彰武县保护性耕作防治土壤风蚀效果监测

在彰武县中部和北部土壤沙化程度不同的5个乡镇建立农田土壤风蚀试验区,利用自制的被动型沙尘采集器测定不同耕作方式下农田土壤风蚀情况。结果表明:在风蚀过程中,不同耕作方式下土壤输沙量随着高度的增加呈下降趋势,变化规律符合幂函数关系。风蚀土壤颗粒粒度组成随高度增加所含的沙粒粒级越来越小。输沙量最大的耕作方式是花生茬深翻,其损失的主要是土壤中的粗沙粒和细沙粒,运动形式主要为跃移运动。秋翻地、秋浅旋灭茬、春浅旋灭茬、旋耕覆盖损失主要是土壤中的细沙粒和粗粉粒,其运动形式主要为悬浮运动。

Supervise on the Effect of Preventing Soil Wind Erosion under Conservation Tillage in Zhangwu County

A field experiment was conducted on farmland in 5 soil desertification degree villages in central and north Zhangwu county to measure the farmland soil loss by wind erosion under different tillage patterns.A homemade sandy sampler was used to collect the soil particles during the soil erosion process.The relationship of the soil mass and the height were showed that the soil mass was decreased with height increasing which was fitted as a power function of different tillage patterns during wind erosion.The relationship of the height and the composition of the wind erosion soil particle rank was the higher and the smaller. The soil mass in the samplers were different because of different tillage patterns.The maximal soil mass was the tillage pattern of deep crossing on the peanuts stubble which mainly was thick sand and silver sand,which moving as spring moving patterns.While the other tillage patterns were silver sand and thick silt,which moving as suspending patterns.