{"id":15117,"date":"2015-05-18T10:10:32","date_gmt":"2015-05-18T03:10:32","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/?p=15117"},"modified":"2015-05-05T10:13:58","modified_gmt":"2015-05-05T03:13:58","slug":"bao-cao-ket-qua-de-tai-nghien-cuu-hoan-thien-cac-bieu-dieu-tra-cua-mot-so-loai-cay-keo-bach-dan-thong","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/bao-cao-ket-qua-de-tai-nghien-cuu-hoan-thien-cac-bieu-dieu-tra-cua-mot-so-loai-cay-keo-bach-dan-thong\/","title":{"rendered":"B\u00e1o c\u00e1o k\u1ebft qu\u1ea3 \u0111\u1ec1 t\u00e0i: Nghi\u00ean c\u1ee9u ho\u00e0n thi\u1ec7n c\u00e1c bi\u1ec3u \u0111i\u1ec1u tra c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y Keo, B\u1ea1ch \u0111\u00e0n, Th\u00f4ng"},"content":{"rendered":"<p style=\"text-align: right;\"><em>\u00a0Phan Minh S\u00e1ng<\/em><\/p>\n<p style=\"text-align: left;\"><em><b><\/b><\/em><b>I. <\/b><b>\u0110\u1eb7t v\u1ea5n \u0111\u1ec1<\/b><\/p>\n<p>Trong nh\u1eefng n\u0103m qua, c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh r\u1eebng nh\u01b0 bi\u1ec3u th\u1ec3 t\u00edch, bi\u1ec3u c\u1ea5p \u0111\u1ea5t, bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng\u2026 \u00a0\u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng cho g\u1ed3m c\u00f3 h\u1ea7u h\u1ebft c\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 y\u1ebfu \u1edf n\u01b0\u1edbc ta v\u00e0 \u0111\u00e3 g\u00f3p ph\u1ea7n quan tr\u1ecdng cho c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd kinh doanh r\u1eebng \u1edf n\u01b0\u1edbc ta.<\/p>\n<p>M\u1eb7c d\u00f9 v\u1eady vi\u1ec7c x\u00e2y d\u1ef1ng b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra cho r\u1eebng tr\u1ed3ng \u1edf n\u01b0\u1edbc ta v\u1eabn c\u00f2n m\u1ed9t s\u1ed1 <b>v\u1ea5n \u0111\u1ec1 n\u00ean \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n <\/b>\u0111\u1ec3 \u0111\u00e1p \u1ee9ng t\u1ed1t h\u01a1n \u0111\u00f2i h\u1ecfi c\u1ee7a nghi\u00ean c\u1ee9u v\u00e0 s\u1ea3n xu\u1ea5t l\u00e2m nghi\u1ec7p, \u0111\u00e2y c\u0169ng l\u00e0 lu\u1eadn gi\u1ea3i cho <b>t\u00ednh c\u1ea7n thi\u1ebft ph\u1ea3i th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i<\/b>:<\/p>\n<p>C\u00e1c k\u1ebft qu\u1ea3 c\u1ee7a m\u1ed9t s\u1ed1 nghi\u00ean c\u1ee9u l\u1eadp b\u1ea3ng bi\u1ec3u v\u1eabn d\u1ef1a tr\u00ean s\u1ed1 li\u1ec7u c\u1ee7a ch\u1ecdn \u00f4 ti\u00eau chu\u1ea9n, c\u00e2y ti\u00eau chu\u1ea9n \u0111\u1ec3 \u0111o \u0111\u1ebfm theo ph\u01b0\u01a1ng ph\u00e1p <i>l\u1ea5y m\u1eabu \u0111i\u1ec3n h\u00ecnh<\/i>, s\u1ed1 li\u1ec7u n\u00e0y kh\u00f4ng ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng trong c\u00e1c ph\u00e2n t\u00edch th\u1ed1ng k\u00ea chu\u1ea9n m\u1ef1c v\u00ec l\u00fd thuy\u1ebft x\u00e1c su\u1ea5t th\u1ed1ng k\u00ea l\u00e0 d\u1ef1a tr\u00ean n\u1ec1n t\u1ea3ng c\u00e1c qui lu\u1eadt v\u1ec1 x\u00e1c su\u1ea5t (laws of chance) m\u00e0 ch\u1ec9 \u0111\u00fang \u0111\u1eafn khi m\u1eabu \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhi\u00ean (Grafen v\u00e0 Hails, 2002; Husch<i> et al.<\/i>, 2003; Jayaraman, 1999). Alder (1980) \u0111\u1ec1 c\u1eadp, hai thi\u1ebft k\u1ebf th\u00ed nghi\u1ec7m ph\u00f9 h\u1ee3p v\u1edbi nghi\u00ean c\u1ee9u sinh tr\u01b0\u1edfng v\u00e0 s\u1ea3n l\u01b0\u1ee3ng bao g\u1ed3m b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m ng\u1eabu nhi\u00ean v\u00e0 r\u00fat m\u1eabu h\u1ec7 th\u1ed1ng (Alder, 1980).<\/p>\n<p>Do kinh ph\u00ed, th\u1eddi gian h\u1ea1n h\u1eb9p k\u1ebft h\u1ee3p v\u1edbi s\u1ed1 l\u01b0\u1ee3ng h\u1ea1n ch\u1ebf c\u00e1c l\u00e2m ph\u1ea7n c\u1ee7a m\u1ed7i lo\u00e0i c\u00e2y\u00a0 nghi\u00ean c\u1ee9u trong th\u1eddi gian tr\u01b0\u1edbc \u0111\u00e2y, n\u00ean m\u1ed9t s\u1ed1 c\u00e1c nghi\u00ean c\u1ee9u l\u1eadp bi\u1ec3u cho r\u1eebng tr\u1ed3ng ch\u1ec9 l\u1ea5y \u0111\u01b0\u1ee3c s\u1ed1 li\u1ec7u tr\u00ean m\u1ed9t s\u1ed1 v\u00f9ng sinh th\u00e1i nh\u1ea5t \u0111\u1ecbnh. S\u1ed1 li\u1ec7u h\u1ea1n ch\u1ebf n\u00e0y, v\u00ec th\u1ebf, kh\u00f4ng bao qu\u00e1t \u0111\u01b0\u1ee3c h\u1ebft \u0111\u1eb7c \u0111i\u1ec3m \u0111a d\u1ea1ng c\u00e1c l\u00e2m ph\u1ea7n r\u1eebng tr\u1ed3ng c\u1ee7a m\u1ed7i lo\u00e0i c\u00e2y tr\u00ean c\u00e1c l\u1eadp \u0111\u1ecba, bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt kinh doanh, qu\u1ea3n l\u00fd kh\u00e1c nhau. Alder (1980) \u0111\u1ec1 ngh\u1ecb \u0111\u1ec3 l\u1eadp bi\u1ec3u c\u1ea5p \u0111\u1ea5t, s\u1ea3n l\u01b0\u1ee3ng cho m\u1ed9t lo\u00e0i c\u00e2y, c\u1ea7n kho\u1ea3ng 100 ti\u00eau chu\u1ea9n (\u0111\u1ecbnh v\u1ecb) b\u1ed1 tr\u00ed tr\u00ean c\u00e1c \u0111i\u1ec1u ki\u1ec7n l\u1eadp \u0111\u1ecba v\u00e0 bi\u1ec7n ph\u00e1p k\u1ef9 thu\u1eadt t\u00e1c \u0111\u1ed9ng kh\u00e1c nhau.