{"id":8651,"date":"2009-03-24T02:44:30","date_gmt":"2009-03-23T19:44:30","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/anh-huong-cua-phan-bon-den-sinh-truong-cua-bach-dan-tren-dat-phen-o-thanh-hoa-tinh-long-an\/"},"modified":"2019-09-25T10:05:29","modified_gmt":"2019-09-25T03:05:29","slug":"anh-huong-cua-phan-bon-den-sinh-truong-cua-bach-dan-tren-dat-phen-o-thanh-hoa-tinh-long-an","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/anh-huong-cua-phan-bon-den-sinh-truong-cua-bach-dan-tren-dat-phen-o-thanh-hoa-tinh-long-an\/","title":{"rendered":"\u1ea3NH H\u01b0\u1edfNG C\u1ee7A PH\u00e2N B\u00f3N \u0110\u1ebfN SiNH TR\u01b0\u1edfNG c\u1ee7a B\u1ea1CH \u0110\u00e0N TR\u00eaN \u0110\u1ea5T PH\u00e8N \u1edf TH\u1ea1NH HO\u00e1, T\u1ec9NH LONG AN"},"content":{"rendered":"

Fuminori Miyatake \u2014 Chuy\u00ean gia JICA<\/u><\/em><\/h3>\n
Ph\u1ea1m Th\u1ebf D\u0169ng, Ph\u1ea1m Ng\u1ecdc C\u01a1 <\/em><\/h6>\n

Ph\u00e2n vi\u1ec7n KHLN Nam B\u1ed9<\/em><\/p>\n

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

M\u1ed9t trong s\u1ed1 nh\u1eefng lo\u00e0i c\u00e2y \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 tr\u1ed3ng r\u1eebng tr\u00ean \u0111\u1ea5t ph\u00e8n \u1edf \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long l\u00e0 b\u1ea1ch \u0111\u00e0n (Eucalyptus<\/em>) v\u1edbi c\u00e1c lo\u00e0i camaldulensis <\/em>v\u00e0 tereticornis <\/em>(B\u1ed9 NN& PTNT, 1994). \u0110\u1ec3 n\u00e2ng cao s\u1ee9c sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng, b\u00ean c\u1ea1nh c\u00e1c k\u1ef9 thu\u1eadt th\u00e2m canh truy\u1ec1n th\u1ed1ng nh\u01b0 ch\u1ecdn gi\u1ed1ng, l\u00e0m \u0111\u1ea5t, vi\u1ec7c s\u1eed d\u1ee5ng ph\u00e2n b\u00f3n c\u00f3 xem x\u00e9t \u0111\u1ebfn kh\u00eda c\u1ea1nh m\u00f4i tr\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t trong c\u00e1c bi\u1ec7n ph\u00e1p c\u00f3 hi\u1ec7u qu\u1ea3 nhanh. D\u1ef1 \u00e1n “Ph\u00e1t tri\u1ec3n k\u1ef9 thu\u1eadt tr\u1ed3ng r\u1eebng tr\u00ean \u0111\u1ea5t ph\u00e8n \u1edf v\u00f9ng \u0111\u1ed3ng b\u1eb1ng s\u00f4ng C\u1eedu Long ” do Vi\u1ec7n Khoa h\u1ecdc L\u00e2m nghi\u1ec7p Vi\u1ec7t Nam ph\u1ed1i h\u1ee3p v\u1edbi C\u01a1 quan h\u1ee3p t\u00e1c qu\u1ed1c t\u1ebf Nh\u1eadt B\u1ea3n (JICA) \u0111\u00e3 ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m s\u1eed d\u1ee5ng ph\u00e2n b\u00f3n cho r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n tr\u00ean \u0111\u1ea5t ph\u00e8n t\u1ea1i t\u1ec9nh Long An. Sau \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 NC v\u1ec1 chuy\u00ean \u0111\u1ec1 n\u00e0y.<\/p>\n

1. M\u00f4 t\u1ea3 th\u00ed nghi\u1ec7m <\/strong><\/p>\n

– Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i Tr\u1ea1m Th\u1ef1c nghi\u1ec7m L\u00e2m nghi\u1ec7p Th\u1ea1nh Ho\u00e1, huy\u1ec7n Th\u1ea1nh Ho\u00e1 t\u1ec9nh Long An tr\u00ean \u0111\u1ea5t ph\u00e8n c\u00f3 c\u00e1c \u0111\u1eb7c tr\u01b0ng c\u01a1 b\u1ea3n nh\u01b0 sau:<\/p>\n

Khu v\u1ef1c 1:<\/u>\u0111\u1ea5t \u0111\u01b0\u1ee3c l\u00ean l\u00edp b\u1eb1ng th\u1ee7 c\u00f4ng v\u00e0o th\u00e1ng 5.1998, c\u00f3 b\u1ec1 r\u1ed9ng m\u1eb7t l\u00edp 3m, k\u00eanh r\u1ed9ng 5m, chi\u1ec1u cao l\u00edp 0.8m t\u00ednh t\u1eeb m\u1eb7t \u0111\u1ea5t t\u1ef1 nhi\u00ean. \u0110\u1eb7c tr\u01b0ng ph\u1eabu di\u1ec7n tr\u00ecnh b\u00e0y trong b\u1ea3ng 1.<\/p>\n

