榆林沙区土壤水分时空格局及动态变化规律研究  

Research on Temporal and Spatial Patterns and Dynamic Laws of Soil Moisture in Yulin Sand District

作　　者：尚爱军[1] 卜耀军[1] 艾海舰[1] 刘翠英[1] 张雄[1] 

机构地区：[1]榆林学院,陕西榆林719000

出　　处：《水土保持学报》2008年第4期86-89,共4页Journal of Soil and Water Conservation

基　　金：陕西省交通厅项目(05HX01);香港何崇鋈教育基金项目(06HX01);陕西省自然科学基础研究项目(2007C126);陕西省教育厅科技计划项目(07JK443;07JK174);榆林学院高学历人才科研项目(06GK011);榆林学院校内项目(06YK027)

摘　　要：采用定位取样与烘干法,测定了榆林沙区几个树种土壤含水量。结果表明:各树种土壤含水量变化规律为:樟子松>柠条>紫穗槐>沙柳>沙蒿>花棒-踏郎;土壤含水量的垂直分布格局为表层土壤含水量最低,随着土壤深度的增加,土壤含水量呈增加趋势;土壤含水量的季节动态规律为不同树种土壤含水量具有明显的季节变化规律,土壤含水量按季节变化可分为3个阶段,4-5月的土壤水分弱失水阶段,6-8月的土壤水分消耗阶段,9-10月的土壤水分缓慢恢复阶段。This article uses the localization to take a sample and to dry the law, has determined the Yulin sand district several trees soil moisture. The results are as follows., soil moisture content＇s vertical distribution pattern is lowest for the surface layer soil moisture content, along with depth of soil increase, the soil moisture content assumes increases the tendency; Soil moisture content＇s season dynamic rule has the obvious seasonal variation rule for the different tree species soil moisture content, the soil moisture content may divide into three stages according to the seasonal variation,soil moisture weak dehydration stage from April to May, soil moisture consumption stage from June to August, soil moisture restores the stage slowly from September to October; Various trees＇ soil moisture change rule for Pinus sylvestris var. mongolica〉Caragana korshinskii〉Amorpha fruticosa 〉 Salix psammophila 〉Artemisa arenaria DC. 〉Hedysarum scoparium-Hedysarum fruticosum.

关 键 词：榆林沙区 土壤水分 时空格局 

分 类 号：S152.7[农业科学—土壤学]