<\/p>\n<p>C\u00e1c t\u00e1c gi\u1ea3 th\u01b0\u1eddng c\u1ed1 g\u1eafng t\u00ecm c\u00e1c l\u00e2m ph\u1ea7n ch\u01b0a ho\u1eb7c \u00edt b\u1ecb t\u00e1c \u0111\u1ed9ng \u0111\u1ec3 l\u1eadp \u00f4 ti\u00eau chu\u1ea9n \u0111o \u0111\u1ebfm, \u0111i\u1ec1u n\u00e0y c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 c\u00e1c qui lu\u1eadt c\u1ea5u tr\u00fac v\u00e0 sinh tr\u01b0\u1edfng c\u1ee7a l\u00e2m ph\u1ea7n kh\u00f4ng b\u1ecb x\u00e1o tr\u1ed9n. Tuy nhi\u00ean l\u1ea1i c\u00f3 nh\u01b0\u1ee3c \u0111i\u1ec3m l\u00e0 t\u00ednh \u0111\u1ea1i di\u1ec7n cho th\u1ef1c ti\u1ec5n phong ph\u00fa c\u1ee7a s\u1ea3n xu\u1ea5t kinh doanh kh\u00f4ng cao, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c t\u00e1c \u0111\u1ed9ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1eadt \u0111\u1ed9 l\u00e2m ph\u1ea7n \u2013 nh\u00e2n t\u1ed1 r\u1ea5t quan tr\u1ecdng trong m\u00f4 ph\u1ecfng sinh tr\u01b0\u1edfng v\u00e0 s\u1ea3n l\u01b0\u1ee3ng. Alder (2003) \u0111\u00e3 s\u1eed d\u1ee5ng s\u1ed1 li\u1ec7u \u0111\u1ee7 l\u1edbn c\u00e1c \u00f4 ti\u00eau chu\u1ea9n \u0111\u1ecbnh v\u1ecb v\u00e0 t\u1ea1m th\u1eddi (bao g\u1ed3m c\u00e1c \u00f4 t\u1ea1m th\u1eddi tr\u00ean l\u00e2m ph\u1ea7n \u0111\u00e3 b\u1ecb t\u00e1c \u0111\u1ed9ng) \u0111\u1ec3 x\u00e2y d\u1ef1ng bi\u1ec3u sinh tr\u01b0\u1edfng v\u00e0 s\u1ea3n l\u01b0\u1ee3ng cho B\u1ea1ch \u0111\u00e0n, Th\u00f4ng caribbea v\u00e0 Th\u00f4ng nh\u1ef1a \u1edf Uganda (Alder<i> et al.<\/i>, 2003).<\/p>\n<p>Vi\u1ec7c \u00e1p d\u1ee5ng m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn chung cho m\u1ed9t v\u00e0i v\u1ea5n \u0111\u1ec1\/ kh\u00e2u trong l\u1eadp b\u1ea3ng bi\u1ec3u \u1edf n\u01b0\u1edbc ta v\u00ed d\u1ee5 nh\u01b0: x\u00e1c \u0111\u1ecbnh m\u1eadt \u0111\u1ed9 t\u1ed1i \u01b0u t\u1eeb lu\u1eadn ch\u1ee9ng l\u00e2m ph\u1ea7n chu\u1ea9n v\u1edbi t\u1ed5ng di\u1ec7n t\u00edch t\u00e1n c\u00e1c c\u00e2y\/ ha = 10.000 m<sup>2<\/sup> cho r\u1eebng tr\u1ed3ng c\u00e1c lo\u00e0i c\u00e2y t\u1eeb l\u00e1 kim (th\u00f4ng\u2026) cho \u0111\u1ebfn l\u00e1 r\u1ed9ng (keo, b\u1ea1ch \u0111\u00e0n\u2026) c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m sinh th\u00e1i r\u1ea5t kh\u00e1c nhau, v\u1edbi h\u00ecnh th\u00e1i t\u00e1n v\u00e0 m\u1ea1ng h\u00ecnh s\u1eafp x\u1ebfp kh\u00f4ng gian c\u1ee7a l\u00e1, t\u00e1n l\u00e1 r\u1ea5t \u0111a d\u1ea1ng (v\u00ed d\u1ee5: b\u1ea1ch \u0111\u00e0n so v\u1edbi keo)\u2026 ch\u01b0a ch\u1eafc \u0111\u00e3 l\u00e0 t\u1ed1i \u01b0u so v\u1edbi nh\u1eefng ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c v\u1ec1 x\u00e1c \u0111\u1ecbnh m\u1eadt \u0111\u1ed9 t\u1ed1i \u0111a v\u00e0\/ ho\u1eb7c m\u1eadt \u0111\u1ed9 t\u1ed1i \u01b0u \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u1edf tr\u00ean.<\/p>\n<p>C\u00e1c th\u00ed nghi\u1ec7m \u1edf Vi\u1ec7t Nam cho th\u1ea5y t\u1ec9a th\u01b0a l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y r\u1eebng tr\u1ed3ng qua \u0111\u00f3 c\u00f3 t\u00e1c d\u1ee5ng m\u1ea1nh trong \u0111i\u1ec1u ch\u1ec9nh k\u1ebft c\u1ea5u s\u1ea3n ph\u1ea9m l\u00e2m ph\u1ea7n nh\u01b0 t\u0103ng s\u1ed1 l\u01b0\u1ee3ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng g\u1ed7 x\u1ebb (Phan Minh S\u00e1ng, 2005), trong khi \u0111\u00f3 t\u1ec9a th\u01b0a \u2013 \u0111\u1ebfn m\u1ed9t gi\u1edbi h\u1ea1n nh\u1ea5t \u0111\u1ecbnh kh\u00f4ng l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 sinh tr\u01b0\u1edfng th\u1ec3 t\u00edch c\u1ee7a l\u00e2m ph\u1ea7n (Skovsgaard v\u00e0 Vanclay, 2007; Vanclay, 1999). Tuy nhi\u00ean, h\u1ea7u h\u1ebft c\u00e1c b\u1ea3ng bi\u1ec3u \u0111\u00e3 x\u00e2y d\u1ef1ng \u0111\u01b0\u1ee3c ch\u01b0a ph\u1ea3n \u00e1nh \u0111\u01b0\u1ee3c qui lu\u1eadt sinh tr\u01b0\u1edfng v\u00e0 ph\u00e1t tri\u1ec3n c\u1ee7a l\u00e2m ph\u1ea7n sau t\u1ec9a th\u01b0a t\u1eeb k\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m.<\/p>\n<p>C\u00e1c bi\u1ec3u th\u1ec3 t\u00edch, c\u1ea5p \u0111\u1ea5t, s\u1ea3n l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c l\u1eadp g\u1ea7n \u0111\u00e2y nh\u1ea5t cho r\u1eebng tr\u1ed3ng c\u00e1c lo\u00e0i c\u00e2y n\u00e0y (tr\u1eeb bi\u1ec3u t\u1ea1m th\u1eddi lo\u00e0i Keo lai) c\u0169ng \u0111\u00e3 c\u00e1ch \u0111\u00e2y 8 \u2013 15 n\u0103m (V\u1ee5 KHCN &amp; CLSP &#8211; B\u1ed9 N\u00f4ng nghi\u1ec7p v\u00e0 PTNT, 2003), trong khi \u0111\u00f3 gi\u1ed1ng, k\u1ef9 thu\u1eadt th\u00e2m canh r\u1eebng tr\u1ed3ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n c\u00f9ng v\u1edbi nh\u1eadn th\u1ee9c, kh\u1ea3 n\u0103ng \u0111\u1ea7u t\u01b0 c\u1ee7a c\u00e1c ch\u1ee7 r\u1eebng ng\u00e0y c\u00e0ng l\u1edbn n\u00ean r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c th\u00e2m canh v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 cao, n\u0103ng su\u1ea5t \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 m\u00e0 c\u00e1c b\u1ea3ng bi\u1ec3u \u0111\u00e3 x\u00e2y d\u1ef1ng tr\u01b0\u1edbc \u0111\u00e2y kh\u00f4ng bao qu\u00e1t \u0111\u01b0\u1ee3c. C\u00f9ng v\u1edbi \u0111\u00f3, qu\u00e1 tr\u00ecnh suy gi\u1ea3m \u0111\u1ed9 ph\u00ec, suy gi\u1ea3m n\u0103ng su\u1ea5t c\u1ee7a r\u1eebng tr\u1ed3ng c\u00e1c lu\u00e2n k\u1ef3 k\u1ebf ti\u1ebfp ho\u1eb7c tr\u00ean c\u00e1c l\u1eadp \u0111\u1ecba c\u1ef1c \u0111oan v\u00e0 bi\u1ebfn \u0111\u1ed5i kh\u00ed h\u1eadu l\u00e0m thay \u0111\u1ed5i h\u00ecnh th\u00e1i v\u00e0 c\u00e1c quy lu\u1eadt sinh tr\u01b0\u1edfng, ph\u00e1t tri\u1ec3n c\u1ee7a c\u00e2y v\u00e0 r\u1eebng tr\u1ed3ng m\u00e0 s\u1ef1 thay \u0111\u1ed5i n\u00e0y v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh cho c\u00e1c bi\u1ec3u \u0111\u00e3 x\u00e2y d\u1ef1ng.