B\u1ea3ng 1. K\u1ebft qu\u1ea3 ph\u00e2n t\u00edch \u0111\u1ea5t tr\u01b0\u1edbc khi l\u00ean l\u00edp tr\u1ed3ng r\u1eebng th\u00ed nghi\u1ec7m<\/u><\/h4>\n\n\n\n\n\n\n\n\n\n
No.<\/strong><\/td>\n\u0110\u1ed9<\/strong><\/p>\n

s\u00e2u, cm<\/strong><\/td>\n

pH ( H20)<\/strong><\/td>\npH<\/strong><\/p>\n

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

Ch\u1ea5t<\/strong><\/p>\n

h\u1eefu c\u01a1 %<\/strong><\/td>\n

T\u1ed5ng s\u1ed1 %<\/strong><\/td>\nD\u1ec5 ti\u00eau,mg\/100g<\/strong><\/td>\nTrao \u0111\u1ed5i cation, meq\/100g<\/strong><\/td>\nTh\u00e0nh ph\u1ea7n c\u01a1 gi\u1edbi %<\/strong><\/td>\n<\/tr>\n
\u0111\u1ea5t t\u01b0\u01a1i<\/strong><\/td>\n\u0111\u1ea5t kh\u00f4<\/strong><\/td>\nN<\/strong><\/td>\nP205<\/strong><\/td>\nK20<\/strong><\/td>\nN<\/strong><\/td>\nP205<\/strong><\/td>\nK20<\/strong><\/td>\nCa<\/strong><\/td>\nMg<\/strong><\/td>\nAl<\/strong><\/td>\n2.0-0.02<\/strong><\/td>\n0.02-0.002<\/strong><\/td>\n< 0.002<\/strong><\/td>\n<\/tr>\n
0-15<\/td>\n3.84<\/td>\n3.83<\/td>\n3.61<\/td>\n7.76<\/td>\n0.24<\/td>\n0.05<\/td>\n0.49<\/td>\n10.5<\/td>\n4<\/td>\n9.1<\/td>\n1.2<\/td>\n0.5<\/td>\n5.3<\/td>\n42<\/td>\n28.6<\/td>\n29.4<\/td>\n<\/tr>\n
15-25<\/td>\n3.81<\/td>\n3.77<\/td>\n3.46<\/td>\n3.36<\/td>\n0.14<\/td>\n0.03<\/td>\n0.55<\/td>\n7<\/td>\n5<\/td>\n6.9<\/td>\n1.1<\/td>\n0.5<\/td>\n6.7<\/td>\n30.6<\/td>\n25.2<\/td>\n44.2<\/td>\n<\/tr>\n
8<\/td>\n25-55<\/td>\n3.49<\/td>\n3.44<\/td>\n3.13<\/td>\n2.64<\/td>\n0.07<\/td>\n0.03<\/td>\n0.66<\/td>\n3.5<\/td>\n11.2<\/td>\n1.2<\/td>\n1<\/td>\n8.3<\/td>\n31<\/td>\n19.5<\/td>\n49.5<\/td>\n<\/tr>\n
55-80<\/td>\n3.53<\/td>\n3.42<\/td>\n3.15<\/td>\n3.83<\/td>\n0.84<\/td>\n0.02<\/td>\n0.62<\/td>\n3.5<\/td>\n16.5<\/td>\n1.5<\/td>\n1<\/td>\n8.2<\/td>\n14.2<\/td>\n34.4<\/td>\n51.4<\/td>\n<\/tr>\n
80-150<\/td>\n3.78<\/td>\n3.08<\/td>\n2.82<\/td>\n5.17<\/td>\n0.84<\/td>\n0.03<\/td>\n0.6<\/td>\n3.5<\/td>\n9.1<\/td>\n1.2<\/td>\n1.1<\/td>\n7.2<\/td>\n25.6<\/td>\n32.2<\/td>\n42.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Khu v\u1ef1c 2<\/u>: \u0111\u1ea5t \u0111\u01b0\u1ee3c l\u00ean l\u00edp t\u1eeb n\u0103m 1989 b\u1eb1ng th\u1ee7 c\u00f4ng, c\u00f3 k\u00edch th\u01b0\u1edbc r\u1ed9ng 3 m, k\u00eanh r\u1ed9ng 4 m , chi\u1ec1u cao l\u00edp \u0111\u1ea5t t\u00ednh t\u1eeb m\u1eb7t \u0111\u1ea5t t\u1ef1 nhi\u00ean 0,6 m, \u0111\u1ea5t \u0111\u00e3 \u0111\u01b0\u1ee3c tr\u1ed3ng b\u1ea1ch \u0111\u00e0n lu\u00e2n k\u1ef3 1 khai th\u00e1c v\u00e0o th\u00e1ng 3 n\u0103m 1997.<\/p>\n

– Lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 c\u00e2y tr\u1ed3ng trong th\u00ed nghi\u1ec7m<\/p>\n

C\u00e1c lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 b\u1ea1ch \u0111\u00e0n trong th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong b\u1ea3ng 2<\/p>\n

B\u1ea3ng 2. C\u00e1c lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 b\u1ea1ch \u0111\u00e0n d\u00f9ng trong th\u00ed nghi\u1ec7m<\/strong><\/p>\n\n\n\n\n
N\u01a1i th\u00ed nghi\u1ec7m<\/strong><\/td>\nLo\u00e0i c\u00e2y<\/strong><\/td>\nXu\u1ea5t x\u1ee9 \/ m\u00e3 s\u1ed1 l\u00f4 h\u1ea1t c\u1ee7a<\/strong><\/p>\n

