为研究油松人工林土壤水分对不同等级降雨量的响应情况，以西宁市南北山油松人工林为研究对象，测定样地林外降雨量和土壤含水量，利用图表统计法分析西宁市南北山油松人工林土壤水分对降雨的响应。结果表明:在大等级郁闭度小中雨条件下，分别只有表层0～10 cm和0～20 cm 土层具备水分响应;在大雨条件下，土壤水分响应深度可达30 cm。在中小等级郁闭度小雨条件时，土壤水分响应深度可达0～20 cm 土层;中雨条件下，响应深度可达＞20～30 cm 土层;在大雨条件时，土壤水分响应深度可达＞30～40 cm 土层。在相同降雨等级下，各层土壤水分对降雨的响应随着郁闭度的提高而减弱。
Responses of Soil Moisture to Rainfall in Pinus tabulaeformis Plantations in the North-south Mountains of Xining City
In order to study the response of soil moisture of Pinus tabulaeformis plantations to different levels of rainfall,the Pinus tabulaeformis plantations in the north-south mountains of Xining City were taken as the research object,and the rainfall and soil water content outside the plot were measured.The response of soil moisture to rain-fall in Pinus tabulaeformis plantations in the north-south mountains of Xining City was analyzed by chart statistics.The results showed as follows:in the large grade canopy density,under the condition of light and moderate rain,only the soil layers of 0-10 cm and 0-20 cm had water response;under the condition of heavy rain,the response depth of soil moisture could reach 30 cm.While in the canopy density of medium and small grade,under the condition of light rain,the response depth of soil moisture could reach 0-20 cm soil layer;under the condition of moderate rain,the response depth of soil moisture could reach＞20-30 cm soil layer;under the condition of heavy rain,the re-sponse depth of soil moisture could reach＞30-40 cm soil layer.In the same rainfall level,the response of soil moisture in each layer to rainfall decreases with the increase of canopy density.
万方数据
维普
