20<\/td>\n40-60<\/td>\n80-100<\/td>\n0-20<\/td>\n40-60<\/td>\n80-100<\/td>\n<\/tr>\n
S\u00e9t(<0.002mm)%<\/td>\n12.9<\/td>\n20.8<\/td>\n23.0<\/td>\n63.2<\/td>\n63.9<\/td>\n64.8<\/td>\n22.0<\/td>\n26.9<\/td>\n23.6<\/td>\n<\/tr>\n
M\u00f9n (%)<\/td>\n1.07<\/td>\n0.71<\/td>\n0.31<\/td>\n4.52<\/td>\n3.41<\/td>\n1.41<\/td>\n1.74<\/td>\n0.89<\/td>\n0.67<\/td>\n<\/tr>\n
N (%)<\/td>\n0.08<\/td>\n0.06<\/td>\n0.03<\/td>\n0.18<\/td>\n0.10<\/td>\n0.06<\/td>\n0.17<\/td>\n0.14<\/td>\n0.11<\/td>\n<\/tr>\n
P2<\/sub>O5<\/sub>(%)<\/td>\n0.046<\/td>\n0.018<\/td>\n0.016<\/td>\n0.214<\/td>\n0.171<\/td>\n0.096<\/td>\n0.021<\/td>\n0.014<\/td>\n0.017<\/td>\n<\/tr>\n
K2<\/sub>O(%)<\/td>\n0.21<\/td>\n0.44<\/td>\n0.15<\/td>\n0.02<\/td>\n0.02<\/td>\n0.02<\/td>\n0.08<\/td>\n0.08<\/td>\n0.10<\/td>\n<\/tr>\n
pHkcl<\/td>\n3.96<\/td>\n3.73<\/td>\n3.79<\/td>\n3.90<\/td>\n3.93<\/td>\n4.28<\/td>\n5.46<\/td>\n5.85<\/td>\n7.14<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u0103m xe c\u00f3 th\u1ec3 s\u1ed1ng tr\u00ean nhi\u1ec1u lo\u1ea1i \u0111\u1ea5t: x\u00e1m, v\u00e0ng, \u0111\u1ecf ph\u00e1t tri\u1ec3n tr\u00ean nhi\u1ec1u lo\u1ea1i \u0111\u00e1 nh\u01b0 granit, liparit, bazan…c\u00f3 t\u1ea7ng d\u00e0y, m\u1ecfng v\u00e0 t\u1ec9 l\u1ec7 \u0111\u00e1 l\u1eabn kh\u00e1c nhau. \u0110\u1ea5t c\u00f3 th\u00e0nh ph\u1ea7n c\u01a1 gi\u1edbi th\u1ecbt trung b\u00ecnh \u0111\u1ebfn s\u00e9t nh\u1eb9, ph\u1ea3n \u1ee9ng chua \u0111\u1ebfn \u00edt chua, m\u00f9n v\u00e0 N t\u1eeb \u00edt \u0111\u1ebfn trung b\u00ecnh.<\/p>\n

Nh\u01b0 v\u1eady C\u0103m xe c\u0169ng kh\u00f4ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe v\u1ec1 \u0111i\u1ec1u ki\u1ec7n \u0111\u1ea5t \u0111ai.<\/p>\n

2.3.Lo\u00e0i c\u00e2y \u01b0u th\u1ebf : <\/em><\/strong><\/p>\n

B\u1ea3ng 3:<\/strong><\/p>\n\n\n\n\n\n\n\n\n
\u00d4 TC<\/strong><\/td>\nLo\u00e0i \u01b0u th\u1ebf<\/strong><\/td>\nF%<\/strong><\/td>\nN%<\/strong><\/td>\nG%<\/strong><\/td>\nIV%<\/strong><\/td>\n<\/tr>\n
\u00d41<\/p>\n