CSIRO<\/strong><\/td>\n

K\u00ed hi\u1ec7u trong th\u00ed nghi\u1ec7m<\/strong><\/td>\n<\/tr>\n
Khu v\u1ef1c 1<\/p>\n

Khu v\u1ef1c 2<\/td>\n

E.camaldulensis<\/em><\/p>\n

<\/h1>\n

E.camaldulensis<\/em><\/h1>\n

E.tereticornis<\/em><\/td>\n

Laura R. <\/em>Australia \u2014 <\/em>18176<\/p>\n

Kennedy R. <\/em>Australia-18242<\/p>\n

Morehead R. <\/em>Australia-19105<\/p>\n

Emu creek petford. <\/em>Aus.-19163<\/p>\n

Laura R. Australia- 18276<\/em><\/h5>\n

Oro bay<\/em> c\u00f1a PNG \u2014 13399<\/td>\n

E 6<\/p>\n

E 3<\/p>\n

E 4<\/u><\/h2>\n

E 5<\/p>\n

E 6<\/p>\n

E 1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

– Lo\u1ea1i ph\u00e2n s\u1eed d\u1ee5ng:<\/p>\n

+ Ph\u00e2n l\u00e2n V\u0103n \u0110i\u1ec3n v\u1edbi th\u00e0nh ph\u1ea7n P2<\/sub>05 <\/sub>-17%, Ca0 28-34%, Mg0 15-18%, Si0 24-30%, m\u1ed9t s\u1ed1 nguy\u00ean t\u1ed1 vi l\u01b0\u1ee3ng kh\u00e1c.<\/p>\n

+ Ph\u00e2n NPK c\u1ee7a Philippine v\u1edbi th\u00e0nh ph\u1ea7n \u0111\u1ea1m 16 %, l\u00e2n d\u1ec5 ti\u00eau P2<\/sub>05 <\/sub>16 %, K2<\/sub>0 8% v\u00e0 sulphur 13 %.<\/p>\n

Ch\u1ec9 s\u1ed1 ghi d\u01b0\u1edbi lo\u1ea1i ph\u00e2n trong c\u00e1c b\u1ea3ng s\u1ed1 li\u1ec7u l\u00e0 li\u1ec1u l\u01b0\u1ee3ng ph\u00e2n d\u00f9ng trong th\u00ed nghi\u1ec7m v\u1edbi \u0111\u01a1n v\u1ecb t\u00ednh l\u00e0 gram\/c\u00e2y.<\/p>\n

– Ph\u01b0\u01a1ng th\u1ee9c b\u00f3n: b\u00f3n l\u00f3t – h\u1ed7n h\u1ee3p ph\u00e2n \u0111\u01b0\u1ee3c tr\u1ed9n \u0111\u1ec1u v\u1edbi \u0111\u1ea5t trong h\u1ed1 tr\u01b0\u1edbc khi tr\u1ed3ng1 tu\u1ea7n.<\/p>\n

– Ph\u01b0\u01a1ng ph\u00e1p b\u1ed1 tr\u00ed th\u00ed nghi\u1ec7m: th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c b\u1ed1 tr\u00ed theo ki\u1ec3u ph\u00e2n kh\u1ed1i h\u1ec7 th\u1ed1ng. M\u1ed7i kh\u1ed1i bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c c\u00f4ng th\u1ee9c th\u1eed nghi\u1ec7m v\u1ec1 ph\u00e2n b\u00f3n. S\u1ed1 l\u1ea7n l\u1eb7p l\u1ea1i th\u00ed nghi\u1ec7m 3 l\u1ea7n.<\/p>\n

+ Khu v\u1ef1c 1: di\u1ec7n t\u00edch m\u1ed7i kh\u1ed1i 178 m2<\/sup> (33 x 49m), di\u1ec7n t\u00edch m\u1ed7i \u00f4 TN 297m2<\/sup> (33 x 9m) v\u1edbi 33 c\u00e2y\/\u00f4.<\/p>\n

+ Khu v\u1ef1c 2: di\u1ec7n t\u00edch m\u1ed7i kh\u1ed1i 1920m2<\/sup> (80 x 24m), di\u1ec7n t\u00edch m\u1ed7i \u00f4 TN 640m2<\/sup> (80 x 8 m) v\u1edbi 80 c\u00e2y\/\u00f4.<\/p>\n

– Ph\u01b0\u01a1ng ph\u00e1p thu th\u1eadp v\u00e0 x\u1eed l\u00ed s\u1ed1 li\u1ec7u: m\u1ed7i \u00f4 th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c \u0111o 30 c\u00e2y v\u1ec1 c\u00e1c ch\u1ec9 ti\u00eau \u0111\u01b0\u1eddng k\u00ednh D1,3<\/sub>, chi\u1ec1u cao v\u00fat ng\u1ecdn H. Gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a c\u00e1c \u00f4 l\u00e0m c\u01a1 s\u1edf so s\u00e1nh k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m.<\/p>\n