<\/p>\n<p>T\u1ed1c \u0111\u1ed9 ph\u00e1t tri\u1ec3n m\u1ea1nh m\u1ebd c\u1ee7a c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00e0 c\u00f4ng nghi\u1ec7p ch\u1ebf bi\u1ebfn g\u1ed7 l\u00e0m t\u0103ng cao v\u00e0 \u0111a d\u1ea1ng h\u00f3a nhu c\u1ea7u g\u1ed7 nguy\u00ean li\u1ec7u. V\u00ed d\u1ee5 ri\u00eang \u0111\u1ed1i v\u1edbi m\u1eb7t h\u00e0ng g\u1ed7 x\u1ebb, nhu c\u1ea7u l\u1edbn v\u1ec1 c\u00e1c lo\u1ea1i g\u1ed7 c\u00f3 qui c\u00e1ch v\u00e0 ph\u1ea9m ch\u1ea5t kh\u00e1c nhau nh\u01b0 l\u00e0m \u0111\u1ed3 m\u1ed9c, v\u00e1n x\u00e2y d\u1ef1ng, v\u00e1n bao b\u00ec\u2026 \u0111\u00e3 g\u00f3p ph\u1ea7n t\u1eadn thu v\u00e0 n\u00e2ng cao \u0111\u00e1ng k\u1ec3 gi\u00e1 tr\u1ecb g\u1ed7 c\u1ee7a r\u1eebng tr\u1ed3ng. V\u00ec v\u1eady, s\u1ea3n xu\u1ea5t, kinh doanh l\u00e2m nghi\u1ec7p \u0111ang c\u00f3 <i>nhu c\u1ea7u c\u1ea5p thi\u1ebft v\u1ec1 bi\u1ec3u s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m <\/i>c\u1ee7a c\u00e1c lo\u00e0i c\u00e2y ch\u00ednh cho tr\u1ed3ng r\u1eebng s\u1ea3n xu\u1ea5t, c\u00f3 di\u1ec7n t\u00edch r\u1eebng tr\u1ed3ng l\u1edbn, c\u01b0\u1eddng \u0111\u1ed9 kinh doanh cao, c\u00f3 vai tr\u00f2 thi\u1ebft y\u1ebfu trong cung c\u1ea5p g\u1ed7 nguy\u00ean li\u1ec7u cho s\u1ea3n xu\u1ea5t \u0111\u1ed3 m\u1ed9c, v\u00e1n x\u00e2y d\u1ef1ng, v\u00e1n bao b\u00ec, d\u0103m, gi\u1ea5y\u2026 hi\u1ec7n nay, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c lo\u00e0i Keo tai t\u01b0\u1ee3ng, Keo lai v\u00e0 B\u1ea1ch \u0111\u00e0n urophylla. \u0110\u1ec3 t\u1eeb c\u00e1c b\u1ea3ng bi\u1ec3u n\u00e0y, gi\u00fap ch\u1ee7 r\u1eebng h\u1ea1ch to\u00e1n, l\u1eadp k\u1ebf ho\u1ea1ch s\u1ea3n xu\u1ea5t kinh doanh. Tuy nhi\u00ean c\u00e1c b\u1ea3ng bi\u1ec3u n\u00e0y v\u1eabn ch\u01b0a c\u00f3, \u0111\u1eb7c bi\u1ec7t l\u00e0 ba lo\u00e0i c\u00e2y n\u00eau tr\u00ean.<\/p>\n<p>R\u1eebng tr\u1ed3ng kh\u00f4ng nh\u1eefng cung c\u1ea5p l\u00e2m s\u1ea3n &#8211; ch\u1ee7 y\u1ebfu g\u1ed7 &#8211; m\u00e0 c\u00f2n l\u00e0 m\u1ed9t b\u1ec3 h\u1ea5p th\u1ee5 cacbon h\u1eefu hi\u1ec7u. \u0110\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng c\u00e1cbon h\u1ea5p th\u1ee5 \u0111\u01b0\u1ee3c b\u1edfi r\u1eebng tr\u1ed3ng c\u1ea7n t\u00ednh \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng h\u1ea5p th\u1ee5 qua sinh kh\u1ed1i c\u00e2y v\u00e0 t\u1ed3n tr\u1eef trong \u0111\u1ea5t. M\u1eb7t kh\u00e1c, c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u01b0\u1edbc t\u00ednh n\u0103ng su\u1ea5t sinh kh\u1ed1i t\u1eeb n\u0103ng su\u1ea5t g\u1ed7 c\u1ee7a r\u1eebng tr\u1ed3ng.<\/p>\n<p>Do s\u1ef1 ph\u00e1t tri\u1ec3n v\u00e0 ti\u1ec7n \u00edch c\u1ee7a c\u00e1c khoa h\u1ecdc m\u00e1y t\u00ednh, c\u00e1c b\u1ea3ng bi\u1ec3u \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u00e0 xu\u1ea5t b\u1ea3n tr\u00ean gi\u1ea5y kh\u00f3 s\u1eed d\u1ee5ng, \u00edt t\u00ednh \u1ee9ng d\u1ee5ng n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1ea3i l\u00ean x\u1eed l\u00fd tr\u00ean n\u1ec1n c\u00e1c \u1ee9ng d\u1ee5ng qu\u1ea3n l\u00fd d\u1eef li\u1ec7u \u0111\u01a1n gi\u1ea3n ph\u1ed5 bi\u1ebfn (vd: Visual Basic, MS Excel, MS Access, Open Office); Ngo\u00e0i ra, ch\u1ee7 r\u1eebng r\u1ea5t c\u1ea7n c\u00e1c ph\u1ea7n m\u1ec1m c\u00f3 kh\u1ea3 n\u0103ng x\u00e2y d\u1ef1ng nhanh bi\u1ec3u th\u01b0\u01a1ng ph\u1ea9m, bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng \u0111\u1ec3 s\u1eed d\u1ee5ng khi c\u00f3 thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t c\u1ee7a nhu c\u1ea7u th\u1ecb tr\u01b0\u1eddng, \u0111i\u1ec1u ki\u1ec7n s\u1ea3n xu\u1ea5t, m\u1ee5c \u0111\u00edch kinh doanh r\u1eebng trong khi nh\u1eefng bi\u1ec3u s\u1eb5n c\u00f3 ch\u01b0a bao h\u00e0m \u0111\u01b0\u1ee3c.<\/p>\n<p><b>\u00a0<\/b><b>II. <\/b><b>N\u1ed9i dung v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/b><\/p>\n<p><b>2.1 N\u1ed9i dung nghi\u00ean c\u1ee9u<\/b><\/p>\n<p><b><i>2.1.1. Ki\u1ec3m tra, hi\u1ec7u ch\u1ec9nh v\u00e0 b\u1ed5 sung c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh \u0111\u00e3 c\u00f3 cho 9 lo\u00e0i c\u00e2y Keo l\u00e1 tr\u00e0m, Keo tai t\u01b0\u1ee3ng, Keo lai, B\u1ea1ch \u0111\u00e0n urophylla, B\u1ea1ch \u0111\u00e0n Camal, Th\u00f4ng ba l\u00e1, Th\u00f4ng m\u00e3 v\u0129 , Th\u00f4ng caribbea v\u00e0 Th\u00f4ng nh\u1ef1a<\/i><\/b><\/p>\n<p><i>a) Ki\u1ec3m tra c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh \u0111\u00e3 c\u00f3 cho 9 lo\u00e0i c\u00e2y<\/i><\/p>\n<ul>\n<li>Ki\u1ec3m tra bi\u1ec3u th\u1ec3 t\u00edch, bi\u1ec3u s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m (n\u1ebfu c\u00f3):<\/li>\n<li>Ki\u1ec3m nghi\u1ec7m bi\u1ec3u c\u1ea5p \u0111\u1ea5t:<\/li>\n<li>Ki\u1ec3m tra c\u00e1c m\u00f4 h\u00ecnh s\u1ea3n l\u01b0\u1ee3ng kh\u00e1c<\/li>\n<\/ul>\n<p><i>b). Hi\u1ec7u ch\u1ec9nh, b\u1ed5 sung c\u00e1c bi\u1ec3u th\u1ec3 t\u00edch, bi\u1ec3u c\u1ea5p \u0111\u1ea5t cho 04 lo\u00e0i Keo l\u00e1 tr\u00e0m, B\u1ea1ch \u0111\u00e0n Camal, Th\u00f4ng m\u00e3 v\u0129 v\u00e0 Th\u00f4ng caribbea<\/i><\/p>\n<p><b><i>2.1.2. X\u00e2y d\u1ef1ng l\u1ea1i bi\u1ec3u th\u1ec3 t\u00edch, c\u1ea5p \u0111\u1ea5t v\u00e0 s\u1ea3n l\u01b0\u1ee3ng 03 lo\u00e0i Keo tai t\u01b0\u1ee3ng, B\u1ea1ch \u0111\u00e0n Urophylla v\u00e0 Keo lai v\u00e0 x\u00e2y d\u1ef1ng bi\u1ec3u s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m, kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m, v\u00e0 b\u1ed9 ph\u1eadn s\u1ea3n ph\u1ea9m kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m v\u00e0 cacbon trong bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng cho 07 lo\u00e0i c\u00e2y Keo l\u00e1 tr\u00e0m, Keo tai t\u01b0\u1ee3ng, Keo lai, B\u1ea1ch \u0111\u00e0n urophylla, B\u1ea1ch \u0111\u00e0n Camal, Th\u00f4ng m\u00e3 v\u0129 , Th\u00f4ng caribbea <\/i><\/b><\/p>\n<p>N\u1ebfu k\u1ebft