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对宁夏盐池退化沙地不同密度的人工柠条林地的土壤水分时空特征进行分析。结果表明:1)林下土壤体积含水量随着深度的增加呈先增大后降低的趋势,在垂直剖面上可分为土壤水分速变层(0-20cm)、活跃层(20-80cm)、相对稳定层(80-100cm);2)土壤水分季节动态变化可划分为:积累期(4-5月);消耗期(6-9月);稳定期(10月至次年4月)3个时期;3)土壤体积含水量随人工林密度增加呈下降趋势,2490丛/hm2和1665丛/hm2可作为该区人工柠条林调控密度的参考依据。
The spatio-temporal characteristics of soil moisture in different densities of artificial Caragana korshinskii woodland in Yanchi degraded sandy land of Ningxia were analyzed. The results showed as follows: 1) The volume of soil water volume under forest increased firstly and then decreased with the increase of soil depth, and could be divided into three types: the rapid change layer of soil moisture (0-20cm), the active layer (20-80cm) , Relatively stable layer (80-100cm); 2) The seasonal variation of soil moisture can be divided into: accumulation period (April-May); consumption period (June-September); stable period (October-April) 3 periods; 3) The soil water content decreased with the increase of plantation density, and 2490 plexions / hm2 and 1665 plexions / hm2 could be used as reference for the regulation of the density of Artemisia scoparia in this area.