– Th\u1eddi gian tr\u1ed3ng: th\u00e1ng 12 n\u0103m 1998<\/p>\n

2. K\u1ebft<\/strong>qu\u1ea3 nghi\u00ean c\u1ee9u v\u00e0 th\u1ea3o lu\u1eadn<\/strong><\/p>\n

2.1 <\/em>\u1ea3nh<\/em>h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n \u0111\u1ebfn sinh tr\u01b0\u1edfng b\u1ea1ch \u0111\u00e0n tr\u1ed3ng tr\u00ean l\u00edp m\u1edbi \u0111\u00e0o ( khu v\u1ef1c 1)<\/em><\/p>\n

– Sau khi tr\u1ed3ng 3,5 n\u0103m h\u1ea7u h\u1ebft c\u00e1c c\u00f4ng th\u1ee9c c\u00f3 s\u1eed d\u1ee5ng ph\u00e2n b\u00f3n \u0111\u00e3 l\u00e0m t\u0103ng sinh tr\u01b0\u1edfng v\u1ec1 \u0111\u01b0\u1eddng k\u00ednh t\u1eeb 20\u2014 30 % v\u00e0 v\u1ec1 chi\u1ec1u cao t\u1eeb 30-35 % so v\u1edbi kh\u00f4ng b\u00f3n.<\/p>\n

– M\u1ee9c \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n c\u0169ng gi\u1ea3m d\u1ea7n theo th\u1eddi gian. \u1ea3nhh\u01b0\u1edfng r\u00f5 n\u00e9t nh\u1ea5t l\u00e0 sau 5 th\u00e1ng tu\u1ed5i (b\u00ecnh qu\u00e2n chung v\u1ec1 t\u0103ng sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh so \u0111\u1ed1i ch\u1ee9ng l\u00e0 42.2 %, chi\u1ec1u cao l\u00e0 41,9%), \u0111\u1ebfn 2,5 tu\u1ed5i c\u00e1c ch\u1ec9 s\u1ed1 \u0111\u00f3 l\u00e0 18.63 % v\u00e0 11.9 %.<\/p>\n

– C\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n c\u00f3 c\u1ee7a NPK sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n b\u00f3n \u0111\u01a1n l\u1ebb l\u00e2n ho\u1eb7c kh\u00f4ng b\u00f3n ph\u00e2n.<\/p>\n

– Kh\u00f4ng th\u1ea5y nh\u1eefng thay \u0111\u1ed5i ti\u00eau c\u1ef1c v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng n\u01b0\u1edbc v\u00e0 \u0111\u1ea5t gi\u1eefa b\u00f3n v\u00e0 kh\u00f4ng b\u00f3n ph\u00e2n.<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong b\u1ea3ng 3.<\/p>\n

B\u1ea3ng 3. <\/strong>\u1ea3nh<\/strong>h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n \u0111\u1ebfn sinh tr\u01b0\u1edfng E.camldulensis<\/em> laura R.<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Th\u00ed nghi\u00d6m<\/strong><\/td>\nTh\u1eddi gian sau tr\u00e5ng<\/td>\n<\/tr>\n
6 th\u00e1ng tu\u1ed5i<\/strong><\/td>\n1 , 5 tn\u0103m <\/strong><\/td>\n2, 5 n\u0103m <\/strong><\/td>\n<\/td>\n3 , 5 n\u0103m<\/strong><\/td>\n<\/td>\n<\/tr>\n
D1.3<\/strong><\/p>\n

cm<\/strong><\/td>\n

% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n

H,m<\/strong><\/td>\n% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n

D1.3<\/strong><\/p>\n

cm<\/strong><\/td>\n

% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n

H,m<\/strong><\/td>\n% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n

D1.3<\/strong><\/p>\n

cm<\/strong><\/td>\n

% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n

H,m<\/strong><\/td>\n% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n

D1.3<\/strong><\/p>\n

cm<\/strong><\/td>\n

% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n

H,m<\/strong><\/td>\n% v\u01b0\u1ee3t so<\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/td>\n<\/tr>\n