qu\u1ea3 ki\u1ec3m tra c\u00f3 sai s\u1ed1 qu\u00e1 cao, bi\u1ec3u kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c th\u00ec s\u1ebd ti\u1ebfn h\u00e0nh l\u1eadp l\u1ea1i bi\u1ec3u. Qui tr\u00ecnh l\u1eadp l\u1ea1i bi\u1ec3u l\u00e0 qui tr\u00ecnh \u0111\u00e3 \u0111\u01b0\u1ee3c chu\u1ea9n h\u00f3a trong c\u00e1c gi\u00e1o tr\u00ecnh s\u1ea3n l\u01b0\u1ee3ng r\u1eebng v\u00e0 g\u1ed3m c\u00e1c b\u01b0\u1edbc:<\/p>\n<p><i>a) X\u00e2y d\u1ef1ng l\u1ea1i bi\u1ec3u th\u1ec3 t\u00edch, c\u1ea5p \u0111\u1ea5t v\u00e0 s\u1ea3n l\u01b0\u1ee3ng 03 lo\u00e0i Keo tai t\u01b0\u1ee3ng, B\u1ea1ch \u0111\u00e0n Urophylla v\u00e0 Keo lai<\/i><\/p>\n<ul>\n<li>L\u1eadp bi\u1ec3u th\u1ec3 t\u00edch hai nh\u00e2n t\u1ed1<\/li>\n<li>L\u1eadp bi\u1ec3u c\u1ea5p \u0111\u1ea5t<\/li>\n<li>X\u00e2y d\u1ef1ng c\u00e1c m\u00f4 h\u00ecnh sinh tr\u01b0\u1edfng, l\u1eadp bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng<\/li>\n<\/ul>\n<p><i>b) X\u00e2y d\u1ef1ng bi\u1ec3u s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m, kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m, v\u00e0 b\u1ed9 ph\u1eadn s\u1ea3n ph\u1ea9m kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m v\u00e0 cacbon trong bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng cho 07 lo\u00e0i c\u00e2y Keo l\u00e1 tr\u00e0m, Keo tai t\u01b0\u1ee3ng, Keo lai, B\u1ea1ch \u0111\u00e0n urophylla, B\u1ea1ch \u0111\u00e0n Camal, Th\u00f4ng m\u00e3 v\u0129 , Th\u00f4ng caribbea <\/i><\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng ph\u01b0\u01a1ng tr\u00ecnh v\u00e0 l\u1eadp bi\u1ec3u \u0111\u1ed9 thon, c\u1ea5p chi\u1ec1u cao, bi\u1ec3u s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m, kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m cho c\u00e1c lo\u00e0i Keo tai t\u01b0\u1ee3ng, Keo lai v\u00e0 B\u1ea1ch \u0111\u00e0n urophylla<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 K\u1ebf th\u1eeba, ki\u1ec3m tra, hi\u1ec7u ch\u1ec9nh \u0111\u1ec3 \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng bi\u1ec3u s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m, kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m c\u1ee7a lo\u00e0i Th\u00f4ng Caribbea \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1eadp tr\u00ean th\u1ebf gi\u1edbi cho Vi\u1ec7t Nam.<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ki\u1ec3m tra, hi\u1ec7u ch\u1ec9nh \u0111\u1ec3 s\u1eed d\u1ee5ng bi\u1ec3u th\u01b0\u01a1ng ph\u1ea9m c\u00e1c lo\u00e0i Th\u00f4ng ba l\u00e1 v\u00e0 Th\u00f4ng m\u00e3 v\u0129<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 K\u1ebf th\u1eeba k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u sinh kh\u1ed1i, c\u00e1cbon c\u00e1c \u0111\u1ec1 t\u00e0i kh\u00e1c trong n\u01b0\u1edbc \u0111\u1ec3 l\u1eadp b\u1ed9 ph\u1eadn sinh kh\u1ed1i, c\u00e1cbon trong bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng c\u00e1c lo\u00e0i c\u00e2y<\/p>\n<p><b><i>2.1.3. X\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m qu\u1ea3n l\u00fd, tra c\u1ee9u c\u01a1 s\u1edf d\u1eef li\u1ec7u, t\u00ednh to\u00e1n tr\u1eef l\u01b0\u1ee3ng v\u00e0 qu\u1ea3n l\u00fd r\u1eebng v\u00e0 h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng<\/i><\/b><\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Qu\u1ea3n l\u00fd, tra c\u1ee9u th\u1ec3 t\u00edch, th\u1ec3 t\u00edch s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m, kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m s\u1ea3n ph\u1ea9m c\u00e2y c\u00e1 l\u1ebb<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Qu\u1ea3n l\u00fd, tra c\u1ee9u tr\u1eef l\u01b0\u1ee3ng, tr\u1eef l\u01b0\u1ee3ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng th\u01b0\u01a1ng ph\u1ea9m s\u1ea3n ph\u1ea9m cho r\u1eebng tr\u1ed3ng c\u00e1c c\u1ea5p \u0111\u1ea5t<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Qu\u1ea3n l\u00fd, tra c\u1ee9u c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra r\u1eebng t\u1ef1 nhi\u00ean \u0111\u00e3 c\u00f3<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng h\u01b0\u1edbng d\u1eabn ph\u1ea7n m\u1ec1m<b><\/b><\/p>\n<p>&nbsp;<\/p>\n<p><b>2.2. Ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u, k\u1ef9 thu\u1eadt s\u1eed d\u1ee5ng<\/b><\/p>\n<p><b><i>2.2.1. Ph\u01b0\u01a1ng ph\u00e1p thu th\u1eadp s\u1ed1 li\u1ec7u<\/i><\/b><\/p>\n<p><i>a) Ph\u01b0\u01a1ng ph\u00e1p ch\u1ecdn l\u00e2m ph\u1ea7n, \u00f4 ti\u00eau chu\u1ea9n t\u1ea1m th\u1eddi v\u00e0 c\u00e2y gi\u1ea3i t\u00edha.<\/i><\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <i>Ch\u1ecdn l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra:<\/i>\u00a0Trong m\u1ed9t \u0111\u01a1n v\u1ecb qu\u1ea3n l\u00fd r\u1eebng (x\u00e3, l\u00e2m tr\u01b0\u1eddng) c\u00e1c l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra \u0111\u01b0\u1ee3c ch\u1ecdn ng\u1eabu nhi\u00ean theo t\u1eebng c\u1ea5p tu\u1ed5i. \u0110\u1ed1i v\u1edbi nh\u1eefng lo\u00e0i m\u00e0 kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecdn ng\u1eabu nhi\u00ean l\u00e2m ph\u1ea7n theo c\u1ea5p tu\u1ed5i tr\u00ean \u0111\u01a1n v\u1ecb qu\u1ea3n l\u00fd r\u1eebng do s\u1ed1 l\u00e2m ph\u1ea7n qu\u00e1 \u00edt th\u00ec c\u00f3 th\u1ec3 \u0111i\u1ec1u tra l\u00e2m ph\u1ea7n \u0111ang c\u00f3.