ZHANG You-yan,ZHOU Ze-fu,CHENG Jin-hua,et al.Variation of Soil Moisture of Several Shrubs in Mu Us Sandland During Growing Season[J].Research of Soil and Water Conservation,2010,17(02):160-163.
毛乌素沙地几种灌木生长季土壤水分动态特征
- Title:
- Variation of Soil Moisture of Several Shrubs in Mu Us Sandland During Growing Season
- 关键词:
- 土壤水分; Brown-Forsythe检验; 毛乌素沙地
- Keywords:
- soil moisture; Brown-Forsythe test; Mu Us sandland
- 分类号:
- S152.7
- 摘要:
- 土壤水分是影响沙漠植物生长的主要因素之一，该文以毛乌素沙地3种灌木为研究对象，分析了其生长季土壤水分变化特点，并采用Brown-Forsythe检验方法比较几种灌木覆盖下土壤表层（0-20 cm）水分含量与裸沙地的差异。结果表明：土壤水分的变化受到根系深度和降雨特征的影响较大。不同灌木地下30-50 cm处土壤水分含量波动明显，是由于根系吸水导致。2004年灌木地土壤含水量在8月最大，而2005年为7月底最大，是由于降雨特征不同导致。油蒿与裸沙地土壤表层含水量差异显著（Sig=0.04<0.05），而沙地柏、杨柴与裸沙地土壤表层含水量差异不显著（Sig值分别为0.239和0.308，均大于0.05），即油蒿对保持沙地土壤表层水分含量效果显著。
- Abstract:
- Soil moisture is one of the main factors affecting the growth of plants in sandland. Taking 3 shrubs in Mu Us sandland as study objectives, this paper analyzed the variation of their soil moisture, and tested the difference of soil moisture in top layer between shrubs and bared sandland by Brown-Forsythe method. The results show that the variation of soil moisture is affected largely by root depth and rainfall characteristics. The soil moisture in the depth of 30-50 cm varied obviously because of the water uptake of roots. Soil moisture is the highest in August in 2004, and July in 2005. Artemisia ordosica has significant effect on top soil moisture (Sig=0.04<0.05), and Sabina vulgaris and Hedysarum mongolicum have no siginificant difference with bared sandland (Sig value is 0.239 and 0.308 respectively), which means that Artemisia ordosica can keep the moisture of topsoil.
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备注/Memo
收稿日期:2009-10-29。
基金项目:国家科技支撑课题（2006BAD26B06）；国家农业节水专项 （2002AA2Z4271）
作者简介:张友焱（1975- ），男，博士，湖南岳阳人，助理研究员，主要从事植被恢复研究。E-mail：youyanzh@caf.ac.cn