关键词: 荒漠地区, 人工植被, 土壤水分, 时间稳定性

Abstract:

The aim of this paper is to discuss the applicability of temporal stability theory in soil moisture of artificially revegetated desert area. Here we analyzed the temporal stability of soil moisture content in an area of 0.45 hm2 located in the artificially revegetated desert area where has been fixed for fifty years and the bio-crust covered the whole surface. The data from a network consisting of 60 soil moisture measuring points over a period of 7 months (from April to October 2005) were used. At each point, soil moisture was measured at the different time using time domain reflectometry (TDR) in the depths of 15 cm and 30 cm. The results clearly showed which point was the mean representative soil moisture point. The temporal stability was high under even the most extreme situations. This pattern was more obvious in the depth of 30 cm than in the depth of 15 cm and the temporal stability was always higher when the soil was dry than when the water content was high.

Key words: desert area, artificially revegetated plants, soil moisture, temporal stability