{"id":8601,"date":"2009-03-24T02:25:03","date_gmt":"2009-03-23T19:25:03","guid":{"rendered":"http:\/\/vafs.gov.vn\/vn\/2009\/03\/nhan-giong-luong-bang-chiet-canh\/"},"modified":"2019-09-25T10:14:45","modified_gmt":"2019-09-25T03:14:45","slug":"nhan-giong-luong-bang-chiet-canh","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/vn\/nhan-giong-luong-bang-chiet-canh\/","title":{"rendered":"NH\u00e2n gi\u1ed1ng lu\u1ed3ng b\u1eb1ng chi\u1ebft c\u00e0nh"},"content":{"rendered":"

L\u00ea Quang Li\u00ean<\/em><\/strong><\/p>\n

Trung t\u00e2m NC TN L\u00e2m sinh C\u1ea7u Hai<\/em><\/p>\n

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

Lu\u1ed3ng (Dendrocalamus membranaceus<\/em>) l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y thu\u1ed9c h\u1ecd Bambusacaea<\/em> m\u1ecdc theo c\u1ee5m, sinh tr\u01b0\u1edfng nhanh. Sau m\u1ed9t ng\u00e0y \u0111\u00eam m\u0103ng lu\u1ed3ng c\u00f3 th\u1ec3 cao 0,6 \u2013 0,7m, sau 45 ng\u00e0y c\u00e2y lu\u1ed3ng \u0111\u00e3 \u0111\u1ea1t chi\u1ec1u cao 18 – 20m v\u1edbi \u0111\u01b0\u1eddng k\u00ednh ngang ng\u1ef1c 10 \u2013 12cm, n\u1eb7ng 35 \u2013 40kg. Sau 2 n\u0103m c\u00f3 th\u1ec3 khai th\u00e1c l\u00e0m nguy\u00ean li\u1ec7u gi\u1ea5y ho\u1eb7c l\u00e0m c\u1ed9t nh\u00e0 v\u00e0 s\u1eed d\u1ee5ng cho c\u00e1c m\u1ee5c \u0111\u00edch kh\u00e1c.<\/p>\n

Lu\u1ed3ng l\u00e0 lo\u00e0i c\u00e2y b\u1ea3n \u0111\u1ecba \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng r\u1ed9ng r\u00e3i \u1edf c\u00e1c t\u1ec9nh Thanh Ho\u00e1, Ngh\u1ec7 An v\u00e0 \u0111ang \u0111\u01b0\u1ee3c g\u00e2y tr\u1ed3ng \u1edf v\u00f9ng nguy\u00ean li\u1ec7u gi\u1ea5y V\u0129nh Ph\u00fac c\u00f9ng c\u00e1c t\u1ec9nh kh\u00e1c.<\/p>\n

C\u00e2y lu\u1ed3ng kh\u00f4ng c\u00f3 h\u1ea1t, n\u1ebfu c\u00f3 h\u1ea1t th\u00ec c\u0169ng n\u1ea3y m\u1ea7m r\u1ea5t k\u00e9m (Ph\u1ea1m V\u0103n T\u00edch, 1964). Khi ra hoa th\u00ec c\u1ea3 b\u1ee5i lu\u1ed3ng c\u0169ng s\u1ebd b\u1ecb ch\u1ebft. V\u00ec v\u1eady, vi\u1ec7c nh\u00e2n gi\u1ed1ng lu\u1ed3ng ch\u1ee7 y\u1ebfu ph\u1ea3i th\u1ef1c hi\u1ec7n b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng.<\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng ph\u1ed5 bi\u1ebfn trong nh\u00e2n d\u00e2n l\u00e0 d\u00f9ng c\u00e2y c\u1ea3 g\u1ed1c, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y cho h\u1ec7 s\u1ed1 nh\u00e2n gi\u1ed1ng r\u1ea5t th\u1ea5p. Vi\u1ec7c t\u00ecm ph\u01b0\u01a1ng ph\u00e1p nh\u00e2n gi\u1ed1ng \u0111\u01a1n gi\u1ea3n v\u1eeba t\u1eadn d\u1ee5ng t\u1ed1i \u0111a s\u1ed1 c\u00e0nh c\u00f3 tr\u00ean th\u00e2n, v\u1eeba s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c c\u00e2y gi\u1ed1ng \u1edf c\u00e1c l\u1ee9a tu\u1ed5i l\u00e0 m\u1ed9t y\u00eau c\u1ea7u c\u1ea5p thi\u1ebft \u0111\u1ec3 ph\u00e1t tri\u1ec3n gi\u1ed1ng v\u00e0o s\u1ea3n xu\u1ea5t.<\/p>\n