(Yokdon)<\/td>\n

C\u0103m xe Chi\u00eau li\u00eau Gi\u00e1ng h\u01b0\u01a1ng<\/td>\n34,3 31,4 11,4<\/td>\n34,9 34,9 11,1<\/td>\n38,0 32,0 18,4<\/td>\n35,7<\/u> 32,8 13,6<\/td>\n<\/tr>\n
\u00d42<\/p>\n

(Yokdon)<\/td>\n

Chi\u00eau li\u00eau C\u0103m xe<\/p>\n

C\u00e0 ch\u00edt<\/td>\n

36,2 27,7 12,8<\/td>\n47,8 22,8 12,0<\/td>\n14,4 34,8 6,8<\/td>\n42,8 28,4<\/u> 10,5<\/td>\n<\/tr>\n
\u00d43<\/p>\n

(Yokdon)<\/td>\n

C\u00e0 ch\u00edt<\/p>\n

C\u0103m xe C\u00e2m li\u00eau Chi\u00eau li\u00eau<\/td>\n

35,2 20,4 24,1 13,0<\/td>\n52,9 16,5 17,7 8,2<\/td>\n39,8 26,9 17,3 5,8<\/td>\n33,8 21,3<\/u> 19,7 9,0<\/td>\n<\/tr>\n
\u00d45 (C\u00e1t Ti\u00ean)<\/td>\nB\u1eb1ng l\u0103ng<\/p>\n

C\u0103m xe D\u1ebd<\/p>\n

Binh linh<\/td>\n

39,0 13,6 11,9 10,2<\/td>\n52,4 12,2 9,8 7,3<\/td>\n75,6 13,0 2,2 2,0<\/td>\n55,7 12,9<\/u> 8,0 6,5<\/td>\n<\/tr>\n
\u00d46 (EAWY)<\/td>\nB\u1eb1ng l\u0103ng<\/p>\n

C\u0103m xe<\/p>\n

B\u1eb1ng l\u0103ng t\u00edm<\/p>\n

G\u1ee5 m\u1eadt<\/p>\n

K\u01a1 nia<\/td>\n

28,8 21,2 7,7 5,8 3,8<\/td>\n30,5 20,3 10,2 5,01 3,4<\/td>\n42,2 18,0 6,0 8,8 9,4<\/td>\n33 19,8<\/u> 8,0 6,6 5,5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nh\u01b0 v\u1eady \u1edf c\u00e1c l\u00e2m ph\u1ea7n nghi\u00ean c\u1ee9u lu\u00f4n ch\u1ec9 c\u00f3 t\u1eeb 3-5 lo\u00e0i \u01b0u th\u1ebf c\u00f3 gi\u00e1 tr\u1ecb quan tr\u1ecdng IV%>5%; trong \u0111\u00f3 c\u00f3 C\u0103m xe, quy\u1ebft \u0111\u1ecbnh t\u1ed5 th\u00e0nh \u0111\u01b0\u1ee3c coi l\u00e0 nh\u00f3m lo\u00e0i \u01b0u th\u1ebf \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong sinh th\u00e1i qu\u1ea7n th\u1ec3.<\/p>\n

2.4.Quan h\u1ec7 nh\u00f3m lo\u00e0i c\u00e2y \u01b0u th\u1ebf:<\/em><\/strong><\/p>\n

Ki\u1ec3m tra m\u1ed1i quan h\u1ec7 c\u1ee7a C\u0103m xe trong nh\u00f3m lo\u00e0i \u01b0u th\u1ebf tr\u00ecnh b\u00e0y \u1edf b\u1ea3ng 4. K\u1ebft qu\u1ea3 tr\u00ean cho th\u1ea5y<\/p>\n

