Water-holding Characteristics of Soil and Litter of Three Different Arbor Populations in the Subalpine Zone of Chagangliang Nature Reserve
In order to further study the hydrological characteristics of the main subalpine population types in Chagangliang Nature Reserve,Bailongjiang River,Gansu Province,three representative planting types of abie-rhodoea,abie-red birch and abie-cypress trees with similar site conditions were selected as the research objects,and the water holding capacity of the ground litter and soil un-der the forest was determined.The results showed that:(1)the soil bulk density of the three popula-tions ranged from 0.50 to 0.79 g·cm-3.The soil bulk density of the abies+alpine cypress population was small,and the changes of soil capillary water holding capacity,maximum water holding capacity and minimum water holding capacity were consistent.The soil bulk density was negatively correlated with the total soil porosity,capillary water holding capacity,minimum water holding capacity and maximum water holding capacity,and the water holding capacity was the strongest.(2)The litter storage,maximum water holding capacity,maximum water holding rate,effective storage capacity and maximum storage capacity were the largest,and water holding performance of the litter was the best.The litter thickness,fresh storage and storage capacity were positively correlated with the total dry weight.(3)The change trend of water absorption rate of litter in different populations is basically the same as that of soil water absorption rate,which is the maximum at less than 0.5 h,and then gradually decreases with time,reaching saturation at 24 h,and the water absorption rate tends to 0.
万方数据
维普