I. V\u1eadt li\u1ec7u v\u00e0 ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u<\/p>\n

V\u1eadt li\u1ec7u nghi\u00ean c\u1ee9u l\u00e0 c\u00e0nh lu\u1ed3ng c\u00f3 s\u1ed1 th\u00e1ng tu\u1ed5i kh\u00e1c nhau l\u1ea5y t\u1eeb c\u00e2y lu\u1ed3ng \u0111\u00e3 ra l\u00e1 \u0111\u1ea7y \u0111\u1ee7 (d\u01b0\u1edbi 1 n\u0103m tu\u1ed5i). C\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn (kho\u1ea3ng 1000 c\u00e2y hom). Th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh t\u1ea1i Trung t\u00e2m NCTN L\u00e2m sinh C\u1ea7u Hai (V\u0129nh Ph\u00fac).<\/p>\n

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

1. T\u1ef7 l\u1ec7 c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh tr\u00ean c\u00e2y<\/strong><\/p>\n

C\u00e1c nghi\u00ean c\u1ee9u tr\u01b0\u1edbc \u0111\u00e2y cho th\u1ea5y c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh \u1edf ph\u1ea7n g\u1ed1c th\u00ec r\u1ea5t d\u1ec5 ra r\u1ec5, c\u00e0nh kh\u00f4ng mang r\u1ec5 kh\u00ed sinh th\u00ec d\u00f9 x\u1eed l\u00fd c\u00e1c ch\u1ea5t k\u00edch th\u00edch c\u0169ng r\u1ea5t kh\u00f3 ra r\u1ec5, v\u00ec v\u1eady x\u00e1c \u0111\u1ecbnh t\u1ef7 l\u1ec7 c\u00e0nh mang r\u1ec5 kh\u00ed sinh l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. \u0110i\u1ec1u tra, kh\u1ea3o s\u00e1t 10 c\u00e2y (b\u1ea3ng 1) cho th\u1ea5y m\u1ed7i c\u00e2y ch\u1ec9 c\u00f3 2 \u2013 4 c\u00e0nh mang r\u1ec5 kh\u00ed sinh, th\u1eadm ch\u00ed c\u00f3 tr\u01b0\u1eddng h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c c\u00e0nh tr\u00ean c\u00e2y \u0111\u1ec1u kh\u00f4ng c\u00f3 r\u1ec5 kh\u00ed sinh. T\u1ef7 l\u1ec7 c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh tr\u00ean c\u00e2y trung b\u00ecnh ch\u1ec9 \u0111\u1ea1t 11,6%.<\/p>\n

B\u1ea3ng 1. S\u1ed1 c\u00e0nh r\u1ec5 kh\u00ed sinh tr\u00ean c\u00e2y lu\u1ed3ng<\/em><\/strong><\/p>\n\n\n\n\n\n
STT<\/td>\nT\u1ed5ng s\u1ed1 c\u00e0nh<\/td>\nC\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh<\/td>\nT\u1ef7 l\u1ec7 c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh<\/td>\n<\/tr>\n
1<\/p>\n

2<\/p>\n

3<\/p>\n

4<\/p>\n

5<\/p>\n

6<\/p>\n

7<\/p>\n

8<\/p>\n

9<\/p>\n

10<\/td>\n

20<\/p>\n

17<\/p>\n

14<\/p>\n

35<\/p>\n

25<\/p>\n

29<\/p>\n

32<\/p>\n

24<\/p>\n

18<\/p>\n

27<\/td>\n

4<\/p>\n

2<\/p>\n

0<\/p>\n

3<\/p>\n

4<\/p>\n

3<\/p>\n

3<\/p>\n

2<\/p>\n

4<\/p>\n

3<\/td>\n

20,0<\/p>\n

11,8<\/p>\n

0<\/p>\n

8,5<\/p>\n

16,0<\/p>\n

10,3<\/p>\n

9,4<\/p>\n

7,4<\/p>\n

22,2<\/p>\n

11,1<\/td>\n<\/tr>\n

Trung b\u00ecnh<\/td>\n2,8<\/td>\n11,6<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nh\u01b0 v\u1eady, d\u00f9ng c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh \u0111\u1ec3 nh\u00e2n gi\u1ed1ng th\u00ec m\u1eb7c d\u00f9 t\u1ef7 l\u1ec7 ra r\u1ec5 r\u1ea5t cao, song h\u1ec7 s\u1ed1 nh\u00e2n gi\u1ed1ng v\u1eabn th\u1ea5p.<\/p>\n

