盐分对土壤水分传感器测量精度的影响及适用性评价

胡慧玲; 王峰; 冯泉清; 韩其晟; 宁慧峰; 李小刚; 王景雷

引用本文:	胡慧玲,王峰,冯泉清,等.盐分对土壤水分传感器测量精度的影响及适用性评价[J].灌溉排水学报,0,():-.
	hu huiling,wang feng,feng quanqing,et al.盐分对土壤水分传感器测量精度的影响及适用性评价[J].灌溉排水学报,0,():-.

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盐分对土壤水分传感器测量精度的影响及适用性评价
胡慧玲¹, 王峰², 冯泉清¹, 韩其晟², 宁慧峰², 李小刚³, 王景雷²
1.中国农业科学院农田灌溉研究所/农业农村部作物需水与调控重点开放实验室，中国农业科学院研究生院;2.中国农业科学院农田灌溉研究所/农业农村部作物需水与调控重点开放实验室;3.新疆生产建设兵团第一师水文水资源管理中心

摘要:

【目的】探明盐分和水分对土壤水分传感器测量精确度和准确度的影响，并进行适用性评价。【方法】在新疆阿拉尔兵团第一师灌溉试验站开展室内试验，选用FDR和TDR类型传感器，试验设置5个盐分梯度（分别为2、3、5、7、9mS/cm），土壤含水率调配至田间持水量之后自然蒸发，用绝对误差AE和相对误差RE度量准确度，绝对误差的标准差SD度量精确度。【结果】传感器的精确度和准确度受土壤盐分和水分的影响。标定前，CSF11和ML2x的准确度较高且精确度表现稳定，EC-5和TDR305H由于受土壤盐分和水分的双重影响，准确度和精确度较低。标定后，四种传感器的准确度和精确度明显改善。【结论】综合准确度、精确度和价格因素，资金充裕且含盐量不超过9mS/cm时，可选用ML2x；资金紧张时，低盐条件下选用CSF11，中高盐条件下选用EC-5；当水分含量不超过20cm3/cm3时可选用TDR305H。

关键词: 土壤水分、FDR、TDR、土壤含盐量、精确度、准确度、标定

DOI：

分类号:S152.7

基金项目:

Effect of salinity on measurement accuracy of soil moisture sensor and its applicability evaluation

hu huiling¹, wang feng², feng quanqing¹, han qisheng², ning huifeng², li xiaogang³, wang jinglei²

1.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Water Demand and Regulation, Ministry of Agriculture and Rural Affairs. Chinese Academy of Agricultural Sciences.;2.Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Crop Water Demand and Regulation, Ministry of Agriculture and Rural Affairs;3.Xinjiang Production and Construction Corps First Division Hydrology and Water Resources Management Center

Abstract:

[ Objective ] The aim was to explore the effects of salt and water on the measurement accuracy and accuracy of soil moisture sensor, and to evaluate its applicability. [ Method ] The indoor experiment was carried out in the irrigation test station of the first division of Alar Corps in Xinjiang. The FDR and TDR sensors were selected. Five salt gradients ( 2, 3, 5, 7, 9 mS / cm, respectively ) were set in the experiment. The soil moisture content was adjusted to the field capacity and then evaporated naturally. The absolute error AE and relative error RE were used to measure the accuracy, and the standard deviation SD of absolute error was used to measure the accuracy. [ Result ] The accuracy of the sensor was affected by soil salinity and moisture. Before calibration, the accuracy of CSF11 and ML2x was high and stable, while the accuracy and precision of EC-5 and TDR305H were low due to the dual effects of soil salinity and moisture. After calibration, the accuracy and precision of the four sensors are significantly improved. [ Conclusion ] Considering the accuracy, accuracy and price factors, ML2x can be selected when the capital is sufficient and the salt content is less than 9 mS / cm. When funds are tight, CSF11 is selected under low salt conditions, and EC-5 is selected under medium and high salt conditions ; TDR305H can be used when the moisture content does not exceed 20cm3 / cm3.

Key words: Soil moisture, FDR, TDR, soil salinity, precision, accuracy, calibration