河北坝上农牧交错区不同下垫面土壤风蚀特征研究

Study on Soil Wind Erosion of Different Underlying in Ecotone Between Agriculture and Animal Husbandry in Bashang of Hebei

针对河北坝上农牧交错区不同下垫面土壤,采用“陷阱捕捉”与埋设风蚀盘的方法进行了风蚀特征的野外监测。监测表明坝上不同下垫面类型的风蚀量存在显著差异。以耕翻地为对照,在滩地上莜麦留茬地的风蚀量减少了9.1%,而玉米留茬地、免耕菜地的风蚀量则比对照分别增加了123.71%和229.07%。在梁地上莜麦留茬地、草地、林地的风蚀量分别比对照减少14.76%、68.67%和82.23%。在滩地与梁地两种地貌上,莜麦留茬地与耕翻地的风蚀量差异都不显著。地表的粗糙度和植被盖度是影响土壤风蚀量的重要因素。

Aimed at the different underlying surfaces in ecotone between agriculture and animal husbandry in bashing of Hebei province, the wind erosion situation is observed in field by ＂trap entrapped＂ method. The results showed that the erosion is remarkably different in different underlying surfaces. In bottondand, the erosion of stubble land of naked oats is 9.1% less than CK （plough land）, while the erosion of stubble land of corn and no-tillage of vegetable is 123.71% and 229.07% more than CK. In girder land, the wind erosion of the stubble land of naked oats, grassland and woodland is separately 14.76%, 68.67% and 82.23% more than CK （plough land）. The wind erosion of stubble land of naked oats is not marked with the plough land in both bottondand and girder land, the degree of roughness and bestrow are important factors to the soil erosion.