B\u1ea3ng 4<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00d4 ti\u00eau chu\u1ea9n<\/strong><\/td>\nPA<\/strong><\/td>\nPB<\/strong><\/td>\nPAB<\/strong><\/td>\nr<\/strong><\/td>\nc<\/strong>2<\/sup><\/strong>t\u00ednh<\/sub><\/strong><\/td>\nc<\/strong>2<\/sup><\/strong>0.05<\/sub><\/strong><\/td>\nQuan h\u1ec7<\/strong><\/td>\n<\/tr>\n
\u00d41 \u2013 (Yok don)<\/strong><\/td>\n<\/tr>\n
C\u0103m xe \u2013 Chi\u00eau Li\u00eau<\/td>\n0.18<\/td>\n0.54<\/td>\n0.05<\/td>\n-0.24<\/td>\n1.70<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
C\u0103mxe -Gi\u00e1ng H\u01b0\u01a1ng<\/td>\n0.18<\/td>\n0.64<\/td>\n0.09<\/td>\n0.13<\/td>\n0.52<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
\u00d4 3 \u2013 Yok don)<\/strong><\/td>\n<\/td>\n<\/tr>\n
C\u0103m xe \u2013 Chi\u00eau li\u00eau<\/td>\n0.44<\/td>\n0.24<\/td>\n0.08<\/td>\n-0.12<\/td>\n0.34<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
C\u0103m xe \u2013 C\u00e0 ch\u1eafc<\/td>\n0.44<\/td>\n0.80<\/td>\n0.32<\/td>\n-0.16<\/td>\n0.62<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
C\u0103m xe \u2013 C\u1ea9m li\u00ean<\/td>\n0.44<\/td>\n0.520<\/td>\n0.24<\/td>\n0.05<\/td>\n0.04<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
\u00d44 Ea wy<\/strong><\/td>\n<\/td>\n<\/tr>\n
C\u0103m xe \u2013 B\u1eb1ng l\u0103ng<\/td>\n0.42<\/td>\n0.58<\/td>\n0.21<\/td>\n0.14<\/td>\n0.47<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
C\u0103m xe\u2013 B\u1eb1ngl\u0103ngt\u00edm<\/td>\n0.42<\/td>\n0.25<\/td>\n0.04<\/td>\n-0.29<\/td>\n2.00<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
C\u0103m xe\u2013 G\u1ee5 m\u1eadt<\/td>\n0.42<\/td>\n0.13<\/td>\n0.04<\/td>\n-0.06<\/td>\n0.08<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n
C\u0103m xe\u2013K\u01a1 nia<\/td>\n0.42<\/td>\n0.08<\/td>\n0.08<\/td>\n-0.36<\/td>\n2.95<\/td>\n3,84<\/td>\nNg\u1eabu nhi\u00ean<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

M\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c lo\u00e0i trong nh\u1eefng lo\u00e0i \u01b0u th\u1ebf m\u1edbi ch\u1ec9 l\u00e0 quan h\u1ec7 ng\u1eabu nhi\u00ean (c<\/strong>2<\/sup><\/strong>t\u00ednh <\/sub><\/strong>< <\/strong>c<\/strong>2 <\/sup><\/strong>0,05<\/sub><\/strong>b\u1ea3ng\u1ee9ng v\u1edbi b\u1eadc t\u1ef1 do k=”1),” ri\u00eang C\u0103m xe v\u1edbi Gi\u00e1ng h\u01b0\u01a1ng, C\u0103m xe v\u1edbi C\u1ea9m li\u00ean v\u00e0 C\u0103m xe v\u1edbi B\u1eb1ng l\u0103ng c\u00f3 m\u1ed1i quan h\u1ec7 h\u1ed7 tr\u1ee3. (h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan 0<r<\/strong><1).<\/strong><\/p>\n

\u0110\u00f3 l\u00e0 nh\u1eefng c\u0103n c\u1ee9 b\u01b0\u1edbc \u0111\u1ea7u c\u00f3 th\u1ec3 l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c \u0111\u01a1n gi\u1ea3n ho\u00e1 t\u1ed5 th\u00e0nh x\u00fac ti\u1ebfn t\u00e1i sinh ph\u1ee5c h\u1ed3i r\u1eebng c\u0169ng nh\u01b0 ch\u1ecdn c\u00e2y tr\u1ed3ng h\u1ed7n giao v\u1edbi C\u0103m xe khi tr\u1ed3ng r\u1eebng.<\/p>\n