\u0110\u1ed1i ch\u1ee9ng <\/strong><\/td>\n3.13<\/strong><\/td>\n2.01<\/strong><\/td>\n5.29<\/strong><\/td>\n5.55<\/strong><\/td>\n7.36<\/strong><\/td>\n8.13<\/strong><\/td>\n8.38<\/strong><\/td>\n9.04<\/strong><\/td>\n<\/tr>\n
P 100<\/strong><\/td>\n3.28<\/strong><\/td>\n4.8<\/td>\n2.22<\/strong><\/td>\n10.4<\/td>\n6.07<\/strong><\/td>\n14.7<\/td>\n5.72<\/strong><\/td>\n3.1<\/td>\n8.43<\/strong><\/td>\n14.53<\/td>\n8.93<\/strong><\/td>\n9.8<\/td>\n10.29<\/strong><\/td>\n22.7<\/td>\n11.76<\/strong><\/td>\n30<\/td>\n<\/tr>\n
NPK 100<\/strong><\/td>\n4.62<\/strong><\/td>\n36.1<\/td>\n2.94<\/strong><\/td>\n46.2<\/td>\n6.74<\/strong><\/td>\n27.4<\/td>\n6.39<\/strong><\/td>\n15.1<\/td>\n8.50<\/strong><\/td>\n15.48<\/td>\n8.65<\/strong><\/td>\n6.4<\/td>\n10.83<\/strong><\/td>\n29.2<\/td>\n11.83<\/strong><\/td>\n30.8<\/td>\n<\/tr>\n
P50 NPK 100<\/strong><\/td>\n4.78<\/strong><\/td>\n52.7<\/td>\n3.04<\/strong><\/td>\n51.2<\/td>\n6.48<\/strong><\/td>\n22.4<\/td>\n6.43<\/strong><\/td>\n12.4<\/td>\n8.95<\/strong><\/td>\n21.60<\/td>\n9.00<\/strong><\/td>\n10.7<\/td>\n10.44<\/strong><\/td>\n24.5<\/td>\n11.86<\/strong><\/td>\n31.1<\/td>\n<\/tr>\n
P100 NPK 100<\/strong><\/td>\n5.29<\/strong><\/td>\n69<\/td>\n3.08<\/strong><\/td>\n53.2<\/td>\n6.74<\/strong><\/td>\n27.4<\/td>\n6.63<\/strong><\/td>\n19.4<\/td>\n8.56<\/strong><\/td>\n16.30<\/td>\n9.45<\/strong><\/td>\n16.2<\/td>\n10.02<\/strong><\/td>\n19.5<\/td>\n12.00<\/strong><\/td>\n32.7<\/td>\n<\/tr>\n
P100 NPK 50<\/strong><\/td>\n4.66<\/strong><\/td>\n48.8<\/td>\n2.99<\/strong><\/td>\n48.7<\/td>\n6.98<\/strong><\/td>\n31.2<\/td>\n6.63<\/strong><\/td>\n19.4<\/td>\n9.22<\/strong><\/td>\n25.27<\/td>\n9.46<\/strong><\/td>\n16.4<\/td>\n10.72<\/strong><\/td>\n27.9<\/td>\n12.27<\/strong><\/td>\n35.7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2.2 <\/em>\u1ea3nh<\/em>h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n \u0111\u1ebfn sinh tr\u01b0\u1edfng b\u1ea1ch \u0111\u00e0n tr\u00ean l\u00edp \u0111\u1ea5t c\u0169 (khu v\u1ef1c 2) theo lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 kh\u00e1c nhau.<\/em><\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y trong b\u1ea3ng 4 v\u00e0 5 cho th\u1ea5y :<\/p>\n

+ \u1edfb\u1ea3ng 4<\/p>\n

Vi\u1ec7c s\u1eed d\u1ee5ng ph\u00e2n b\u00f3n \u0111\u1ed1i v\u1edbi E.camaldulensis<\/em> xu\u1ea5t x\u1ee9 emu creek Petford (E5) cho sinh tr\u01b0\u1edfng \u0111\u01b0\u1eddng k\u00ednh c\u00e2y t\u0103ng t\u1eeb 50 \u0111\u1ebfn 135 % v\u00e0 chi\u1ec1u cao t\u1eeb 10-74 % so \u0111\u1ed1i ch\u1ee9ng sau khi tr\u1ed3ng 5 th\u00e1ng tu\u1ed5i.<\/p>\n

B\u1ea3ng 4. \u1ea3nh h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n sau khi tr\u1ed3ng 5 th\u00e1ng tu\u1ed5i<\/strong><\/p>\n\n\n\n\n
C\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m<\/strong><\/td>\nD, cm<\/strong><\/td>\n% so \u0111\u1ed1i ch\u1ee9ng<\/strong><\/td>\nH, m<\/strong><\/td>\n% so \u0111\u1ed1i ch\u1ee9ng<\/strong><\/td>\n<\/tr>\n
Kh\u00f4ng b\u00f3n ph\u00e2n<\/p>\n

P100<\/p>\n

NPK 100<\/p>\n

P50+NPK 50<\/td>\n

1,71<\/p>\n

2,57<\/p>\n

4,03<\/p>\n

3,72<\/p>\n

2,74<\/p>\n

3,81<\/p>\n

3,69<\/td>\n

–<\/p>\n

50,2<\/p>\n

135,6<\/p>\n

117,5<\/p>\n

60,2<\/p>\n

122,8<\/p>\n

115,7<\/td>\n

1,63<\/p>\n

2,08<\/p>\n

2,66<\/p>\n

2,84<\/p>\n

1,79<\/p>\n

2,84<\/p>\n

2,70<\/td>\n

–<\/p>\n

27,6<\/p>\n

63,1<\/p>\n

74,2<\/p>\n

9,8<\/p>\n

74,2<\/p>\n

65,6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

+ T\u1ea1i b\u1ea3ng 5<\/p>\n

N\u1ebfu so s\u00e1nh sinh tr\u01b0\u1edfng c\u1ee7a hai lo\u00e0i v\u00e0 5 xu\u1ea5t x\u1ee9 b\u1ea1ch \u0111\u00e0n trong c\u00f9ng \u0111i\u1ec1u ki\u1ec7n b\u00f3n ph\u00e2n ta th\u1ea5y:<\/p>\n

– Sau khi tr\u1ed3ng 3,5 n\u0103m kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c nhau r\u00f5 r\u1ec7t gi\u1eefa c\u00e1c c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c xu\u1ea5t x\u1ee9 th\u00ed nghi\u1ec7m, nh\u01b0ng trong c\u00f9ng m\u1ed9t c\u00f4ng th\u1ee9c b\u00f3n ph\u00e2n, c\u00e1c xu\u1ea5t x\u1ee9 E4, E5 v\u00e0 E6 sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n E1 v\u00e0 E3.<\/p>\n