2. <\/strong>\u1ea3nh<\/strong>h\u01b0\u1edfng c\u1ee7a tu\u1ed5i c\u00e0nh \u0111\u1ebfn t\u1ef7 l\u1ec7 ra r\u1ec5<\/strong><\/p>\n

Th\u00ed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c ti\u1ebfn h\u00e0nh theo ph\u01b0\u01a1ng ph\u00e1p d\u00f9ng \u0111o\u1ea1n th\u00e2n c\u00f3 c\u00e0nh kh\u00ed sinh v\u1ea1t nh\u1ecdn, \u0111\u00f3ng ch\u1eb7t v\u00e0o \u0111\u1ea5t. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c nh\u00e2n d\u00e2n s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u1ed3ng lu\u1ed3ng v\u00e0 cho t\u1ef7 l\u1ec7 s\u1ed1ng cao. K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m cho th\u1ea5y:<\/p>\n

– \u0110o\u1ea1n th\u00e2n c\u00f3 c\u00e0nh 2 \u2013 4 th\u00e1ng tu\u1ed5i: Trong 700 \u0111o\u1ea1n c\u00f3 23 \u0111o\u1ea1n ra r\u1ec5, t\u1ef7 l\u1ec7 ra r\u1ec5 l\u00e0 3,3%.<\/p>\n

– \u0110o\u1ea1n th\u00e2n c\u00f3 c\u00e0nh 6 \u2013 8 th\u00e1ng tu\u1ed5i: Trong 1.196 \u0111o\u1ea1n c\u00f3 727 \u0111o\u1ea1n ra r\u1ec5, t\u1ef7 l\u1ec7 ra r\u1ec5 l\u00e0 60,8%.<\/p>\n

Nh\u01b0 v\u1eady, \u0111o\u1ea1n th\u00e2n c\u00f3 c\u00e0nh 6 \u2013 8 th\u00e1ng tu\u1ed5i l\u00e0 th\u00edch h\u1ee3p nh\u1ea5t \u0111\u1ec3 nh\u00e2n gi\u1ed1ng sinh d\u01b0\u1ee1ng. Tuy nhi\u00ean, trong th\u1ef1c t\u1ebf, th\u00e0nh c\u00f4ng c\u1ee7a gi\u00e2m hom kh\u00f4ng nh\u1eefng ph\u1ee5 thu\u1ed9c v\u00e0o tu\u1ed5i c\u00e0nh m\u00e0 c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft, song gi\u00e2m c\u00e0nh t\u1eeb th\u00e1ng 4 \u0111\u1ebfn th\u00e1ng 8 th\u01b0\u1eddng c\u00f3 t\u1ef7 l\u1ec7 ra r\u1ec5 cao nh\u1ea5t.<\/p>\n

3. Nh\u00e2n gi\u1ed1ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p chi\u1ebft c\u00e0nh<\/strong><\/p>\n

Ph\u01b0\u01a1ng ph\u00e1p chi\u1ebft c\u00e0nh ngh\u0129a l\u00e0 v\u1eabn \u0111\u1ec3 c\u00e0nh \u1edf tr\u00ean c\u00e2y khi k\u00edch th\u00edch ra r\u1ec5.<\/p>\n

Ti\u1ebfn h\u00e0nh c\u1eaft \u0111\u1ee9t 2\/ 3 ti\u1ebft di\u1ec7n c\u1ee7a c\u00e0nh, ch\u1ec9 \u0111\u1ec3 1\/ 3 ti\u1ebft di\u1ec7n c\u00e0nh ch\u00ednh tr\u00ean c\u00e2y, \u0111\u1ed3ng th\u1eddi c\u1eaft b\u1edbt ph\u1ea7n tr\u00ean c\u1ee7a c\u00e0nh, m\u1ed7i c\u00e0nh c\u0169ng ch\u1ec9 \u0111\u1ec3 4 \u0111\u1ed1t s\u00e1t th\u00e2n c\u00e2y.<\/p>\n