2.5. Sinh tr\u01b0\u1edfng c\u1ee7a C\u0103m xe.<\/strong><\/em><\/p>\n

K\u1ebft qu\u1ea3 \u0111i\u1ec1u tra C\u0103m xe tr\u1ed3ng th\u1eed nghi\u1ec7m 35 tu\u1ed5i (1964- 1999) ghi \u1edf b\u1ea3ng 5. T\u1eeb k\u1ebft qu\u1ea3 tr\u00ean ta th\u1ea5y r\u1eb1ng:<\/p>\n

B\u1ea3ng<\/strong>5<\/strong><\/p>\n\n\n\n\n\n
Ch\u1ec9h\u00d8 ti\u00eau\u00aau<\/strong><\/p>\n

\u0110\u1ecba\u00dea \u0111i\u1ec3m\u00d3m<\/strong><\/td>\n

\u0110\u1ed9\u00a7\u00e9 caoao<\/strong><\/p>\n

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

Lo\u1ea1i\u00b9i<\/strong><\/p>\n

\u0111\u1ea5t\u00cat<\/strong><\/td>\n

1.3<\/sub><\/strong><\/p>\n

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

D<\/strong>DD<\/strong><\/p>\n

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

vnvn<\/sub><\/strong><\/p>\n

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

D<\/strong>HH<\/strong><\/p>\n

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

(mm3<\/sup>)<\/strong><\/td>\nD<\/strong>VV<\/strong><\/p>\n

(mm3<\/sup>)<\/strong><\/td>\n<\/tr>\n

Eakmatat<\/p>\n

(DakLakak)<\/td>\n

500<\/td>\n\u0110\u1ecf\u00a7\u00e1 bazanan<\/td>\n33.97<\/td>\n0.965<\/td>\n17.46<\/td>\n0.98<\/td>\n0.782<\/td>\n0.022<\/td>\n<\/tr>\n
LangHanhnh<\/p>\n

(L\u00e2m\u00a9m \u0110\u1ed3ngng)<\/td>\n

900<\/td>\n\u0110\u1ecf\u00a7\u00e1 bazanan<\/td>\n26.2<\/td>\n0.74<\/td>\n16.5<\/td>\n0.47<\/td>\n0.444<\/td>\n0.012<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u0103m xe c\u00f3 s\u1ee9c sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i kh\u00e1, \u0111\u1ea1t m\u1ee9c b\u00ecnh qu\u00e2n t\u1eeb 0.74 \u0111\u1ebfn 0.96cm v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 0.47-0.98m v\u1ec1 chi\u1ec1u cao. C\u0103m xe \u1edf Eakmat c\u00f3 l\u01b0\u1ee3ng t\u0103ng tr\u01b0\u1edfng cao h\u01a1n Lang Hanh c\u00f3 th\u1ec3 do \u0111\u1ed9 cao chi ph\u1ed1i; Tuy nhi\u00ean \u1edf c\u1ea3 2 n\u01a1i \u0111\u1ec1u c\u00f3 s\u1ee9c sinh tr\u01b0\u1edfng cao h\u01a1n g\u1ea7n g\u1ea5p \u0111\u00f4i so v\u1edbi C\u0103m xe \u1edf r\u1eebng t\u1ef1 nhi\u00ean (DD1.3<\/sub> =”0.40-” 0.41v\u00e0 DH= 0.40- 0.41 V\u0169 V\u0103n C\u1ea7n,1990). \u0110i\u1ec1u \u0111\u00f3 cho ph\u00e9p kh\u1eb3ng \u0111\u1ecbnh kh\u1ea3 n\u0103ng g\u00e2y tr\u1ed3ng, ph\u00e1t tri\u1ec3n c\u00e2y C\u0103m xe \u1edf c\u00e1c t\u1ec9nh ph\u00eda Nam.<\/p>\n

