梯田对赣北第四纪红壤坡地土壤抗蚀性的影响

Influence of Terraced Fields to Soil Anti-Erodibility of Quaternary Red Soil Sloping Land in the Northern Jiangxi

为研究梯田措施对赣北第四纪红壤坡地土壤抗蚀性的影响,通过江西水土保持生态科技园9年的定位观测资料,对5种梯田措施下的土壤抗蚀性变化进行了分析。结果表明:与对照坡地相比5,种梯田措施均具有提高土壤稳定性和降低土壤分散性的作用;水平梯田配合前埂后沟和梯壁植草技术,更利于改善土壤团聚状况,提高土壤团聚度,降低土壤分散率和侵蚀率。前埂后沟和梯壁植草式水平梯田适宜在红壤坡地推广。

The paper analyzed the variation of soil erodibility under the conditions of 5 terrace measures by using 9-year positioning observation data of Jiangxi soil and water conservation eco-tech park in order to study on the influence of terrace measures to soil erodibility of quaternary red soil sloping land in the northern Jiangxi.The outcomes show that comparing with the check sloping land,all the 5 terrace measures have the functions of increasing soil stability and reducing soil dispersibility.Coordinating with the techniques of building ridges in front and ditches at back and planting grasses on terrace walls,leveled terraced fields are better for improving the condition of soil aggregation,increasing the degree of soil aggregation and reducing the dispersion rate and erosion rate of soil.The leveled terraced fields with building ridges in front and ditches at back and planting grasses on terrace walls are properly to be popularized in red soil sloping land.