库布齐沙漠人工梭梭林地土壤储水量动态变化及其水分平衡分析

A STUDY ON MOISTURE BALANCE OF ARTIFICIAL HALOXYLON AMMODENDRON FOREST IN KUBUQI DESERT

利用土壤水分消耗法对库布齐沙漠不同立地人工梭梭林,由生长季初期与末期土壤含水量的变化量计算了其生长季的土壤水分平衡状况。结果表明,不同立地梭梭林各样地均呈现出不同程度的水分盈余状态,即各样地梭梭群落的蒸散量小于同期降水量及地下水的补给量,使得土壤水分呈现盈余状态。并且,通过对不同立地梭梭人工林土壤水分资源容量与群落稳定性的讨论,提出了群落水分稳定性机制。

Soil moisture variation of artificial Haloxylon ammodendron vegetation on early and late growth stages was calculated with soil moisture consumption method in Kubuqi desert.The results of soil moisture balance in growth season show that different sit of Haloxylon ammodendron vegetation indicate different degree of water surplus.That is because of Evapotranspiration of Haloxylon ammodendron community of each plot is smaller than summation of precipitation and groundwater＇s replenishment in synchronization.The community＇s water stability mechanism was brought through discussions of community stability and water resource capacity in different soil condition.