Soil Moisture Characteristics of Major Afforestation Tree Species in North and South Mountains of Xining City
In order to explore the soil moisture characteristics of typical afforestation tree species in North and South Mountains of Xining City and reveal the influence of different tree species on soil moisture,the typical afforestation tree species in the North and South Mountains Greening Project Area of Xining City were selected as the research object,and the natural grassland was used as a control to analyze the soil moisture change characteristics under different afforestation tree species by collecting soil samples and measuring the water content and physical properties.The results showed that the soil moisture contents were natural grassland(15.40%)>artificial shrubland(14.19%)>artificial Pinus tabuliformis forest(13.01%)>artificial Picea crassifolia forest(12.16%)>artificial Populus forest(11.77%),soil physi-cal properties were artificial Populus forest>artificial Pinus tabuliformis forest>artificial Picea crassifolia forest,and the soil moisture within 0-100 cm of soil layer varied with the changes of forest age,stand structure and site conditions,and soil moisture deficiency occurred.Therefore,according to the charac-teristics of soil moisture changes under different vegetation types in North and South Mountains of Xining City,artificial afforestation with a reasonable arbor shrub and grass matching mode was the key to main-taining soil moisture balance.
North and South Mountains of Xining Cityafforestation tree speciesforest stand structuresoil moisturesite conditionsphysical properties of soil
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