摘要
本文研究了不同作物留茬和建设农田防护林对遏制农田土壤风蚀的效应。结果表明:不同作物残茬留量对农田土壤风蚀具有一定的控制作用,但仅留茬措施不能根本性遏制农田土壤风蚀;高积沙农田的风蚀深度和土壤风蚀量均高于平沙地农田,其中>10 m高积沙农田的风蚀深度和土壤风蚀量分别为2.9 cm和289.5 t/hm2;农田防护林带内的平均风蚀深度和平均土壤风蚀量分别为0.38 cm和38.85 t/hm2,仅为林带外的18.10%和18.49%,说明在该区建立农田防风林(网)是遏制农田土壤风蚀的有效途径。
The effects of the stubble of different crops and farmland windbreak on controlling farmland soil erosion are studied. The results show： the stubble of different crops can control the farmland soil erosion in some degree, but it can not control the farmland soil erosion fundamentally. The depth and amount of soil erosion in high sandy farmland at different heights are higher than flat sandy farmland, the depth and amount of soil erosion in the high sandy farmland with height over 10 m are 2. 9 cm and 289.5 t/hm2 separately. The average depth and average amount of soil erosion inside the farmland shelterbelt are 0.38 cm and 38.85 t/hm2 respectively, which are 18.10% and 18.49% of that outside the farmland shelterbelt. It shows that to establish the farmland windbreak in this area is an effective way for controlling farmland soil erosion.
出处
《内蒙古林业科技》
2009年第1期10-13,共4页
Journal of Inner Mongolia Forestry Science and Technology
基金
国家自然科学基金项目(40561009)资助
关键词
农田
土壤风蚀
留茬
农田防护林
farmland
wind erosion
stubble
farmland shelterbelt
