Research On The Natural Secondary Forest Of Juglans Mandshurica In Mountain Region Of Liaoning Eastern

In this paper, taking the natural secondary forest of Juglans mandshurica maxim as an example to analyze soil hydrological function of the Liaodong mountain high water conservation forest. It main investigats and analysises of litter reserves and absorbing and releasing water status, soil anti scourability, soil water physical properties and infiltration. On this basis, the infiltration characteristics of soil water distribution in SPSS analysis.The litter reserves and absorbing and releasing water performance analysis, effective moisture and reserves of litter are positively correlated (R=0.995), the release rate of litter moisture appeared two peaks (5h-8h and 31h-35h), the release rate of moisture by litter appeared two peaks (5h-8h and 31h-35h). The soil erosion test show that trend of sediment content in water shows an inverted "J" shape, impact coefficient changing with time accord exponential function (f (t)=AtB)After the natural secondary forest of Juglans mandshurica soil water infiltration capability, steady infiltration rateand interference index was positively correlated with the interference index (R=0.918*, n=15), soil water infiltration rate and infiltration time with the Kostiakov infiltration model, indoor and field measured soil infiltration rate differences.Through the analysis of Juglans mandshurica natural secondary forest soil physical indicators, bare land can increase the soil loss; soil moisture characteristic in Liaodong hill high water conservation forest growth period Can be divided into four periods:the period of water moisture (May), dehydration period (June), poly water period (July and August) and stable water period (September and October); the soil moisture decreases with increasing depth, and the lateral migration in the lower layer soil are significant. Litter and soil total holding water changes with time are in line with the curve of S type; litter and the suction penetration amount changes from 924.1mm to 1000.2 mm.According to the results of the above analysis, the walnut natural secondary forest in Liaodong mountain can absorbing a lot of rain, the release of relaxation when necessary. We should promote the quality and efficiency of water conservation forest model, let the watershed or regional water conservation ecological function into full used.