TDR测定淡栗钙土水分的标定

TDR MEASUREMENT CALCITE CHESTNUT SOIL MOISTURE CALIBRATION

本实验以荒漠草原2个不同种类的土壤为研究材料,使用TRIME-IPH型TDR测定不同放牧强下的土壤含水量,并以烘干法测定值为真实值对其进行了标定。结果表明:室内标标定中的TRIME-IPH测值与烘干法测值都具有良好的相关性,沙土中的相关系数(R2=0.983 9)略低于壤土(R2=0.986 0),而平均相对偏差(16.4%)大于壤土(12.3%)。校正方程为TDR校正值=0.998 0烘干法测定值+2.3900。在野外标定中,不同放牧强度下TRIME-IPH测值与烘干法测值的相关性也很好,总体校正的相关系数为0.774 3。本研究结果证实,TRIME-IPH完全能够胜任该地区土壤水分动态特征及变化趋势的研究工作。

In this experiment, two different types of desert grassland soil as research materials, TRIME - IPH model using different grazing intensities measured TDR soil moisture, and drying method is to calibrate its true value. The results showed that： Interior Standard Calibration TRIME - IPH measured value and the measured values of drying method has a good correlation, the correlation co- efficient of the sand （R2 = 0.983 9） lower than loam （R2 = 0.986 0）, while the average relative deviation （16.4%） Is greater than loam （ 12.3% ）. Correction equation for the TDRcorrection, = 0.987 9method to meaaure the value - 2. 111 8 drying. Calibration in the field, under different grazing intensities measured values TRIME - IPH and drying method to measure the value of the correlation is also very good, the overall correlation coefficient of 0. 774 3 correction. This study confirmed that, TRIME - IPH fully competent in the area of soil moisture characteristics and trend research.