– N\u1ebfu so s\u00e1nh gi\u1eefa c\u00e1c lo\u00e0i th\u00ec h\u1ea7u h\u1ebft c\u00e1c xu\u1ea5t x\u1ee9 thu\u1ed9c lo\u00e0i camaldulensis <\/em>c\u00f3 sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi lo\u00e0i tereticornis<\/em>.<\/p>\n

– Nh\u00ecn chung c\u00e1c c\u00f4ng th\u1ee9c c\u00f3 b\u00f3n NPK ho\u1eb7c b\u00f3n ph\u1ed1i h\u1ee3p NPK v\u1edbi l\u00e2n cho sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n so v\u1edbi ch\u1ec9 d\u00f9ng c\u00f3 l\u00e2n ho\u1eb7c ch\u1ec9 NPK.<\/p>\n

– C\u0169ng nh\u01b0 k\u1ebft qu\u1ea3 ch\u1ec9 ra \u1edf b\u1ea3ng 4, \u1ea3nh h\u01b0\u1edfng c\u1ee7a b\u00f3n ph\u00e2n r\u00f5 r\u1ec7t nh\u1ea5t trong th\u1eddi gian m\u1edbi tr\u1ed3ng<\/p>\n

B\u1ea3ng 5. <\/strong>\u1ea3nh<\/strong>h\u01b0\u1edfng c\u1ee7a b\u00f3n ph\u00e2n \u0111\u1ebfn c\u00e1c xu\u1ea5t x\u1ee9 b\u1ea1ch \u0111\u00e0n trong th\u00ed nghi\u1ec7m<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Ph\u00e2n b\u00f3n<\/td>\nTh\u1eddi gian sau khi tr\u1ed3ng<\/strong><\/td>\n<\/tr>\n
0,5 n\u0103m<\/strong><\/td>\n1,5 n\u0103m<\/strong><\/td>\n2,5 n\u0103m<\/strong><\/td>\n3,5 n\u0103m<\/strong><\/td>\n<\/tr>\n
P100<\/td>\nNPK100<\/td>\nP50 + NPK 50<\/td>\nP100<\/td>\nNPK100<\/td>\nP50 + NPK 50<\/td>\nP100<\/td>\nNPK100<\/td>\nP50 + NPK 50<\/td>\nP100<\/td>\nNPK 100<\/td>\nP 50 + NPK 50<\/td>\n<\/tr>\n
Lo\u00b5i \/ xu\u00cat x\u00f8<\/strong><\/p>\n

(k\u00dd hi\u00d6u trong TN)<\/td>\n

D1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/td>\nH,m<\/td>\nD1.3,<\/p>\n

cm<\/td>\n

H,m<\/td>\nD1.3,<\/p>\n

cm<\/td>\n

H,m<\/td>\nD1.3,cm<\/td>\nH,m<\/td>\n<\/tr>\n
E.tereticornis<\/em><\/strong><\/td>\n<\/tr>\n
Orobay PNG ( E1)<\/em><\/td>\n2.24<\/td>\n1.58<\/td>\n2.89<\/td>\n1.92<\/td>\n3.02<\/td>\n2.17<\/td>\n4.43<\/td>\n4.37<\/td>\n5.48<\/td>\n4.94<\/td>\n5.14<\/td>\n5.24<\/td>\n5.61<\/td>\n5.10<\/td>\n6.55<\/td>\n6.30<\/td>\n6.17<\/td>\n5.41<\/td>\n8.75<\/td>\n8.96<\/td>\n8.91<\/td>\n9.33<\/td>\n8.74<\/td>\n9.56<\/td>\n<\/tr>\n
E.camaldulensis<\/em><\/strong><\/td>\n<\/tr>\n
Kenedy R.Aus .,( E3)<\/em><\/td>\n2.30<\/td>\n1.69<\/td>\n2.66<\/td>\n1.91<\/td>\n3.48<\/td>\n2.35<\/td>\n4.98<\/td>\n5.28<\/td>\n5.19<\/td>\n5.44<\/td>\n5.40<\/td>\n5.72<\/td>\n7.10<\/td>\n7.54<\/td>\n6.77<\/td>\n7.57<\/td>\n6.99<\/td>\n8.06<\/td>\n8.75<\/td>\n9.08<\/td>\n8.25<\/td>\n9.25<\/td>\n8.5<\/td>\n9.21<\/td>\n<\/tr>\n
<\/td>\n3.43<\/td>\n2.17<\/td>\n4.64<\/td>\n2.67<\/td>\n4.54<\/td>\n2.63<\/td>\n<\/tr>\n
Morehead R.Aus., (E4)<\/em><\/td>\n3.14<\/td>\n2.20<\/td>\n3.99<\/td>\n2.55<\/td>\n4.23<\/td>\n2.55<\/td>\n5.44<\/td>\n5.79<\/td>\n6.20<\/td>\n6.39<\/td>\n5.95<\/td>\n6.12<\/td>\n7.24<\/td>\n7.96<\/td>\n8.07<\/td>\n8.06<\/td>\n7.74<\/td>\n7.55<\/td>\n9.04<\/td>\n9.74<\/td>\n8.65<\/td>\n9.38<\/td>\n9.31<\/td>\n10.21<\/td>\n<\/tr>\n
Emu creek petford.Aus.,(E5)<\/em><\/td>\n4.03<\/td>\n2.66<\/td>\n2.74<\/td>\n1.79<\/td>\n3.69<\/td>\n2.70<\/td>\n5.10<\/td>\n5.68<\/td>\n6.49<\/td>\n6.60<\/td>\n6.22<\/td>\n6.41<\/td>\n6.82<\/td>\n7.63<\/td>\n8.16<\/td>\n8.88<\/td>\n7.99<\/td>\n8.77<\/td>\n8.98<\/td>\n9.62<\/td>\n8.95<\/td>\n9.53<\/td>\n8.68<\/td>\n9.29<\/td>\n<\/tr>\n
Laura R.Aus.,(E6)<\/em><\/td>\n2.83<\/td>\n1.95<\/td>\n4.36<\/td>\n2.67<\/td>\n4.07<\/td>\n2.49<\/td>\n4.55<\/td>\n4.47<\/td>\n5.88<\/td>\n5.79<\/td>\n6.04<\/td>\n6.20<\/td>\n7.12<\/td>\n6.97<\/td>\n7.95<\/td>\n8.20<\/td>\n8.15<\/td>\n9.43<\/td>\n9.55<\/td>\n10.08<\/td>\n9.6<\/td>\n10.2<\/td>\n9.83<\/td>\n10.39<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2.3 <\/em>\u1ea3nh<\/em>h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n tr\u00ean l\u00edp \u0111\u1ea5t c\u0169 v\u00e0 m\u1edbi.<\/em><\/p>\n

