时域反射仪和时域传输仪在盐渍化土壤中的适用性分析  

Time Domain Reflectometry and Time Domain Transmission Apparatus in Saline Soil Suitability Analysis

作　　者：卢响军[1] 周益民[1] 盛建东[2] 武红旗[2] 宁松瑞[3] 

机构地区：[1]新疆生产建设兵团环境监测中心站,新疆乌鲁木齐830011 [2]新疆农业大学草业与环境科学学院,新疆乌鲁木齐830052 [3]中国农业大学资源与环境学院,北京100094

出　　处：《土壤通报》2013年第4期826-829,共4页Chinese Journal of Soil Science

基　　金：国家公益性行业(农业)科研专项经费项目(200903001-3);新疆土壤学重点学科基金项目资助

摘　　要：为了探讨在盐渍化土壤中时域反射仪(Time Domian Refractometer,TDR)和时域传输仪(Time domain transmission,TDT)测定土壤含水量的精度,通过室内模拟试验,对盐渍化土壤在不同容重和含盐量水平下的土壤含水量进行标定分析。结果表明,在不同容重条件下TDR和TDT的土壤含水量测定结果与烘干法测定的结果均达到极显著水平。土壤含盐量在2 g kg-1时TDR和TDT的测定结果与实际烘干测定的结果相一致,达到极显著水平。土壤含盐量在12 g kg-1时TDR出现读数消失的情况,TDT能够正常读数,并达到极显著水平。因此,低于12 g kg-1的盐渍化土壤中TDT可以测定实际土壤含水量。A study was conducted on time domain refractmeter （TDR） and time domain transmission （TDT） to explore determination accuracy of soil water content. Through simulated experiments, soil water content of the saline soil were calibrated and analyzed under different soil bulk density and salinity levels. The results showed that the results of soil water content determination by TDR and TDT determination and method of drying soil reached extremely significant level under different soil bulk density. The results of soil water content determination by TDR and TDT determination and method of drying soil reached extremely significant level when soil salt content was 2 g kg^-1. TDR determination readings disappeared when soil salt content was 12 g kg^-1, On the contrary, TDT determination readings was rational, and reached extremely significant level. Therefore, soil water content accurately was determined by TDT under the saline soil of less than 12 g kg^-1.

关 键 词：时域反射仪(TDR) 时域传输仪(TDT) 土壤容重 土壤含盐量 土壤含水量 

分 类 号：S152.7[农业科学—土壤学]