Vi\u1ec7c chi\u1ebft c\u00e0nh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch b\u00f3 h\u1ed7n h\u1ee3p b\u00f9n + r\u01a1m v\u00e0o ph\u1ea7n g\u1ed1c c\u00e0nh (ph\u1ea7n s\u00e1t th\u00e2n), sau 25 ng\u00e0y th\u00ec ki\u1ec3m tra ra r\u1ec5.<\/p>\n

C\u00e1c c\u00f4ng th\u1ee9c th\u00ed nghi\u1ec7m ch\u00ednh l\u00e0:<\/p>\n

a.Ch\u1ec9 chi\u1ebft nh\u1eefng c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh, c\u00e0nh chi\u1ebft \u0111\u01b0\u1ee3c b\u1ecdc b\u1eb1ng h\u1ed7n h\u1ee3p b\u00f9n + r\u01a1m.<\/p>\n

b.Chi\u1ebft t\u1ea5t c\u1ea3 c\u00e1c c\u00e0nh (c\u00f3 v\u00e0 kh\u00f4ng c\u00f3 r\u1ec5 kh\u00ed sinh), c\u00e0nh chi\u1ebft \u0111\u01b0\u1ee3c b\u1ecdc b\u1eb1ng h\u1ed7n h\u1ee3p b\u00f9n r\u01a1m.<\/p>\n

c.Chi\u1ebft t\u1ea5t c\u1ea3 c\u00e0nh, (c\u00f3 v\u00e0 kh\u00f4ng c\u00f3 r\u1ec5 kh\u00ed sinh), c\u00e0nh chi\u1ebft \u0111\u01b0\u1ee3c b\u1ecdc b\u1eb1ng h\u1ed7n h\u1ee3p b\u00f9n r\u01a1m sau \u0111\u00f3 bao nilon ph\u00eda ngo\u00e0i \u0111\u1ec3 gi\u1eef \u1ea9m.<\/p>\n

K\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m (b\u1ea3ng 2)<\/p>\n

B\u1ea3ng 2. T\u1ef7 l\u1ec7 ra r\u1ec5 \u1edf c\u00e1c c\u00f4ng th\u1ee9c chi\u1ebft c\u00e0nh c\u1ee7a c\u00e2y lu\u1ed3ng t\u1ea1i C\u1ea7u Hai<\/em><\/strong><\/p>\n\n\n\n\n
C\u00f4ng th\u1ee9c<\/td>\nS\u1ed1 c\u00e0nh chi\u1ebft<\/td>\nS\u1ed1 c\u00e0nh ra r\u1ec5<\/td>\nT\u1ef7 l\u1ec7 ra r\u1ec5<\/td>\n<\/tr>\n
a.Ch\u1ec9 chi\u1ebft nh\u1eefng c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh, c\u00e0nh chi\u1ebft \u0111\u01b0\u1ee3c b\u1ecdc b\u1eb1ng h\u1ed7n h\u1ee3p b\u00f9n + r\u01a1m.<\/p>\n

b.Chi\u1ebft t\u1ea5t c\u1ea3 c\u00e1c c\u00e0nh (c\u00f3 v\u00e0 kh\u00f4ng c\u00f3 r\u1ec5 kh\u00ed sinh), c\u00e0nh chi\u1ebft \u0111\u01b0\u1ee3c b\u1ecdc b\u1eb1ng h\u1ed7n h\u1ee3p b\u00f9n r\u01a1m.<\/p>\n

c.Chi\u1ebft t\u1ea5t c\u1ea3 c\u00e0nh, (c\u00f3 v\u00e0 kh\u00f4ng c\u00f3 r\u1ec5 kh\u00ed sinh), c\u00e0nh chi\u1ebft \u0111\u01b0\u1ee3c b\u1ecdc b\u1eb1ng h\u1ed7n h\u1ee3p b\u00f9n r\u01a1m sau \u0111\u00f3 bao nilon ph\u00eda ngo\u00e0i \u0111\u1ec3 gi\u1eef \u1ea9m.<\/td>\n

