摘要
县内土地面积３６．４９万ｈｍ２，坡耕地面积３．４４万ｈｍ２．坡耕地粮食年产４５００－６５００ｋｇ／ｋｍ２．低产原因是土层瘠薄，缺土水肥．采取的综合治理措施有：建设农田基础设施，实行生物－工程措施，推行分带轮作三熟制等．由此粮食年产达１１０００—１２５００ｋｇ／ｈｍ２．
Yunyang County is located in the east of the Sichuan Basin (108°24'32'-109°14'51'E,30°35'06'-31°26'30'N). The papulation of the county is 120. 8×104 (in 1995). The land area is 36. 49×104hm2 and the slope land area is 3. 44×104 hm2. The Slope land is mostly distributed in hilly region,and the grain yield only is 4 500-6 500kg/hm2. The low-yield factors of slope land: 1. The capacity to preserve moisture,soil and pertility on the slope land is low. 2. The soil is bsrren, the thickness is≤ 20cm, and the soil physical property and nutrient are degenerated. 3. Soil texture is getting desertization and its structure is bad. 4. The capital installations of fsrmland are less. The measures for integrately hsrnessing the low-yield slope land are as follows: 1. to build the capital installation of fsrmland,and to chsnnel surface runoff into farmland; 2. to take engineering measure to improve slope land, deeply plough the land and apply organic ferrilizer to the slope land; 3. to plant the trees to green the waste hills and slope,protect the forest; 4. to pursue crop rotation and three crops in a year, and integral management of aproforestry. Thus the grain yield may raise to 11 000-12 500kg/hm2.
出处
《山地研究》
CSCD
1996年第4期272-276,共5页
基金
国际农业发展基金
联合国世界粮食计划署(WFP)联合投资的川东北农业综合开发项目
关键词
四川省
云阳县
坡耕地
粮食低产
综合治理
Sichuan Province, Yunyang County, slope land, grain, low-yield, integrated harnessing
