祁连山主要植被下土壤水的时空动态变化特征

Dynamic Characteristic on Space-time of Soil Water of Main Vegetation in Qilian Mountains

通过对祁连山青海云杉林、祁连圆柏林、亚高山灌丛林、牧坡草地等4种主要植被类型的土壤水测量数据进行分析表明,土壤水的空间垂直动态表现为随深度的增加而减少,可划分为土壤水分易变层、利用层、调节层三个层次;土壤水的时间动态可划分为土壤失水期、聚水期、退水期、稳水期四个时期。土壤水总的特征是,不同植被地类的土壤水季节变化规律基本一致,主要受降水量及其分配的影响。

Based on the measured data on soil water of 4 types main vegetation: picea crassifila, Sabina, brushes, grazing in Qiiian Mountains, made clear that soil water was reduced as increased deep of soil in vertical space and it was delimited 3 gradation: soil water layers easily transformed, used , regulate. Tendency of soil water was less, much and less, it was delimited 4 stages: the seasons of soil water lost, assembled, receded, stabled. Dynamic characteristic on soil water was that its season changes of different vegetations were same, which was affected by precipitation and its distributed.