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以金沙江干热河谷6种人工林为例,采用TRIME-PICO-IPH TDR测定雨季(6-10月)土壤水分,每个样地设3个重复,分析不同人工林内的土壤水分变化特征。罗望子纯林土壤含水量稳定,变异系数小,且含水量较其他人工林高。随着深度的增加,不同人工林之间的土壤含水量差异逐渐变小。根据土壤对降雨的蓄积、利用情况,将0-100cm的土壤剖面分为水分剧烈变化层、弱利用层,草本植物水分利用层、土壤水分微调节层。
Taking six kinds of plantations in the dry-hot valley of the Jinsha River as an example, the soil moisture in the rainy season (June-October) was measured by TRIME-PICO-IPH TDR. Three replicates were set up for each plot to analyze the changes of soil moisture in different plantations. Pure tamarind forest soil moisture content is stable, the coefficient of variation is small, and the water content higher than other plantations. With the increase of depth, the difference of soil water content between different plantations gradually became smaller. According to soil accumulation and utilization of rainfall, the 0-100cm soil profile is divided into a dramatic change layer of water, a weak utilization layer, a herbaceous plant water use layer, and a finely tuned layer of soil moisture.