摘要
坡耕地所造成的土壤侵蚀,已成为全世界共同关注的问题。黄土高原地区,沟壑纵横,地形破碎,沟深坡陡,是世界上水土流失最强烈的地区。坡耕地的水土流失不仅是造成河流水库淤积的一个重要原因,更重要的是每年要丧失大量的肥沃表土,导致农业减产和土壤退化。一遇暴雨,人民的生命财产将遭受到巨大的威胁。黄土高原地区每年水力侵蚀土层深度达0.2—2cm,每1ha 损失表土120t 左右。
The Loess plateau region fames the most intensive water and soil erosion in the world.Thewater and soil erosion in cultivated sloping land leads to the reduction of agricultural yieldsand deterioration of soil.This paper introduces the water and soil conservating cultivationmethod and its role in controlling water and soil erosion.Scientific predictions are made forthe developing trends of this method in managing cultivated sloping land.
出处
《生态学杂志》
CAS
CSCD
北大核心
1990年第3期9-11,共3页
Chinese Journal of Ecology
关键词
水土保持
耕作法
坡耕地
黄土高原
water and soil conservation
cultivation method
cultivated sloping land
the Loess Plateau
