国家基础科学发展计划（973）项目“沙区土壤水分时空分布格局与区域分异规律”（2013CB429901）
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[目的] 对ECH2O EC-5土壤水分传感器测定科尔沁沙地土壤含水率的可靠性进行验证。[方法] 以烘干法测定数据为基准值，采用回归分析方法建立ECH2O EC-5水分传感器测定沙地土壤含水率的校正方程，并用独立的样本进行验证。[结果] ECH2O EC-5水分传感器测定值与烘干法测定值之间具有很好的线性回归关系（R2=0.96），呈显著正相关（p<0.01）；验证结果显示，ECH2O EC-5土壤水分传感器测定值经回归方程校正后与基准值之间的均方根误差（RMSE）、相对均方根误差（RRMSE）分别为0.38%和6.29%。[结论] ECH2O EC-5土壤水分传感器测定的沙地土壤水分值准确度较高，具有很高的可靠性。
[Objective] The soil water content in Horqin sandy land was measured by ECH2O EC-5 sensor to validate the reliability of the sensor. [Methods] Values obtained by weighting method was compared with the ones of ECH2O EC-5 sensor measurement, and calibrated with regression analysis. [Results] The equation of water correction between the values of weighting method and the ones of sensor measurement for the sandy land was a linear function(R2=0.96, p<0.01). The validation results showed that the root mean square error(RMSE) and relative root mean square error(RRMSE) between the soil water contents predicted by regression equation and the contrast standard values were 0.38%, 6.29%, respectively. [Conclusion] Soil water contents measured by ECH2O EC-5 sensor for sandy land were accurate and reliable.
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何修道,王立,党宏忠,韩辉,吕文强. ECH2O EC-5水分传感器测定沙地土壤含水率的可靠性[J].水土保持通报,2016,36(4):68-71,77
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- 收稿日期:2015-09-01
- 最后修改日期:2015-09-25
- 在线发布日期: 2016-09-21