Nh\u01b0 \u0111\u00e3 tr\u00ecnh b\u00e0y, th\u00ed nghi\u1ec7m ti\u1ebfn h\u00e0nh tr\u00ean hai lo\u1ea1i \u0111\u1ea5t \u0111\u01b0\u1ee3c l\u00ean l\u00edp theo th\u1eddi gian kh\u00e1c nhau (m\u1ee5c1). K\u1ebft qu\u1ea3 s\u1eed d\u1ee5ng ph\u00e2n l\u00e2n v\u00e0 NPK \u0111\u01b0\u1ee3c ch\u1ec9 ra trong b\u1ea3ng 6.<\/p>\n

B\u1ea3ng 6. <\/strong>\u1ea3nh<\/strong>h\u01b0\u1edfng c\u1ee7a ph\u00e2n b\u00f3n \u0111\u1ebfn sinh tr\u01b0\u1edfng c\u1ee7a b\u1ea1ch \u0111\u00e0n sau 5 th\u00e1ng tr\u1ed3ng tr\u00ean l\u00edp \u0111\u1ea5t c\u00f3 th\u1eddi gian l\u00ean l\u00edp kh\u00e1c nhau<\/strong><\/p>\n\n\n\n\n
C\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m<\/strong><\/td>\nD,cm<\/strong><\/td>\n% v\u01b0\u1ee3t so \u0111\u1ed1i ch\u1ee9ng<\/strong><\/td>\nH,m<\/strong><\/td>\n% v\u01b0\u1ee3t so<\/strong><\/p>\n

\u0111\u1ed1i ch\u1ee9ng<\/strong><\/td>\n<\/tr>\n

P100<\/strong><\/p>\n

– Tr\u00ean l\u00edp n\u0103m 1989<\/p>\n

– Tr\u00ean l\u00edp n\u0103m 1998<\/p>\n

NPK100<\/strong><\/p>\n

– Tr\u00ean l\u00edp n\u0103m 1989<\/p>\n

– Tr\u00ean l\u00edp n\u0103m 1998<\/td>\n

2,83<\/p>\n

3,28<\/p>\n

4,36<\/p>\n

4,62<\/td>\n

–<\/p>\n

15,9<\/p>\n

–<\/p>\n

5,9<\/td>\n

1,95<\/p>\n

2,22<\/p>\n

2,67<\/p>\n

2,94<\/td>\n

–<\/p>\n

13,8<\/p>\n

–<\/p>\n

10,1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1eeb k\u1ebft qu\u1ea3 n\u00e0y cho th\u1ea5y, trong c\u00f9ng \u0111i\u1ec1u ki\u1ec7n b\u00f3n ph\u00e2n, b\u1ea1ch \u0111\u00e0n tr\u1ed3ng tr\u00ean l\u00edp \u0111\u1ea5t m\u1edbi l\u00e0m, cho sinh tr\u01b0\u1edfng t\u1ed1t h\u01a1n c\u1ea3 v\u1ec1 chi\u1ec1u cao l\u1eabn \u0111\u01b0\u1eddng k\u00ednh so v\u1edbi tr\u1ed3ng tr\u00ean \u0111\u1ea5t \u0111\u00e3 l\u00ean l\u00edp t\u1eeb tr\u01b0\u1edbc, \u0111\u00e3 qua m\u1ed9t k\u1ef3 tr\u1ed3ng b\u1ea1ch \u0111\u00e0n. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch b\u1edfi \u0111\u1ed9 ph\u00ec c\u1ee7a \u0111\u1ea5t tr\u00ean l\u00edp \u0111\u1ea5t c\u0169 \u0111\u00e3 b\u1ecb gi\u1ea3m s\u00fat, v\u00e0 do \u0111\u00f3 h\u01b0\u1edbng s\u1eed d\u1ee5ng ph\u00e2n cho tr\u1ed3ng r\u1eebng c\u00e1c lu\u00e2n k\u1ef3 k\u1ebf ti\u1ebfp l\u00e0 c\u1ea7n thi\u1ebft.<\/p>\n

