残茬覆盖对土壤风蚀影响的试验研究

Study on The Effects of Soil Wind Erosion with Stubble Mulch

在黑龙江省安达牧场建立土壤风蚀试验区,采用风蚀采样器测试不同处理形式的土壤风蚀损失,试验结果表明:通过残茬覆盖可明显减少风蚀损失,其中,80%覆盖相对于无覆盖减少总风蚀63.9%,50%覆盖相对于无覆盖减少57.7%,30%覆盖相对于无覆盖减少46.9%,因此,当覆盖量增加到一定程度对风蚀量的影响越来越小。在100cm以下高度,随覆盖程度的增加,各不同高度记录到的风蚀量迅速减少;超过100cm以后,风蚀量虽然也随着覆盖量的增加在逐渐减少,但下降幅度降低。

A field experimental plot was set up in Anda farm Heilongjiang province. The soil loss of wind erosion was tested with sampler in different dealing. The results showed that the soil loss of wind erosion could be reduced efficiently with stubble mulch. The total loss of wind erosion was reduced 63.9% that comparing 80% with 0 stubble mulch, 57.7% comparing 50% with 0 stubble mulch, 46.9% comparing 30% with 0 Stubble Mulch. The effect of wind erosion is smaller and smaller as the quantity of stubble mulch. increasing. when the quantity of stubble mulch increasing, the wind erosion was reduced rapidly under 100 cm high, but the wind erosion was reduced slowly above 100 cm high along with the quantity of stubble mulch increasing and the range of descending was lower.