遂宁组紫色土坡耕地土壤侵蚀规律研究

Study on Soil Erosion Regularity of Sloping Farmland in Suining Group Purple Soil

通过对遂宁市水土保持试验站径流小区的定位观测试验,采用数据分析的方法,对遂宁组紫色土坡耕地土壤侵蚀规律进行了试验研究,结果表明:径流量随着降雨量的增加而增大,而侵蚀量与降雨量的相关性却不明显;坡耕地土壤侵蚀厚度、侵蚀量及养分流失量均随着坡耕地坡度的增加而变大;土壤侵蚀量和降雨量、平均雨强、浑水径流深之间的关系可用y=-30.666-1.326x1-2.343x2+23.646x3很好地描述。

Through the located observation trial in runoff plot in Suining Water and Soil Conservation Station, using the way of data analyzing, the laws of soil erosion on sloping farmland in Suining group purple soil. The results showsed: runoff is enlarged along with the increase of rainfall, and the relativity between the erosion and the rainfall is unapparent; the erosion thickness of sloping land, erosion amount and the loss amount of nutriment are all become big along with the increase of the cultivated land gradient;y=-30.666-1.326x_1-2.343x_2+23.646x_3 can describe the relation between soil erosion amount and rainfall, meant rainfall density, depth of muddy runoff well.