3.K\u1ebft lu\u1eadn v\u00e0 \u0111\u1ec1 ngh\u1ecb:<\/strong><\/p>\n

T\u1eeb nh\u1eefng k\u1ebft qu\u1ea3 tr\u00ean c\u00f3 th\u1ec3 r\u00fat ra m\u1ed9t s\u1ed1 nh\u1eadn x\u00e9t v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i v\u00e0 kh\u1ea3 n\u0103ng g\u00e2y tr\u1ed3ng c\u00e2y C\u0103m xe nh\u01b0 sau:<\/p>\n

1. L\u00e0 c\u00e2y b\u1ea3n \u0111\u1ecba \u0111a t\u00e1c d\u1ee5ng, g\u1ed7 c\u00f3 gi\u00e1 tr\u1ecb tr\u00ean th\u1ecb tr\u01b0\u1eddng trong n\u01b0\u1edbc v\u00e0 th\u1ebf gi\u1edbi, c\u00f3 kh\u1ea3 n\u0103ng t\u00e1i sinh h\u1ea1t, t\u00e1i sinh ch\u1ed3i g\u1ed1c, ch\u1ed3i r\u1ec5 r\u1ea5t m\u1ea1nh v\u00e0 c\u00f3 ngu\u1ed3n h\u1ea1t gi\u1ed1ng phong ph\u00fa nh\u01b0ng c\u00e2y \u0111\u00e3 b\u1ecb khai th\u00e1c ki\u1ec7t qu\u1ec7.<\/p>\n

2. Ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean kh\u00e1 ph\u1ed5 bi\u1ebfn \u1edf nhi\u1ec1u n\u01a1i thu\u1ed9c nhi\u1ec1u t\u1ec9nh ph\u00eda Nam c\u00f3 gi\u1edbi h\u1ea1n t\u1eeb 12-14 \u0111\u1ed9 v\u0129 B\u1eafc, \u1edf \u0111\u1ed9 cao d\u01b0\u1edbi 600m c\u00f9ng c\u00e1c ki\u1ec3u r\u1eebng l\u00e1 ho\u1eb7c b\u00e1n th\u01b0\u1eddng xanh h\u1ed7n lo\u00e0i hay thu\u1ea7n lo\u00e0i c\u0169ng m\u1ecdc tr\u00ean nhi\u1ec1u lo\u1ea1i \u0111\u1ea5t k\u1ec3 c\u1ea3 tr\u00ean \u0111\u1ea5t \u0111\u00e3 b\u1ecb tho\u00e1i ho\u00e1 .<\/p>\n

3. Trong c\u00e1c qu\u1ea7n th\u1ec3 t\u1ef1 nhi\u00ean th\u01b0\u1eddng c\u00f3 t\u1eeb 3-5 lo\u00e0i c\u00e2y \u01b0u th\u1ebf c\u00f9ng v\u1edbi C\u0103m xe, trong \u0111\u00f3 c\u00f3 3 lo\u00e0i c\u00f3 m\u1ed1i quan h\u1ec7 h\u1ed7 tr\u1ee3 : Gi\u00e1ng h\u01b0\u01a1ng, B\u1eb1ng l\u0103ng v\u00e0 C\u1ea9m li\u00ean l\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn \u0111\u1ec3 t\u00e1i sinh ph\u1ee5c h\u1ed3i ho\u1eb7c g\u00e2y tr\u1ed3ng h\u1ed7n lo\u00e0i v\u1edbi C\u0103m xe.<\/p>\n

