不同模式退耕还林地上径流和侵蚀研究

Study on Woodland Runoff and Erosion of Different Model Conversion of Farmland Back to Forests

在退耕还林工程建设中,为了提高工程质量,发挥更大生态功效,采取了一些不同的退耕还林模式,通过对该区不同模式乔木型、乔草型、经济林型在其主要生态功效径流和侵蚀方面的研究,在退耕还林初期乔木型、乔草型、经济林型较对照农田年径流模数降低62.78%、42.24%、50.20%,侵蚀模数降低79.5%、60.7%、71.7%,从而总结出乔木型在水土保持方面成效显著,在水土流失严重的区域退耕还林应以乔木型为主。

In the project of conversion of farmland back to forests, different conversion of farmland back to forests models were used in order to improve engineer equality and make full use of ecological benefits, through the study on ecological benefits of runoff and erosion of different models including arbor type, arbor-herb type and economic forest in the region ,in early days of conversion of farmland back to forests, farmland annual runoff modulus had decreased by 62.78% ,42.24%,50.20% as compared with arbor type, arbor-herb type and economic forest , erosion modulus decreased by 79.5%,60.7%.71.7%, the results showed that arbor type had significant efficiency in soil and water conversation, so it should be main model for conversion of farmland back to forests in severe soil and water loss region.