1.700<\/p>\n

7.000<\/p>\n

528<\/td>\n

1615<\/p>\n

490<\/p>\n

515<\/td>\n

95,0<\/p>\n

7,0<\/p>\n

97,5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

– C\u00f4ng th\u1ee9c a c\u00f3 t\u1ef7 l\u1ec7 ra r\u1ec5 95,0%. Tuy nhi\u00ean, do ch\u1ec9 d\u00f9ng c\u00e0nh c\u00f3 r\u1ec5 kh\u00ed sinh n\u00ean h\u1ec7 s\u1ed1 nh\u00e2n gi\u1ed1ng th\u1ea5p v\u00e0 ch\u1ec9 th\u00edch h\u1ee3p cho vi\u1ec7c l\u1ea5y gi\u1ed1ng t\u1eeb r\u1eebng s\u1ea3n xu\u1ea5t, kh\u00f4ng l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e2y m\u1eb9.<\/p>\n

– C\u00f4ng th\u1ee9c b t\u1ef7 l\u1ec7 ra r\u1ec5 ch\u1ec9 \u0111\u1ea1t 7,0%.<\/p>\n

– C\u00f4ng th\u1ee9c c do gi\u1eef \u0111\u01b0\u1ee3c \u1ea9m trong th\u1eddi gian d\u00e0i n\u00ean t\u1ea1o \u0111i\u1ec1u ki\u1ec7n ra r\u1ec5 cho t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i c\u00e0nh, t\u1ef7 l\u1ec7 ra r\u1ec5 \u0111\u1ea1t 97,5%.<\/p>\n

D\u00f9ng ph\u01b0\u01a1ng ph\u00e1p chi\u1ebft c\u00e0nh c\u00f2n c\u00f3 \u01b0u \u0111i\u1ec3m l\u00e0 c\u00f3 th\u1ec3 ti\u1ebfn h\u00e0nh chi\u1ebft quanh n\u0103m, song t\u1ed1t nh\u1ea5t v\u1eabn l\u00e0 t\u1eeb th\u00e1ng 1 \u2013 3 v\u00e0 t\u1eeb th\u00e1ng 7 \u2013 9.<\/p>\n

Trong tr\u01b0\u1eddng h\u1ee3p c\u00e0nh gi\u00e0 h\u01a1n 10 th\u00e1ng tu\u1ed5i th\u00ec l\u00e0m tr\u1ebb ho\u00e1 b\u1eb1ng c\u00e1ch ch\u1eb7t b\u1ecf \u0111o\u1ea1n c\u00e0nh gi\u00e0 v\u00e0o s\u00e1t b\u1ea7u g\u1ed1c c\u1ee7a c\u00e0nh ch\u00ednh \u0111\u1ec3 c\u00f3 th\u1ec3 m\u1ecdc c\u00e0nh th\u1ee9 sinh, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh chi\u1ebft cho c\u00e0nh th\u1ee9 sinh \u0111\u00e3 \u0111\u01b0\u1ee3c tr\u1ebb ho\u00e1 nh\u01b0 nh\u1eefng c\u00e0nh ch\u00ednh c\u00f2n tr\u1ebb.<\/p>\n

4. Ch\u0103m s\u00f3c trong v\u00e0 sau khi chi\u1ebft<\/strong><\/p>\n

\u0110\u1ec3 vi\u1ec7c chi\u1ebft c\u00e0nh thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 cao nh\u1ea5t c\u1ea7n th\u1ef1c hi\u1ec7n t\u1ed1t k\u1ef9 thu\u1eadt chi\u1ebft v\u00e0 ch\u0103m s\u00f3c c\u00e2y sau khi chi\u1ebft.<\/p>\n

– T\u1ef7 l\u1ec7 b\u00f9n v\u00e0 r\u01a1m \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 b\u00f3 c\u00e0nh chi\u1ebft l\u00e0 2 ph\u1ea7n b\u00f9n, 1 ph\u1ea7n r\u01a1m (\u0111\u00e3 b\u0103m nh\u1ecf).<\/p>\n

– L\u01b0\u1ee3ng h\u1ed7n h\u1ee3p b\u00f9n + r\u01a1m cho m\u1ed7i c\u00e0nh chi\u1ebft l\u00e0 250 \u2013 300 g\/ c\u00e0nh.<\/p>\n

