摘要
对河北省坝上高原农田土壤风蚀及其三个主要影响因素(土壤不可蚀性颗粒、土壤微地形和作物残余物)的野外观测和研究结果表明,在棵露平坦的秋翻地,土壤风蚀量随不可蚀性颗粒含量的增加而减少;春翻地土垄高度(犁沟深度)和留茬地作物残余物盖度的增加使土壤风蚀量大大减少,而且土壤微地形作物残余物和土壤不可蚀性颗粒的综合影响,对降低土壤风蚀量更为有效。据此认为,在防护林体系很不完善的坝上高原,只要实行合理的耕作方式,即秋季留茬、增加作物残余物,春季深翻,增高土垄(或加深犁沟深度)可有效地控制土壤风蚀、减轻风蚀危害。
Soil erosion of farmland on Bashang highland in Hebei province and its main affecting factors such as uneredible soil particles.soil micromorphology and crop stubble were studied.THestudied results showed that soil deflation rate in flat autumn- ploughed farmland decreases withincreasing unerodible particle amount, whereas in the spring- ploughed farmland soil deflation ratedecreases with ridge height (or furrow depth ) and crop stubble coverage. On the Bashang Highland,where shelterbelt is far from perfect,rational tillage ways.autumn stubble mulch and spring deepplough could effectively control wind erosion and alleviate its damages to crops.
出处
《中国沙漠》
CSCD
北大核心
1994年第4期92-97,共6页
Journal of Desert Research
关键词
坝上高原
土壤
风蚀
不可蚀性颗粒
耕作方式
Soil wind erosion Soil micromorphology Stubble mulch Bashang Highland