榆林沙区两种土壤水分测定方法比较研究  

Comparative Study on Two Soil Moisture Measurements in Sandy Area of Yulin

作　　者：王雯[1] 张雄[1] 

机构地区：[1]榆林学院生命科学学院,陕西榆林719000

出　　处：《榆林学院学报》2015年第4期21-24,共4页Journal of Yulin University

基　　金：榆林市产学研合作项目(2014cxy-03);榆林学院高层次人才科研启动项目(14GK41)

摘　　要：土壤水分是影响榆林沙区农业发展以及生态恢复的重要因素。通过烘干法与TDP法测定土壤含水量的对比试验,结果表明,（1）回归分析显示,不同土壤水分状况和不同植被类型对TDR法测定结果的影响较小,TDR法和烘干法测定的土壤含水量呈极显著的正相关关系（R2〉0.9344,P〈0.0001）。（2）与烘干法的测定值相比,TDR法的测定值误差较小。不同样地灌溉前和灌溉后,TDR法测定值的相对误差变化范围为1.54%~3.60%,平均为1.92%。总体来看,TDR法测定结果准确度较高,在榆林沙区土壤水分测定及研究等方面具有广阔前景。Soil moisture is an important factor influencing the development of agriculture and ecological restoration in the sandy area of Yulin. A comparative experiment is conducted to study the measurement of soil water content with TDR method and oven drying method. The results show the following. Regression analysis indicates that different soil water conditions and vegetation types have little influence on the measured values of the TDR method.There is a highly significant correlation between measured values of soil water content with TDR method and oven drying method（ R2 0. 9344,P 0. 0001）. The measured values with TDR method had smaller error when compared with oven drying method. Before and after irrigation in the different sample plots,the range of relative error in measured values of the TDR method is 1. 54% ~ 3. 60%,with an average of 1. 92%. Overall,TDR method has high accuracy which has broad prospects in the soil moisture measurement and study in the sandy area of Yulin.

关 键 词：TDR法 烘干法 土壤含水量 榆林沙区 

分 类 号：S157.2[农业科学—土壤学]