中国水土保持科学2011，Vol.9Issue(3)：1-5,5.
保护性耕作对土壤风蚀的影响
Impact of conservation tillage on soil wind erosion
摘要
Abstract
Conservation tillage could reduce soil wind erosion effectively on farmland. An experiment of soil wind erosion on farmland in northern Loess Plateau was designed with wind tunnel tests under different conservation treatments including straw mulch, stubble and ridge tillage. The results indicated that straw mulch and stubble could reduce the soil wind erosion rate, and the soil wind erosion rate under straw mulch with 4 210 kg/hm2 was decreased by 62.8％ compared with CK( no conservation treatment),which was less than that under other conservation tillage. The ridge tillage which was perpendicular to the wind could reduce soil wind erosion rate in low wind velocity, the direction of ridge also affected soil wind erosion, and the soil wind erosion rate under ridge tillage with the same direction as the wind was more than others. With increasing straw mulch and height of stubble, the soil wind erosion rate decreased in the same velocity. The soil wind erosion rate had a significant power function to wind velocity under conservation tillage treatments. In the height of 0 -60 cm, the total volume of sediment discharge under straw mulch was the least, while the largest under ridge tillage. The most of sand concentrate in the height of 45 -60 cm under ridge tillage that direction was perpendicular to the wind, and concentrate in the height of 0 - 15 cm under other treatments. The sediment discharge percent in the height of 0 - 15 cm increased with increasing wind speed. The sediment discharge percent decreased with decreasing height of stubble and with the increasing amount of straw mulching. It is suggested that the straw mulching 20 cm and both of them should be suitable for preventing soil wind erosion.关键词
保护性耕作/土壤风蚀/风洞模拟Key words
conservation tillage/ soil wind erosion/ wind tunnel simulation引用本文复制引用
范清成,王飞,穆兴民,刘振东,李锐..保护性耕作对土壤风蚀的影响[J].中国水土保持科学,2011,9(3):1-5,5.基金项目
国家科技支撑计划项目"黄土高原水土流失综合治理工程关键支撑技术研究"(2006BAD09B00) （2006BAD09B00）
欧盟框架计划项目"荒漠化防治与修复"(FP6,DESIRE,037046) （FP6,DESIRE,037046）
