人工油松林系统水土保持功能的叠加效应

用理论分析和典型观测的方法研究了人工油松林系统水土保持功能的叠加效应。结果表明 :与荒坡灌草小流域相比 ,人工油松林系统减小净雨作用明显 ;对两次次降水而言 ,人工油松林系统对径流时间的滞后效应各为荒坡灌草的 2 .5倍和 4 .3倍 ;对径流动能的减小效应分别为 2 5 .0倍和 166.4倍 ;对挟沙能力的减小效应分别为 2 4 .4倍和 163 .3倍。人工油松林系统能改良土壤 ,使其抗冲、抗蚀性能提高 ,此种双向作用使人工油松林发挥了良好的水土保持作用。

Accumulation Effects on Function of Soil and Water Conservation in Artificial Chinese pine Forest System

Accumulation effects of soil and water conservation function of artificial Chi nese pine forest system have been studied by methods of theory analysis a nd typical measurement. The results showed compared with bare-slope and bush-g rass catchement, the function that artificial Chinese pine forest system increas ed pure precipitation is evident,effects of artificial Chinese pine forest syst em to runoff time retarded is 2.5 and 4.3 times of bare-slope and bush-grass catchement, effects of artificial Chinese pine forest system to runoff kinetic increased is 25.0 an d 166.4 times of bare-slope and bush-grass catchement, effects of artificial Chinese pine forest system to capacities of runoff carried sediment increased i s 24.4 and 163.3 times of bare-slope and bush-grass catchement. Artificial Chi nese pine forest system can improved soil structure resulting in soil anti-scou rability and anti-erodibility, and its function made artificial Chines e pine forest system to take play a great role of soil and water conservation.