植被措施控制水土流失机理及其效益研究

植被具有良好的保持水土，涵养水源，改善生态环境的作用，植被从林冠至根系在不同层面上减缓径流对土壤的冲刷，并改善土壤入渗，减少坡面泥沙的输移，水土流失量减少，探讨植被滞洪减沙作用机理，并利用野外实测资料进行分析，定量描述了植被控制水土流失的效益，为进一步研究防止水土流失提供了可靠的依据。

Study on the Principles and Benefits of Plants to Control Water and Soil Losses

Plants have significant benefits in conserving water and soil,protecting water resources,and improving ecological environments.From the crown to the plant roots of the plants,they reduce the flows and its amouring the soil,improve the soil infiltration of the flows,reduce the sediment transport on the slope,as a result,the water and soil losses also became smaller.After analyzing the principle of the plants to reduce sediment and the field data,the benefits of the plants to control the water and soil losses was obtained,the results would be helpful for the study on protecting water and soil losses.