<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <i>Ch\u1ecdn \u00f4 \u0111o \u0111\u1ebfm tr\u00ean l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra:<\/i>\u00a0Tr\u00ean m\u1ed7i l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra, ch\u1ecdn ng\u1eabu nhi\u00ean 03 \u00f4 ti\u00eau chu\u1ea9n t\u1ea1m th\u1eddi, thi\u1ebft l\u1eadp v\u00e0 \u0111o \u0111\u1ebfm.<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <i>Ch\u1ecdn c\u00e2y gi\u1ea3i t\u00edch:<\/i>\u00a01) T\u1eeb s\u1ed1 li\u1ec7u \u0111i\u1ec1u tra 03 \u00f4 ti\u00eau chu\u1ea9n l\u00e2m ph\u1ea7n, t\u00ednh c\u00e2y b\u00ecnh qu\u00e2n theo ba c\u1ea5p k\u00ednh c\u1ee7a l\u00e2m ph\u1ea7n; 2) Li\u1ec7t k\u00ea v\u00e0 \u0111\u00e1nh s\u1ed1 t\u1ea5t c\u1ea3 nh\u1eefng c\u00e2y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh n\u1eb1m trong ph\u1ea1m vi \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a c\u00e2y b\u00ecnh qu\u00e2n theo m\u1ed7i c\u1ea5p k\u00ednh; 3) Ch\u1ecdn ng\u1eabu nhi\u00ean ba c\u00e2y trong 03 nh\u00f3m n\u00e0y. 4) Ch\u1eb7t ng\u1ea3 v\u00e0 gi\u1ea3i t\u00edch theo qui tr\u00ecnh \u0111\u01b0\u1ee3c n\u00eau \u1edf ph\u1ea7n d\u01b0\u1edbi<\/p>\n<p>&nbsp;<\/p>\n<p><i>b). \u0110o \u0111\u1ebfm, gi\u1ea3i t\u00edch c\u00e2y tr\u00ean \u00f4 ti\u00eau chu\u1ea9n<\/i><\/p>\n<p>L\u1eadp \u00f4, \u0111o \u0111\u1ebfm v\u00e0 gi\u1ea3i t\u00edch c\u00e2y ti\u00eau chu\u1ea9n theo ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec1u tra r\u1eebng tr\u1ed3ng chu\u1ea9n m\u1ef1c tr\u00ean th\u1ebf gi\u1edbi c\u0169ng nh\u01b0 Vi\u1ec7t Nam<\/p>\n<p><b><i>2.2.2. Ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd s\u1ed1 li\u1ec7u<\/i><\/b><\/p>\n<p>a). Ch\u1ec9nh l\u00fd v\u00e0 t\u00ednh to\u00e1n c\u00e1c ch\u1ec9 ti\u00eau c\u01a1 b\u1ea3n c\u1ee7a c\u00e2y v\u00e0 l\u00e2m ph\u1ea7n (V, dg, hg, Ho, N, M, G\u2026)<\/p>\n<p><i>b). Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra, l\u1ef1a ch\u1ecdn m\u00f4 h\u00ecnh t\u01b0\u01a1ng quan, h\u00e0m sinh tr\u01b0\u1edfng<\/i><\/p>\n<p>\u0110\u1ec3 l\u1ef1a ch\u1ecdn m\u00f4 h\u00ecnh t\u01b0\u01a1ng quan, h\u00e0m sinh tr\u01b0\u1edfng c\u00e1c b\u01b0\u1edbc c\u01a1 b\u1ea3n \u2013 \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1ea3n l\u01b0\u1ee3c t\u1eeb Vanclay (1997) &#8211; c\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n:<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 So s\u00e1nh c\u00e1c tr\u1ecb s\u1ed1 th\u1ed1ng k\u00ea c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh (h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan R, h\u1ec7 s\u1ed1 t\u01b0\u01a1ng quan \u0111i\u1ec1u ch\u1ec9nh)<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 So s\u00e1nh sai s\u1ed1 m\u00f4 h\u00ecnh (gi\u00e1 tr\u1ecb l\u00fd thuy\u1ebft so v\u1edbi gi\u00e1 tr\u1ecb th\u1ef1c nghi\u1ec7m), ki\u1ec3m tra sai s\u1ed1 h\u1ec7 th\u1ed1ng<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Th\u1eed nghi\u1ec7m b\u1eb1ng s\u1ed1 li\u1ec7u th\u1ef1c nghi\u1ec7m (\u0111\u00e3 \u0111\u01b0\u1ee3c l\u1ea5y ra ng\u1eabu nhi\u00ean tr\u01b0\u1edbc \u0111\u00f3) kh\u00f4ng tham gia x\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Xem x\u00e9t \u0111\u1eb7c \u0111i\u1ec3m sai s\u1ed1 &#8211; ph\u1ea7n d\u01b0 (residuals) c\u1ee7a m\u00f4 h\u00ecnh g\u1ed3m: a) Ph\u00e2n b\u1ed1 t\u1ef1 nhi\u00ean c\u1ee7a sai s\u1ed1, b) ph\u00e2n b\u1ed1 t\u1ea7n su\u1ea5t c\u1ee7a sai s\u1ed1, c) ph\u00e2n b\u1ed1 ph\u1ea7n d\u01b0 theo gi\u00e1 tr\u1ecb l\u00fd thuy\u1ebft c\u1ee7a m\u00f4 h\u00ecnh v\u00e0 d) xem x\u00e9t ph\u00e2n b\u1ed1 c\u1ee7a gi\u00e1 tr\u1ecb l\u00fd thuy\u1ebft v\u00e0 gi\u00e1 tr\u1ecb m\u00f4 h\u00ecnh.<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n th\u1ed1ng k\u00ea hi\u1ec7n \u0111\u1ea1i \u0111\u1ec3 so s\u00e1nh, ch\u1ecdn m\u00f4 h\u00ecnh: S\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n th\u00f4ng tin Akaike \u0111\u1ec3 ch\u1ecdn m\u00f4 h\u00ecnh (Johnson v\u00e0 Omland, 2004):<\/p>\n<p>&nbsp;<\/p>\n<p>AIC = n*Log10(RSS\/n) + 2*k<\/p>\n<p>Trong \u0111\u00f3 RSS l\u00e0 t\u1ed5ng b\u00ecnh ph\u01b0\u01a1ng ph\u1ea7n d\u01b0 (sai s\u1ed1); n: dung l\u01b0\u1ee3ng m\u1eabu (s\u1ed1 quan s\u00e1t); k l\u00e0 t\u1ed5ng s\u1ed1 tham s\u1ed1 c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh, bao g\u1ed3m tham s\u1ed1 t\u1ef1 do v\u00e0 sai s\u1ed1 \u03c3<sup>2<\/sup>.<\/p>\n<p>N\u1ebfu AIC c\u00e0ng nh\u1ecf, ph\u01b0\u01a1ng tr\u00ecnh c\u00e0ng ph\u00f9 h\u1ee3p v\u1edbi s\u1ed1 li\u1ec7u th\u1ef1c nghi\u1ec7m.<\/p>\n<p>\u0110\u1ed1i v\u1edbi h\u00e0m sinh tr\u01b0\u1edfng c\u00f2n ph\u1ea3i ki\u1ec3m tra t\u00ednh ph\u00f9 h\u1ee3p c\u1ee7a n\u00f3 v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m sinh tr\u01b0\u1edfng c\u1ee7a l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra hay kh\u00f4ng b\u1eb1ng \u0111i\u1ec3m u\u1ed1n, gi\u00e1 tr\u1ecb c\u1ef1c \u0111\u1ea1i c\u1ee7a \u0111\u1ea1i l\u01b0\u1ee3ng sinh tr\u01b0\u1edfng.<\/p>\n<p>&nbsp;<\/p>\n<p><i>c). Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra bi\u1ec3u<\/i><\/p>\n<p>K\u1ebft qu\u1ea3 ki\u1ec3m tra bi\u1ec3u c\u00f3 th\u1ec3 l\u00e0m n\u1ea3y sinh:<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00e1c bi\u1ec3u ph\u00f9 h\u1ee3p v\u00e0 v\u1eabn ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00e1c bi\u1ec3u c\u1ea7n ph\u1ea3i hi\u1ec7u ch\u1ec9nh &#8211; v\u00ed d\u1ee5: bi\u1ec3u th\u1ec3 t\u00edch c\u1ea7n l\u1eadp b\u1ed5 sung th\u00eam c\u1ea5p chi\u1ec1u cao m\u1edbi (do m\u1ed9t b\u1ed9 ph\u1eadn c\u1ee7a c\u00e2y c\u00f3 h\u00ecnh th\u00e1i kh\u00e1c v\u1edbi c\u00e1c c\u00e2y tham gia l\u1eadp bi\u1ec3u \u0111ang c\u00f3), bi\u1ec3u c\u1ea5p \u0111\u1ea5t kh\u00f4ng c\u00f3 c\u1ea5p n\u0103ng su\u1ea5t cao ho\u1eb7c r\u1ea5t th\u1ea5p, m\u1ed9t m\u00f4 h\u00ecnh n\u00e0o \u0111\u00f3 trong bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng nh\u01b0 m\u00f4 h\u00ecnh m\u1eadt \u0111\u1ed9, kh\u00f4ng ph\u00f9 h\u1ee3p v\u00e0 c\u1ea7n x\u00e2y d\u1ef1ng l\u1ea1i.<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 C\u00e1c bi\u1ec3u c\u1ea7n ph\u1ea3i x\u00e2y d\u1ef1ng l\u1ea1i: sai s\u1ed1 c\u1ee7a bi\u1ec3u \u0111ang c\u00f3 qu\u00e1 l\u1edbn v\u00e0 kh\u00f4ng th\u1ec3 hi\u1ec7u ch\u1ec9nh \u0111\u01b0\u1ee3c.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra bi\u1ec3u c\u1ee5 th\u1ec3<\/p>\n<p><i>* Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra bi\u1ec3u th\u1ec3 t\u00edch<\/i><\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 S\u1eed d\u1ee5ng s\u1ed1 li\u1ec7u \u0111o \u0111\u01b0\u1eddng k\u00ednh c\u00f3 v\u1ecf v\u00e0 kh\u00f4ng v\u1ecf \u1edf c\u00e1c v\u1ecb tr\u00ed 1\/10 chi\u1ec1u cao c\u00e2y \u0111\u1ec3 t\u00ednh th\u1ec3 t\u00edch c\u00e2y ki\u1ec3m tra b\u1eb1ng c\u00f4ng th\u1ee9c k\u00e9p (V\u0169 Ti\u1ebfn Hinh v\u00e0 Ph\u1ea1m Ng\u1ecdc Giao, 1997)<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Tra bi\u1ec3u th\u1ec3 t\u00edch hai nh\u00e2n t\u1ed1 ho\u1eb7c \u00e1p d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh th\u1ec3 t\u00edch \u0111\u00e3 d\u00f9ng \u0111\u1ec3 x\u00e2y d\u1ef1ng bi\u1ec3u th\u1ec3 t\u00edch<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 T\u00ednh sai s\u1ed1 t\u01b0\u01a1ng \u0111\u1ed1i trung b\u00ecnh gi\u1eefa gi\u00e1 tr\u1ecb tra bi\u1ec3u (t\u00ednh theo ph\u01b0\u01a1ng tr\u00ecnh) v\u00e0 gi\u00e1 tr\u1ecb th\u1ef1c nghi\u1ec7m<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Xem x\u00e9t \u0111\u1eb7c \u0111i\u1ec3m sai s\u1ed1 &#8211; ph\u1ea7n d\u01b0 (residuals)\u00a0 (xem \u1edf tr\u00ean)<\/p>\n<p>&nbsp;<\/p>\n<p><i>* Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra bi\u1ec3u c\u1ea5p \u0111\u1ea5t<\/i><\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ki\u1ec3m tra theo ph\u01b0\u01a1ng ph\u00e1p bi\u1ec3u \u0111\u1ed3: V\u1ebd \u0111\u01b0\u1eddng cong l\u00fd thuy\u1ebft c\u1ea5p \u0111\u1ea5t v\u00e0 \u0111\u01b0\u1eddng cong sinh tr\u01b0\u1edfng chi\u1ec1u cao th\u1ef1c nghi\u1ec7m, so s\u00e1nh, \u0111\u00e1nh gi\u00e1.<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ki\u1ec3m tra b\u1eb1ng so s\u00e1nh tham s\u1ed1 bi\u1ec3u th\u1ecb nh\u1ecbp \u0111i\u1ec7u sinh tr\u01b0\u1edfng c\u1ee7a hai ph\u01b0\u01a1ng tr\u00ecnh, \u0111\u01b0\u1eddng cong c\u1ea5p \u0111\u1ea5t v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh m\u00f4 ph\u1ecfng sinh tr\u01b0\u1edfng chi\u1ec1u cao l\u00e2m ph\u1ea7n ki\u1ec3m tra.<\/p>\n<p>&nbsp;<\/p>\n<p><i>* Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra c\u00e1c m\u00f4 h\u00ecnh s\u1ea3n l\u01b0\u1ee3ng<\/i><\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 So s\u00e1nh gi\u00e1 tr\u1ecb l\u00fd thuy\u1ebft v\u1edbi gi\u00e1 tr\u1ecb th\u1ef1c nghi\u1ec7m c\u1ee7a c\u00e1c bi\u1ebfn s\u1ea3n l\u01b0\u1ee3ng (N, S<sub>T<\/sub>, sinh tr\u01b0\u1edfng d, h, h<sub>0<\/sub>\u2026), t\u00ednh sai s\u1ed1 c\u1ee7a m\u00f4 h\u00ecnh.<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 T\u00ednh ph\u1ea7n d\u01b0 (residual) c\u1ee7a sai s\u1ed1, v\u1ebd l\u00ean bi\u1ec3u \u0111\u1ed3 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 xem c\u00f3 sai s\u1ed1 h\u1ec7 th\u1ed1ng c\u0169ng nh\u01b0 ph\u00e2n b\u1ed1 sai s\u1ed1 c\u00f3 tu\u00e2n theo lu\u1eadt chu\u1ea9n hay kh\u00f4ng (xem \u1edf tr\u00ean)<\/p>\n<p>&nbsp;<\/p>\n<p><i>* Ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7u ch\u1ec9nh bi\u1ec3u<\/i><\/p>\n<p>N\u1ebfu k\u1ebft qu\u1ea3 ki\u1ec3m tra cho th\u1ea5y ph\u01b0\u01a1ng tr\u00ecnh th\u1ec3 t\u00edch, s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m v\u00e0 m\u00f4 h\u00ecnh s\u1ea3n l\u01b0\u1ee3ng n\u00e0o kh\u00f4ng ph\u00f9 h\u1ee3p nh\u01b0ng c\u00f3 th\u1ec3, th\u00ec ph\u1ea3i ti\u1ebfn h\u00e0nh x\u00e2y d\u1ef1ng l\u1ea1i ph\u01b0\u01a1ng tr\u00ecnh\/ m\u00f4 h\u00ecnh \u0111\u00f3, t\u1eeb \u0111\u00f3 \u0111i\u1ec1u ch\u1ec9nh bi\u1ec3u t\u01b0\u01a1ng \u1ee9ng. Ri\u00eang \u0111\u1ed1i v\u1edbi c\u1ea5p \u0111\u1ea5t, trong tr\u01b0\u1eddng h\u1ee3p ki\u1ec3m tra th\u1ea5y c\u1ea5p \u0111\u1ea5t \u0111\u00e3 l\u1eadp ph\u00f9 h\u1ee3p v\u1edbi \u0111a s\u1ed1 c\u1ea5p \u0111\u1ea5t \u0111\u00e3 c\u00f3, ch\u1ec9 thi\u1ebfu c\u00e1c \u0111\u01b0\u1eddng cong sinh tr\u01b0\u1edfng \u0111\u1ea1i di\u1ec7n cho c\u1ea5p \u0111\u1ea5t t\u1ed1t ho\u1eb7c r\u1ea5t x\u1ea5u th\u00ec ch\u1ec9 c\u1ea7n suy di\u1ec5n \u0111\u01b0\u1eddng cong c\u1ea5p \u0111\u1ea5t m\u1edbi t\u1eeb ph\u01b0\u01a1ng tr\u00ecnh sinh tr\u01b0\u1edfng chi\u1ec1u cao \u0111\u00e3 c\u00f3.