植被毯措施对黑土农田浅沟侵蚀防护效果的研究

In order to explore the protective effect of vegetation blanket on ephemeral gully erosion in the early stage of vegetation restoration.And to provide scientific basis for ephemeral gully control of black soil farmland.This paper takes the typical black soil magnetism of Heilongjiang province as the research object,through the indoor simulated confluence erosion experiment,the effect of vegetation blanket on runoff and sediment yield of farmland ephemeral gully erosion under different confluence intensity was quantitatively analyzed.The experimental results show that when the confluence intensity of 30L/min is less than that of vegetation blanket,the runoff and sediment yield can be reduced by 16.23%and 80%respectively.When the confluence intensity increases to 40L/min,the sediment reduction benefit of vegetation blanket measures decreases from 82.19%to 26.63%,while the flow reduction benefit decreases from 15.74%to 1.63%,which basically has no flow reduction effect.When the confluence intensity continues to increase to reach 50L/min,the vegetation blanket measure has no effect on sediment reduction and loses its protective effect.The study shows that the vegetation blanket measure can have a better effect on runoff and sediment reduction under a certain confluence intensity,and its sediment reduction effect is obviously higher than that of runoff reduction.Under certain conditions,it can effectively prevent the further erosion of ephemeral gully,and it is helpful to improve the early growth of grass cover and ecological environment.