Dynamic Characteristics Of Soil Moisture And Soil Water Conservation Ability In Liupanshan Haizi Basin

The construction of water conservation forest in Haizi watershed is very important for the ecological,social and economic sustainable development of Liupanshan area in Ningxia.However,in recent years,due to the long-term deforestation,the soil erosion is serious and the erosion resistance is poor,Poor growth,water conservation capacity decreased,the ecological environment gradually deteriorated.Seriously restricting the local economic and social development.In this paper,water conservation forest such as Pinus tabulaeformis forest and larch forest were used as experimental objects.The method of field experiment and indoor experiment was used to determine the water conservation ability of soil.The water conservation capacity of the same vegetation and different plantation soils under different conditions was analyzed.The main conclusions are as follows:(1)Soil surface(0-20cm)had the lowest average bulk density,and its soil performance was better than that of middle and lower soils.The surface properties of natural secondary larch forest were better than that of middle and lower layer.The soil water content in the forest land was 20.82%-34.14%and the total porosity was between 36.60%and 58.30%.The average soil infiltration rate of the shady slope was higher than that of the sunny slope.Soil;the average soil water storage capacity of forest land is as high as 2772.16 t/hm2.(2)The water conservation capacity of forest resources in Haizi River Basin is stronger than that in Robinia pseudoacacia forest,Pinus tabulaeformis forest and Larch forest.