彰武农田土壤沙化防治措施的效果研究

Effect of the Preventing Measures on Farmland Sandy Desertification in Zhangwu

从农、牧、林角度比较了防护林(A)、农林复合(B)和林牧复合(C)三种措施防治沙化的效果。试验结果显示:C防护下的农田土壤机械组成最好,B次之,A最差;A和B防护的农田分别存在约4H和2H长的防护减弱区,C防护的农田未出现明显的防护减弱区;土壤粗糙度比较结果表明C最大,B次之,A最小;在相同的情况下,A土壤风蚀量最大,B次之,C最小。综合分析说明三种防护措施中,林牧复合型的防护效果最好,其次是农林复合型措施,防护林效果最差。

The farmland sandy desertification preventing effect was compared ; protective forest （A）, the farming and forestry compound （B） and the forest and pasture compound （C）. The results indicated that; The soil mechanical composition that under the protection of C were the best, followed by B and A. The protective weaken areas under the protection of A and B were about 4H and 2H length, respectively. There was no obviously the same area under the protection of C. The roughness results showed that the descending order of the three measures was C, B and A. While the same order of soil wind erosion quantity was just the opposite. In a word, the preventing effect of C was the best, and B was better than that of A.