4. Sinh tr\u01b0\u1edfng t\u01b0\u01a1ng \u0111\u1ed1i kh\u00e1 c\u1ea3 \u1edf r\u1eebng t\u1ef1 nhi\u00ean v\u00e0 r\u1eebng tr\u1ed3ng v\u1edbi l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng b\u00ecnh qu\u00e2n n\u0103m t\u1eeb 0.4cm v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 0.5m v\u1ec1 chi\u1ec1u cao, c\u00f3 n\u01a1i \u0111\u1ea1t 0,96cm v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh v\u00e0 0,98m v\u1ec1 chi\u1ec1u cao.<\/p>\n

Do v\u1eady, \u0111\u00e2y l\u00e0 lo\u00e0i c\u00e2y c\u00f3 nhi\u1ec1u tri\u1ec3n v\u1ecdng trong vi\u1ec7c t\u00e1i sinh ph\u1ee5c h\u1ed3i v\u00e0 tr\u1ed3ng r\u1eebng \u1edf c\u00e1c t\u1ec9nh Nam Trung B\u1ed9, \u0110\u00f4ng Nam B\u1ed9 v\u00e0 T\u00e2y Nguy\u00ean r\u1ea5t c\u1ea7n \u0111\u01b0\u1ee3c quan t\u00e2m .<\/p>\n

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

1. Nguy\u1ec5n Ho\u00e0ng Ngh\u0129a (2001), Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u trong L\u00e2m nghi\u1ec7p, Nh\u00e0 xu\u1ea5t b\u1ea3n N\u00f4ng nghi\u1ec7p H\u00e0 N\u1ed9i.<\/p>\n

2. Nguy\u1ec5n H\u1ea3i Tu\u1ea5t, Ng\u00f4 Kim Kh\u00f4i (1996), X\u1eed l\u00fd th\u1ed1ng k\u00ea k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u th\u1ef1c nghi\u1ec7m trong N\u00f4ng L\u00e2m nghi\u1ec7p tr\u00ean m\u00e1y vi t\u00ednh (b\u1eb1ng Excel 5.0), Nh\u00e0 xu\u1ea5t b\u1ea3n N\u00f4ng nghi\u1ec7p.<\/p>\n

3. Nguy\u1ec5n H\u1ea3i Tu\u1ea5t (1982), Th\u1ed1ng k\u00ea to\u00e1n h\u1ecdc trong L\u00e2m nghi\u1ec7p, Nh\u00e0 xu\u1ea5t b\u1ea3n N\u00f4ng nghi\u1ec7p.<\/p>\n

Summary<\/strong>: This is a research on natural distribution, soil characteristics, species composition of the population, group of dominant species and growth of Xylia xylocarpa in South Vietnam provinces. Results shows that this is an indigenous, multi-purpose species, highly promising for forest regeneration, rehabilitation and afforestation in the provinces of South Central Vietnam, Eastern South Vietnam and the Central Highlands.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u0103m xe (Xylia xylocarpa Roxb) Taub) còn g\u1ecdi là C\u1ea9m xe thu\u1ed9c h\u1ecd \u0110\u1eadu (Fabaceae), h\u1ecd ph\u1ee5 trinh n\u1eef (Mimosoideae), ngành M\u1ed9c lan (Magnoliophyta), m\u1ecdc t\u1ef1 nhiên \u1edf nhi\u1ec1u n\u01b0\u1edbc Châu á: \u1ea5n \u0110\u1ed9 , Myanma, Thái Lan, Lào, Campuchia và Vi\u1ec7t Nam. C\u0103m xe là loài cây \u0111a tác d\u1ee5ng, thu\u1ed9c nhóm II, g\u1ed7 n\u1eb7ng, c\u1ee9ng, không b\u1ecb m\u1ed1i m\u1ecdt, dùng \u0111óng \u0111\u1ed3 gia d\u1ee5ng, xây d\u1ef1ng, \u0111óng tàu, toa tàu l\u1eeda, bánh xe bò, c\u1ed9t \u0111i\u1ec7n, tr\u1ee5 tiêu… <\/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\/8614"}],"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=8614"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8614\/revisions"}],"predecessor-version":[{"id":19287,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8614\/revisions\/19287"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}