红壤坡地耕作模式与水土流失监测初报

The Cultivated Model of Red Soil Sloping Fields and a Preliminary Report on the Monitoring of Soil Erosion

在 6～ 2 1°的红壤坡地上 ,采用径流小区法研究不同耕作模式和坡度下水土流失的规律。结果表明 :梯地可以减少土壤侵蚀量 70 - 80 % ;在自然状态下较为有效的植被覆盖可减少土壤侵蚀量 90 %以上 ;红壤荒草坡一经开发利用土壤侵蚀量就成倍地增加 ,第 1、2年较为严重 ,第 3年后趋于稳定 ;在无植被覆盖的情况下红壤坡地坡度每递增 1° ,对应的土壤侵蚀量增加 10 %左右。在红壤坡地采用综合治理措施 。

In this article the authors studied the law of soil erosion under different cultivated models and slopes on 6-21°red soil sloping fields with the method of runoff plot The result showed that the amount of soil erosion could be decreased by 70-80% on terrace land;under natural condition,the effective plant cover could reduce the soil erosion amount by more than 90%;Once the waste land on slopes of red soil with weeds was exploited,the soil erosion amount would be doubled and redoubled The conditions were comparatively serious for the first and second year After the third year,the soil erosion would tend to be stable Under the condition of no plant covering,when the slope of red soil sloping fields increases per degree(1°),the corresponding amount of soil erosion will increase by about 10% Applying the synthetical measurements to the above mentioned fields,soil erosion can be prevented and the substainable development of agriculture can become true