<\/p>\n<p>&nbsp;<\/p>\n<p><i>* Ph\u01b0\u01a1ng ph\u00e1p x\u00e2y d\u1ef1ng l\u1ea1i ho\u1eb7c l\u00e0m m\u1edbi c\u00e1c bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh<\/i><\/p>\n<p>Ki\u1ec3m tra t\u00ednh \u0111\u1ed3ng nh\u1ea5t v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 ki\u1ec3u sinh tr\u01b0\u1edfng<\/p>\n<p>\u0110\u1ec3 s\u1eed d\u1ee5ng chung s\u1ed1 li\u1ec7u l\u1eadp bi\u1ec3u, c\u1ea7n thi\u1ebft ph\u1ea3i ki\u1ec3m tra t\u00ednh \u0111\u1ed3ng nh\u1ea5t v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 ki\u1ec3u sinh tr\u01b0\u1edfng gi\u1eefa c\u00e1c v\u00f9ng sinh th\u00e1i, gi\u1eefa c\u00e1c c\u1ea5p tu\u1ed5i, v\u00e0 gi\u1eefa c\u00e1c d\u00f2ng gi\u1ed1ng kh\u00e1c nhau, \u0111\u1eb7c bi\u1ec7t l\u00e0 2 lo\u00e0i Keo lai v\u00e0 B\u1ea1ch \u0111\u00e0n urophylla \u2013 l\u00e0 nh\u1eefng lo\u00e0i c\u00f3 m\u1ee9c \u0111a d\u1ea1ng v\u1ec1 gi\u1ed1ng l\u1edbn v\u1edbi nhi\u1ec1u d\u00f2ng kh\u00e1c nhau, nh\u00e2n gi\u1ed1ng theo ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau. Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra g\u1ed3m:<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ki\u1ec3m tra t\u00ednh \u0111\u1ed3ng nh\u1ea5t v\u1ec1 ki\u1ec3u sinh tr\u01b0\u1edfng (chi\u1ec1u cao) b\u1eb1ng: 1) v\u1ebd \u0111\u01b0\u1eddng cong chi\u1ec1u cao trung b\u00ecnh c\u00e1c c\u1ea5p \u0111\u1ea5t s\u01a1 b\u1ed9 l\u00ean bi\u1ec3u \u0111\u1ed3 &#8211; so s\u00e1nh b\u1eb1ng m\u1eaft th\u01b0\u1eddng 2) m\u00f4 ph\u1ecfng c\u00e1c \u0111\u01b0\u1eddng cong sinh tr\u01b0\u1edfng th\u1ef1c nghi\u1ec7m b\u1eb1ng chung m\u1ed9t h\u00e0m s\u1ed1; 3) so s\u00e1nh h\u1ec7 s\u1ed1 g\u00f3c c\u1ee7a ph\u01b0\u01a1ng tr\u00ecnh sinh tr\u01b0\u1edfng<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ki\u1ec3m nghi\u1ec7m s\u1ef1 \u0111\u1ed3ng nh\u1ea5t v\u1ec1 ki\u1ec3u h\u00ecnh:<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ki\u1ec3m nghi\u1ec7m \u0111\u1ed3ng nh\u1ea5t v\u1ec1 ki\u1ec3u h\u00ecnh gi\u1eefa c\u00e1c c\u1ea5p tu\u1ed5i: chia c\u1ea5p tu\u1ed5i cho m\u1ed7i lo\u00e0i, t\u1eeb k\u1ebft qu\u1ea3 gi\u1ea3i t\u00edch x\u00e2y d\u1ef1ng ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng sinh, t\u00ednh h\u1ec7 s\u1ed1 thon qua t\u00edch ph\u00e2n ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng sinh, so s\u00e1nh gi\u1eefa c\u00e1c c\u1ea5p tu\u1ed5i xem g\u1ed9p \u0111\u01b0\u1ee3c kh\u00f4ng.<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ki\u1ec3m nghi\u1ec7m \u0111\u1ed3ng nh\u1ea5t v\u1ec1 ki\u1ec3u h\u00ecnh gi\u1eefa c\u00e1c d\u00f2ng\/gi\u1ed1ng trong m\u1ed9t lo\u00e0i. Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m nghi\u1ec7m c\u0169ng t\u01b0\u01a1ng t\u1ef1 tr\u00ean.<\/p>\n<p>&nbsp;<\/p>\n<p>X\u00e2y d\u1ef1ng c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh:<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng bi\u1ec3u th\u1ec3 t\u00edch v\u00e0 bi\u1ec3u s\u1ea3n ph\u1ea9m, th\u01b0\u01a1ng ph\u1ea9m: th\u1eed nghi\u1ec7m c\u1ea3 hai ph\u01b0\u01a1ng ph\u00e1p<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01b0\u1eddng sinh th\u00e2n c\u00e2y (ph\u01b0\u01a1ng ph\u00e1p tu\u00e2n theo ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e3 gi\u1edbi thi\u1ec7u b\u1edfi \u0110\u1ed3ng S\u0129 Hi\u1ec1n (1974) v\u00e0 V\u0169 Ti\u1ebfn Hinh v\u00e0 Ph\u1ea1m Ng\u1ecdc Giao (1997))<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng ph\u01b0\u01a1ng tr\u00ecnh quan h\u1ec7 gi\u1eefa th\u1ec3 t\u00edch, th\u1ec3 t\u00edch,\u00a0 s\u1ea3n ph\u1ea9m v\u1edbi c\u00e1c nh\u00e2n t\u1ed1 \u0111i\u1ec1u tra c\u00e2y c\u00e1 l\u1ebb nh\u01b0 \u0111\u01b0\u1eddng k\u00ednh, chi\u1ec1u cao, tu\u1ed5i\u2026<\/p>\n<p>L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi \u0111\u1ed1i t\u01b0\u1ee3ng nghi\u00ean c\u1ee9u c\u1ee5 th\u1ec3.<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng c\u00e1c bi\u1ec3u \u0111i\u1ec1u tra kh\u00e1c nh\u01b0 bi\u1ec3u \u0111\u1ed9 thon, bi\u1ec3u c\u1ea5p chi\u1ec1u cao, bi\u1ec3u tr\u1ecdng l\u01b0\u1ee3ng<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng bi\u1ec3u c\u1ea5p \u0111\u1ea5t v\u00e0 s\u1ea3n l\u01b0\u1ee3ng.<\/p>\n<p>&nbsp;<\/p>\n<p><i>* Ph\u01b0\u01a1ng ph\u00e1p x\u00e2y d\u1ef1ng ph\u1ea7n m\u1ec1m qu\u1ea3n l\u00fd, x\u1eed l\u00fd d\u1eef li\u1ec7u v\u00e0 h\u01b0\u1edbng d\u1eabn ph\u1ea7n m\u1ec1m<\/i><\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Ph\u1ea7n m\u1ec1m d\u1ef1 ki\u1ebfn \u0111\u01b0\u1ee3c vi\u1ebft tr\u00ean ng\u00f4n ng\u1eef C#. M\u1ed9t s\u1ed1 \u0111\u1ea7u ra ch\u1ee7 y\u1ebfu c\u1ee7a ph\u1ea7n m\u1ec1m v\u00e0 qui tr\u00ecnh t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c cho \u1edf bi\u1ec3u \u0111\u1ed3 2 \u1edf tr\u00ean.<\/p>\n<p>\u00b0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 X\u00e2y d\u1ef1ng h\u01b0\u1edbng d\u1eabn ph\u1ea7n m\u1ec1m v\u1edbi th\u00f4ng tin \u0111\u1ea7y \u0111\u1ee7, d\u1ec5 hi\u1ec3u v\u00e0 bao h\u00e0m \u0111\u01b0\u1ee3c h\u1ebft c\u00e1c modules c\u1ee7a ph\u1ea7n m\u1ec1m<\/p>\n<p>&nbsp;<\/p>\n<p><b>III.