Nghiên cứu phân chia lập địa phục vụ trồng rừng để cung cấp nguyên liệu làm ván dăm tại huyện Đồng Hỷ - tỉnh Thái Nguyên

KHOA HOC CONG NGHE

IMGHIEIM CLJU PHAIM CHIA LAP D|A PHUC V U TROIMG

RUIMG OE CUIMG CAP IMGUYEIM LIEU LAIVI VAIM DAIU TA I

HUYEIM DOIMG HY - TilMH THA I IMGUYEIM

TrIn Cdng Quan\ Dang Kim Vui^

TOM TAT

Ket qua phan chia lap dia la dinh huong cho viec su dung dat va tim giai phap nham nang cao nang suat,

hieu qua rung trdng nguyen lieu. Nghien ciiu dieu tra tren 120 d tieu chuan khac nhau trong khu vyc

nghien cuu, da phan chia dupe 68 dang lap dia khac nhau va ghep thanh 4 nhdm lap dia vdi cac yeu td ddng

nhat. Nhdm lap dia I dang co rimg moi trong Keo lai, Keo tai tuong va Bach dan Uro; nhdm lap dia II la dat

trdng nhung phii hpp vdi cac loai cay Keo lai, Keo tai tuong va Bach dan Uro; nhdm lap dia 111 phan bd a

sudn ddi, dang cd riing trdng tu 3 - 5 nam tudi, can nudi duong, gdm Keo lai, Keo tai tuong va Bach dan Uro;

nhdm lap dia fV phan bd d dinh, phan ldn dang lap dia cd rung trdng keo va bach dan, Hudng sir dung lap

dia ddi vdi cac nhdm lap dja tren tap trung trong Keo lai va Bach dan Uro thi rung trdng nen cham sdc 5

nam thay cho trudc day chi cham sdc 3 nam, Trdng rung can lya chon muc dp thich hpp cua cay trdng vdi

cac nhdm va dang lap dia,

Tir khda: hip dia, dang lap dia, yeu td, ivng trong nguyen lieu vam dam.

LDATVANDE

Phan chia lap dia luon duge dinh gil II can thief

vl quan trgng trong cdng tic trdng rimg. Tfr nhung

nam 1970, d c chuyen gia lam nghiep Due da sir

dung cdng tac dieu fra lap dia phye vu cho quy hoach

trdng rimg Thdng nhya d tinh Quang Ninh. Nam

1971, nganh Lam nghiep Viet Nam da ban hanh quy

trinh ve dieu tra lap dia cap I. Tuy nhien, viec van

dyng quy trinh tren cdn han che, chu yeu chi md tl

cac dieu kien lap dia khi thief ke trdng rang. Viec

phan chia nhdm, dang lap dia dat ddi nui giup lya

chpn loli cay, d c bien phap ky thuat phu hgii de

canh tie cd hieu qua vdi tung dang lap dia d khu vyc

cd y nghia rlt quan trgng trong viec su dyng daf.

Cdng ty VIn dam Thai Nguyen cd tdng dien tich

quy hoach cho trdng rung nguyen lieu d Thli

Nguyen II 6000 ha, trong dd d huyen Ddng Hy 4400

ha, huyen Phu Binh 1600 ha. Trong pham vi de tai

nay chi tap trung nghien cun tren dia ban huyen

Ddng Hy (tai 5 xa) va dudi day la ket qua nghien cun

phan chia lap dia cho trdng ning nguyen lieu van dam

tai huyen Ddng Hy - tinh Thli Nguyen.

II. MUC TIEU, NO! DUI\IG VA PHUONG PHAP NGHIEN CUU

1. Muc tieu

' Trudng Dai hpc Ndng Lain - DH Thai Nguyen.

- PGS, TS. Trudng Dai lipc Nong Lam - DH Thai Ngu>'en

Tren c a sd phan chia dugc cac dang lap dia

trong khu vtrc nghien ciiu se de xult dinh hudng sir

dyng hgp ly d c dang lap dia de nang cao hieu qua

trdng rang nguyen lieu vin dam.

2. Ndi dung

Xlc dinh vl phan tich d c yeu td d u fhlnh lap

dia d khu vyc nghien ctru.

Tdng hgp cac yeu td chu dao, tien hinh phan

chia dang lap dia, nhdm lap dia vl hudng sir dyng d c

nhdm lap dia tai huyen Ddng Hy - Thai Nguyen.

Dinh gia muc dp thich hgp cua cay trdng tren

d c dang lap dia da phan chia tai huyen Ddng Hy.

3. Phucmg phip

Thu thap d c sd lieu thir cap qua tiep can vl thua

ke nhung sd lieu cd sin d cic ca quan nhu: Bin dd

dia hinh, ban dd dat, ban dd hien trang rung, sd lieu

ve khi hau thuy van.

Lap d c tuyen didu fra d d c xa, tren d c tuyen

lap d c d tieu chuan (OTC) de tien hinh dieu tra d c

yeu fd cau thanh Icip dia va do dem cay trdng idmg

hien cd fheo d c chi tieu: Dudng kinh D, 3 vl Hvn ...

Dao phau dien dat, lay dat phan tich d c chi tieu

danh gia dinh dudng daf nhu: N, P, K, mun, pH.

Tdng hpp, xir ly sd lieu va viet bao do .

III. KET QUA VA THAG LUAN

NONG NGHIEP VA PHAT TRIEN NONG THON - SO 2 - THANG 2/2010 99