– H\u1ed7n h\u1ee3p b\u00f9n + r\u01a1m \u0111\u01b0\u1ee3c b\u00f3 quanh ph\u1ea7n g\u1ed1c c\u00e0nh, c\u00f3 \u0111\u1ed9 \u1ea9m kh\u00f4ng qu\u00e1 \u01b0\u1edbt.<\/p>\n

– D\u00f9ng nilon t\u1ea5m c\u00f3 k\u00edch th\u01b0\u1edbc 60cm x 12cm (ho\u1eb7c 14cm) b\u1ecdc b\u1ea7u \u0111\u1ea5t v\u00e0 bu\u1ed9c 2 \u0111\u1ea7u.<\/p>\n

Sau khi chi\u1ebft 20 \u2013 30 ng\u00e0y c\u00e0nh chi\u1ebft \u0111\u00e3 ra r\u1ec5, ti\u1ebfn h\u00e0nh c\u1eaft c\u00e0nh c\u00f3 c\u1ea3 b\u1ea7u \u0111\u1ea5t, sau \u0111\u00f3 \u01b0\u01a1m th\u00eam 4 \u2013 6 th\u00e1ng m\u1edbi \u0111\u01b0a \u0111i tr\u1ed3ng.<\/p>\n

Lu\u1ed1ng \u01b0\u01a1m d\u00e0i 10m, r\u1ed9ng 1m, cao 15 \u2013 20cm. B\u00f3n ph\u00e2n chu\u1ed3ng hoai (5kg\/ m2<\/sup>) ho\u1eb7c NPK (0,5kg\/ m2<\/sup>).<\/p>\n

C\u00e0nh \u0111\u00e3 ra r\u1ec5, b\u00f3c v\u1ecf nilon, gi\u00e2m t\u1ea1m theo kho\u1ea3ng c\u00e1ch 25 x 40cm, \u0111\u1ec3 nghi\u00eang 600<\/sup>, ch\u00f4n s\u00e2u 15 \u2013 20cm. C\u00e2y chi\u1ebft \u0111\u01b0\u1ee3c ch\u0103m s\u00f3c theo k\u1ef9 thu\u1eadt v\u01b0\u1eddn \u01b0\u01a1m th\u00f4ng th\u01b0\u1eddng. Khi c\u00e2y chi\u1ebft c\u00f3 m\u0103ng \u0111\u00e3 ph\u00e1t tri\u1ec3n \u0111\u1ee7 l\u00e1 l\u00e0 \u0111\u1ea1t ti\u00eau chu\u1ea9n \u0111em tr\u1ed3ng.<\/p>\n

III. K\u1ebft Lu\u1eadn<\/p>\n

1. Lu\u1ed3ng l\u00e0 m\u1ed9t lo\u00e0i c\u00e2y c\u00f3 th\u1ec3 nh\u00e2n gi\u1ed1ng b\u1eb1ng c\u00e0nh. Trong m\u1ed9t c\u00e2y m\u1eb9 ch\u1ec9 c\u00f3 11,6% s\u1ed1 c\u00e0nh mang r\u1ec5 kh\u00ed sinh.<\/p>\n

2. Gi\u00e2m b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111\u00f3ng \u0111o\u1ea1n th\u00e2n c\u00f3 c\u00e0nh mang r\u1ec5 kh\u00ed sinh (c\u00e0nh 6 \u2013 8 th\u00e1ng tu\u1ed5i) v\u00e0o \u0111\u1ea5t c\u00f3 th\u1ec3 cho t\u1ef7 l\u1ec7 ra r\u1ec5 h\u01a1n 90%.<\/p>\n

3. Chi\u1ebft c\u00e0nh c\u00f3 mang r\u1ec5 kh\u00ed sinh \u0111\u1ea1t t\u1ef7 l\u1ec7 ra r\u1ec5 h\u01a1n 90%. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u00edch h\u1ee3p \u0111\u1ec3 t\u1eadn d\u1ee5ng c\u00e1c c\u00e0nh ph\u00eda d\u01b0\u1edbi c\u00e2y \u0111\u1ec3 l\u00e0m gi\u1ed1ng.<\/p>\n

