半干旱沙地3种土壤水分测定方法对比研究  

Comparative Study on Three Measures of Soil Moisture Determination in Semi-arid Sandy Land

作　　者：张军红[1] 吴波[1] 杨文斌[1] 崔利强[2] 

机构地区：[1]中国林业科学研究院荒漠化研究所国家林业局林木培育重点实验室,北京100091 [2]内蒙古农业大学生态环境学院,内蒙古呼和浩特010019

出　　处：《水土保持通报》2012年第2期147-149,共3页Bulletin of Soil and Water Conservation

基　　金：国家林业局林业公益性行业科研专项“荒漠生态系统对全球变化的响应与适应策略”(201104077);中国林业科学研究院中央公益性科研院所基本科研业务费专项资金重点项目“干旱区荒漠植物与生态系统对脉冲式降雨的响应”(CAFYBB2007008)

摘　　要：土壤水分是影响干旱、半干旱地区植物生长和发育的重要因素。分别采用烘干法、TDR法(时域反射计)和EC-5法这3种方法对毛乌素沙地土壤水分进行了观测。结果表明,3种方法测得的各层土壤含水率之间均无显著差异;3种方法测得结果彼此间相关性显著;EC-5在观测低含水率土壤水分中具有与烘干法和TDR法相当的效果。EC-5土壤水分传感器在组建自动化、网络化土壤监测系统中具有优势。Soil moisture is an important factor for plant growth and development in arid and semiarid areas.We used three methods of drying methods,TDR（time domain reflectometry） and EC-5 sensor to observe soil moisture variations in the Mu Us sandy land.The results show that there was no significant difference in the soil moisture contents measured using the three methods in different layers.The values from the three methods were significantly correlated.EC-5 sensors could be used in observation low water contented soils with a precision level similar to traditional methods like drying and TDR.Furthermore,EC-5 is more suitable in developing an automated soil moisture monitoring network.

关 键 词：毛乌素沙地 土壤水分 测定 

分 类 号：S152.7[农业科学—土壤学]