额济纳胡杨林土壤含水量时空变化的研究  

A Study on Soil Moisture Variation of Natural Populus Euphratica Forest Stand in Ejina

作　　者：萨如拉[1] 豪树奇[2] 张秋良[1] 伊力塔[2] 

机构地区：[1]内蒙古农业大学林学院,内蒙呼和浩特010019 [2]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《林业资源管理》2006年第1期59-62,共4页Forest Resources Management

基　　金：国家自然基金研究项目"天然胡杨根土界面水分输移与盐胁迫相关机理的研究"(30460017)

摘　　要：使用管状土壤水分仪,对额济纳胡杨林、沙枣林、柽柳林以及其它不同样地的土壤含水量时空变化进行了调查研究.结果表明,大部分样地有大约20cm的干沙层,使表层土壤含水量最低;土壤剖面的30～150cm土层内,随土壤深度的增加,土壤含水量逐渐增大;沙枣林和柽柳林的土壤含水量明显高于胡杨林土壤含水量;土壤质地的变化和三种林型耗水量的差异是土壤含水量高低变化的原因; 2004年5月份的土壤含水量明显高于2003年7月份的土壤含水量。The research on the variability of soil moisture content Populus Euphratica , Elaeagnus angustifolia , Tamarix ramosissima , and other different types of land in Ejina indicates that there are about 20cm dry sand layers in most parts of land. That makes the surface soil water content at the lowest level, between 2 % -5 %. The water content in soil is raised from upper to lower, but not very obvious between 30～150cm layers . The water content in soil of Elaeagnus angustifolia and Tamarix ramosissima is much more than Populus Euphratica＇ s. And it becomes highest in Elaeagnus angustifo- lia. The texture of soil and forestry types are important factors which influence the water content of soil obviously. The water content in May,2004 was much higher than in July, 2003.

关 键 词：额济纳 胡杨林 土壤含水量 

分 类 号：S714[农业科学—林学]