4. Ph\u01b0\u01a1ng ph\u00e1p b\u1ecdc b\u1ea7u \u0111\u1ea5t th\u00f4ng th\u01b0\u1eddng (kh\u00f4ng bao nilon) ch\u1ec9 c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 chi\u1ebft c\u00e0nh mang r\u1ec5 kh\u00ed sinh. D\u00f9ng nilon bao b\u1ecdc b\u1ea7u \u0111\u1ea5t + b\u00f9n c\u00f3 th\u1ec3 chi\u1ebft cho c\u00e0nh mang r\u1ec5 kh\u00ed sinh v\u00e0 c\u1ea3 cho c\u00e0nh kh\u00f4ng mang r\u1ec5 kh\u00ed sinh (t\u1ef7 l\u1ec7 ra r\u1ec5 97%).<\/p>\n

5. Khi c\u00e2y chi\u1ebft \u0111\u00e3 ra r\u1ec5 ph\u1ea3i g\u00e2y \u01b0\u01a1m v\u00e0 ch\u0103m s\u00f3c trong 4 \u2013 6 th\u00e1ng m\u1edbi \u0111\u1ee7 ti\u00eau chu\u1ea9n \u0111em tr\u1ed3ng.<\/p>\n

Summary:<\/em><\/strong>Dendrocalamus membranaceus <\/em>is a species capable of being propagated by branch layering. In a mother plant only 11% of the branches have aerial roots.<\/p>\n

Inserting the culm sections with a branch (6 – 8 month old) having aerial roots into the ground will obtain the rooting in over 90% of these branches.<\/p>\n

Layering of branches with aerial roots will obtain rooting in over 90% of the branches. This is a suitable method to make full use of the branches lower in the culm for planting stock.<\/p>\n

The ordinary method of using a ball of earth (without nylon sheet wrapping) can be used only for branches having no aerial roots. method of using nylon sheet to wrap the ball of earth + mud can be used for layering both types branch, with and without aerial roots.<\/p>\n

When the layering branch has produced roots, its further raising and tending in 4 – 6 months is needed to meet the planting stock standard.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h1>\n

1. Ho\u00e0ng V\u0129nh T\u01b0\u1eddng, 1977. Nghi\u00ean c\u1ee9u t\u00e1c d\u1ee5ng c\u1ee7a m\u1ed9t s\u1ed1 ch\u1ea5t k\u00edch th\u00edch sinh tr\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c nh\u00e2n gi\u1ed1ng lu\u1ed3ng b\u1eb1ng c\u00e0nh.<\/p>\n

2. Nguy\u1ec5n Th\u1ecb Phi Anh, 1967. K\u1ef9 thu\u1eadt tr\u1ed3ng Tre di\u1ec5n \u1edf C\u1ea7u Hai \u2013 B\u00e1o c\u00e1o khoa h\u1ecdc.<\/p>\n

3. Ph\u1ea1m V\u0103n T\u00edch, 1964. C\u00e2y v\u1ea7u.<\/p>\n","protected":false},"excerpt":{"rendered":"

Lu\u1ed3ng (Dendrocalamus membranaceus) là m\u1ed9t loài cây thu\u1ed9c h\u1ecd Bambusacaea m\u1ecdc theo c\u1ee5m, sinh tr\u01b0\u1edfng nhanh. Sau m\u1ed9t ngày \u0111êm m\u0103ng lu\u1ed3ng có th\u1ec3 cao 0,6 — 0,7m, sau 45 ngày cây lu\u1ed3ng \u0111ã \u0111\u1ea1t chi\u1ec1u cao 18 – 20m v\u1edbi \u0111\u01b0\u1eddng kính ngang ng\u1ef1c 10 — 12cm, n\u1eb7ng 35 — 40kg. Sau 2 n\u0103m có th\u1ec3 khai thác làm nguyên li\u1ec7u gi\u1ea5y ho\u1eb7c làm c\u1ed9t nhà và s\u1eed d\u1ee5ng cho các m\u1ee5c \u0111ích khác. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15,18],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8601"}],"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=8601"}],"version-history":[{"count":2,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8601\/revisions"}],"predecessor-version":[{"id":19300,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/posts\/8601\/revisions\/19300"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/media?parent=8601"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/categories?post=8601"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/vn\/wp-json\/wp\/v2\/tags?post=8601"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}