3. K\u1ebft lu\u1eadn<\/strong><\/p>\n

S\u1eed d\u1ee5ng ph\u00e2n b\u00f3n \u0111\u00e3 l\u00e0m t\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a c\u00e2y tr\u1ed3ng, r\u00f5 r\u1ec7t nh\u1ea5t trong nh\u1eefng n\u0103m \u0111\u1ea7u.<\/p>\n

Ph\u00e2n b\u00f3n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng d\u1ea1ng ph\u1ed1i h\u1ee3p gi\u1eefa l\u00e2n v\u00e0 NPK t\u1ecf ra c\u00f3 hi\u1ec7u qu\u1ea3 h\u01a1n d\u00f9ng c\u00e1c lo\u1ea1i ph\u00e2n \u0111\u01a1n l\u1ebb.<\/p>\n

Sau m\u1ed9t lu\u00e2n k\u1ef3 tr\u1ed3ng r\u1eebng \u0111\u1ed9 ph\u00ec c\u1ee7a \u0111\u1ea5t \u0111\u00e3 gi\u1ea3m c\u1ea7n t\u0103ng c\u01b0\u1eddng vi\u1ec7c s\u1eed d\u1ee5ng ph\u00e2n b\u00f3n nh\u1eb1m th\u00fac \u0111\u1ea9y kh\u1ea3 n\u0103ng sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng.<\/p>\n

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

– FAO. B\u1ea1ch \u0111\u00e0n trong tr\u1ed3ng r\u1eebng. Nh\u00e0 xu\u1ea5t b\u1ea3n N\u00f4ng nghi\u1ec7p 1990.<\/p>\n

– Ho\u00e0ng Ch\u01b0\u01a1ng. K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u kh\u1ea3o nghi\u1ec7m lo\u00e0i v\u00e0 xu\u1ea5t x\u1ee9 b\u1ea1ch \u0111\u00e0n \u1edf Vi\u1ec7t Nam. B\u00e1o c\u00e1o khoa h\u1ecdc, H\u00e0 N\u1ed9i 1990.<\/p>\n

– Ph\u1ea1m Th\u1ebf D\u0169ng,Tr\u1ea7n V\u0103n S\u00e2m. B\u00f3n ph\u00e2n cho r\u1eebng tr\u1ed3ng b\u1ea1ch \u0111\u00e0n \u1edf Xu\u00e2n L\u1ed9c -\u0110\u1ed3ng Nai. T\u1ea1p ch\u00ed LN s\u1ed1 3.1993.<\/p>\n

– \u0110\u1ed7 \u0110\u00ecnh S\u00e2m, Nguy\u1ec5n Ng\u1ecdc B\u00ecnh. Evaluation of potential use of forest land in the Me Kong River Delta. Agricultural Publishing House. Ha Noi 1999.<\/p>\n

Summary<\/strong><\/p>\n

E. camadulensis & E.tereticornis <\/em>are species selected for forest plantation to supply paper raw material in the Mekongriver delta. To attain high word productivity it is necessary to use intensive management techniques such as fertilizer application.<\/p>\n

This paper presents some researches on effect of fertilizer application on growth of E. camadulensis & E.tereticornis. <\/em>Growth of 3.5 year \u2013 old plantation increases 20-30% in D and 0-35% in H as compared with plantation without fertilizer application. Increase in growth is strongly manifested in 5 moth-old plantation. Response to fertilizer application is not different between eucalypt provenances. Combination of NPK and phosphate gives better result than application of either one. Soil fertility under eucalypt plantationis much decreased after 8 years and fertilizer application is needed.<\/p>\n","protected":false},"excerpt":{"rendered":"

M\u1ed9t trong s\u1ed1 nh\u1eefng loài cây \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 tr\u1ed3ng r\u1eebng trên \u0111\u1ea5t phèn \u1edf \u0111\u1ed3ng b\u1eb1ng sông C\u1eedu Long là b\u1ea1ch \u0111àn (Eucalyptus) v\u1edbi các loài camaldulensis và tereticornis (B\u1ed9 NN& PTNT, 1994). \u0110\u1ec3 nâng cao s\u1ee9c sinh tr\u01b0\u1edfng c\u1ee7a r\u1eebng tr\u1ed3ng, bên c\u1ea1nh các k\u1ef9 thu\u1eadt thâm canh truy\u1ec1n th\u1ed1ng nh\u01b0 ch\u1ecdn gi\u1ed1ng, làm \u0111\u1ea5t, vi\u1ec7c s\u1eed d\u1ee5ng phân bón có xem xét \u0111\u1ebfn khía c\u1ea1nh môi tr\u01b0\u1eddng \u0111\u01b0\u1ee3c coi là m\u1ed9t trong các bi\u1ec7n pháp có hi\u1ec7u qu\u1ea3 nhanh.<\/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\/8651"}],"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=8651"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8651\/revisions"}],"predecessor-version":[{"id":19267,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8651\/revisions\/19267"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}