\u00a0 <\/b><b>K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u0103m 2010 v\u00e0 th\u1ea3o lu\u1eadn<\/b><\/p>\n<p><b>\u00a0<\/b>Theo k\u1ebf ho\u1ea1ch \u0111\u00e3 \u0111\u01b0\u1ee3c duy\u1ec7t, n\u0103m 2010, \u0111\u1ec1 t\u00e0i \u0111\u00e3 th\u1ef1c hi\u1ec7n c\u00e1c n\u1ed9i dung:<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Kh\u1ea3o s\u00e1t ch\u1ecdn \u0111i\u1ec3m nghi\u00ean c\u1ee9u tr\u00ean to\u00e0n qu\u1ed1c<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u0110i\u1ec1u tra, \u0111o \u0111\u1ebfm 540 \u00f4 ti\u00eau chu\u1ea9n r\u1eebng tr\u1ed3ng \u0111\u1ec3 ki\u1ec3m tra c\u00e1c b\u1ea3ng bi\u1ec3u hi\u1ec7n c\u00f3<\/p>\n<p>&#8211;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 T\u00ednh to\u00e1n s\u1ed1 li\u1ec7u \u0111\u1ec3 ki\u1ec3m tra bi\u1ec3u m\u1ed9t s\u1ed1 lo\u00e0i c\u00e2y ch\u00ednh<\/p>\n<p>Tr\u1eeb ba lo\u00e0i c\u00e2y, B\u1ea1ch \u0111\u00e0n urophylla, Keo tai t\u01b0\u1ee3ng v\u00e0 Keo lai \u0111\u1ec1 t\u00e0i \u0111\u00e3 thu th\u1eadp \u0111\u01b0\u1ee3c s\u1ed1 li\u1ec7u \u0111\u1ee7 l\u1edbn \u0111\u1ec3 ki\u1ec3m tra bi\u1ec3u, c\u00e1c lo\u00e0i c\u00e2y c\u00f2n l\u1ea1i, do kinh ph\u00ed n\u0103m 2010 \u00edt n\u00ean ch\u01b0a th\u1ec3 \u0111o \u0111\u1ebfm \u0111\u1ee7 s\u1ed1 li\u1ec7u ki\u1ec3m tra. V\u00ec v\u1eady, \u0111\u1ec1 t\u00e0i ch\u1ec9 t\u00ednh to\u00e1n v\u00e0 ki\u1ec3m tra b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra kinh doanh c\u1ee7a 03 lo\u00e0i c\u00e2y n\u00e0y. K\u1ebft qu\u1ea3 ki\u1ec3m tra cho th\u1ea5y:<\/p>\n<p>Ki\u1ec3m tra bi\u1ec3u th\u1ec3 t\u00edch 03 lo\u00e0i c\u00e2y B\u1ea1ch \u0111\u00e0n urophylla, Keo tai t\u01b0\u1ee3ng v\u00e0 Keo lai cho th\u1ea5y, bi\u1ec3u th\u1ec3 t\u00edch \u0111\u00e3 l\u1eadp cho 03 lo\u00e0i n\u00e0y c\u00f3 sai s\u1ed1 l\u1edbn, sai s\u1ed1 x\u00e1c \u0111\u1ecbnh th\u1ec3 t\u00edch trung b\u00ecnh lo\u00e0i th\u1ea5p nh\u1ea5t l\u00e0 Keo tai t\u01b0\u1ee3ng l\u00e0 8 %, lo\u00e0i cao nh\u1ea5t l\u00e0 Keo lai sai s\u1ed1 trung b\u00ecnh l\u00ean t\u1edbi 18 %. \u0110\u1ed1i v\u1edbi bi\u1ec3u c\u1ea5p \u0111\u1ea5t, k\u1ebft qu\u1ea3 ki\u1ec3m tra c\u0169ng cho th\u1ea5y, \u0111\u01b0\u1eddng sinh tr\u01b0\u1edfng chi\u1ec1u cao c\u1ee7a c\u00e1c l\u00e2m ph\u1ea7n \u0111i\u1ec1u tra c\u1eaft \u0111\u01b0\u1eddng cong c\u1ea5p \u0111\u1ea5t l\u00fd thuy\u1ebft c\u1ee7a c\u00e1c bi\u1ec3u \u0111\u00e3 l\u1eadp. Ngo\u00e0i ra, bi\u1ec3u c\u1ea5p \u0111\u1ea5t c\u1ee7a m\u1ed9t s\u1ed1 lo\u00e0i kh\u00f4ng ph\u1ea3n \u00e1nh \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng hi\u1ec7n t\u1ea1i, \u0111\u1eb7c bi\u1ec7t l\u00e0 lo\u00e0i keo lai. Hay n\u00f3i c\u00e1ch kh\u00e1c bi\u1ec3u c\u1ea5p \u0111\u1ea5t c\u1ee7a c\u00e1c lo\u00e0i n\u00e0y c\u00f3 sai s\u1ed1 l\u1edbn v\u00e0 kh\u00f4ng c\u00f2n ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng.<\/p>\n<p>N\u00f3i t\u00f3m l\u1ea1i, k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u0103m \u0111\u1ea7u ti\u00ean cho th\u1ea5y, c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra kinh doanh r\u1eebng \u0111\u00e3 l\u1eadp \u0111\u01b0\u1ee3c cho 03 lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u00ednh \u1edf Vi\u1ec7t Nam l\u00e0 B\u1ea1ch \u0111\u00e0n Urophylla, Keo tai t\u01b0\u1ee3ng v\u00e0 Keo lai c\u00f3 sai s\u1ed1 l\u1edbn, kh\u00f4ng c\u00f2n ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng, v\u00ec v\u1eady c\u1ea7n thi\u1ebft ph\u1ea3i x\u00e2y d\u1ef1ng l\u1ea1i c\u00e1c bi\u1ec3u n\u00e0y.<\/p>\n<p><b>IV.\u00a0 <\/b><b>K\u1ebft lu\u1eadn v\u00e0 ki\u1ebfn ngh\u1ecb<\/b><\/p>\n<p><b>\u00a0<\/b>B\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh r\u1eebng l\u00e0 c\u00f4ng c\u1ee5 thi\u1ebft y\u1ebfu trong qu\u1ea3n l\u00fd r\u1eebng tr\u1ed3ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 r\u1eebng tr\u1ed3ng s\u1ea3n xu\u1ea5t. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u n\u0103m \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ec1 t\u00e0i cho th\u1ea5y, c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh \u0111\u00e3 l\u1eadp cho r\u1eebng tr\u1ed3ng 03 lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u00ednh \u1edf Vi\u1ec7t Nam, B\u1ea1ch \u0111\u00e0n urophylla, Keo tai t\u01b0\u1ee3ng v\u00e0 Keo lai kh\u00f4ng c\u00f2n s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c do sai s\u1ed1 l\u1edbn. V\u00ec v\u1eady, n\u0103m 2011 v\u00e0 2012 \u0111\u1ec1 t\u00e0i s\u1ebd ti\u1ebfp t\u1ee5c \u0111o \u0111\u1ebfm, thu th\u1eadp s\u1ed1 li\u1ec7u b\u1ed5 sung \u0111\u1ec3 ki\u1ec3m tra cho c\u00e1c lo\u00e0i c\u00f2n l\u1ea1i. Hi\u1ec7u ch\u1ec9nh bi\u1ec3u v\u00e0 x\u00e2y d\u1ef1ng n\u1ebfu c\u1ea7n thi\u1ebft<\/p>\n<p><b>\u00a0<\/b><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0Phan Minh S\u00e1ng I. \u0110\u1eb7t v\u1ea5n \u0111\u1ec1 Trong nh\u1eefng n\u0103m qua, c\u00e1c b\u1ea3ng bi\u1ec3u \u0111i\u1ec1u tra, kinh doanh r\u1eebng nh\u01b0 bi\u1ec3u th\u1ec3 t\u00edch, bi\u1ec3u c\u1ea5p \u0111\u1ea5t, bi\u1ec3u s\u1ea3n l\u01b0\u1ee3ng\u2026 \u00a0\u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng cho g\u1ed3m c\u00f3 h\u1ea7u h\u1ebft c\u00e1c lo\u00e0i c\u00e2y tr\u1ed3ng r\u1eebng ch\u1ee7 y\u1ebfu \u1edf n\u01b0\u1edbc ta v\u00e0 \u0111\u00e3 g\u00f3p ph\u1ea7n quan tr\u1ecdng cho [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[21,72],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/15117"}],"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=15117"}],"version-history":[{"count":1,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/15117\/revisions"}],"predecessor-version":[{"id":15120,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/15117\/revisions\/15120"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=15117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=15117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=15117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}