水资源与水工程学报2024，Vol.35Issue(3)：217-224,8.DOI:10.11705/j.issn.1672-643X.2024.03.25
施肥对TDR土壤水分传感器测量精度的影响研究
Effect of fertilization on measurement accuracy of TDR soil moisture sensor
摘要
Abstract
In order to improve the TDR soil moisture sensor's measurement accuracy,the impact of fertili-zation on the measurement accuracy was analyzed and appropriate calibration methods were proposed.Tak-ing the TDR soil moisture sensor as the research object,three factors of soil texture,soil moisture content and fertilization amount were considered.Loamy sand in Kashgar,silty loam in Karamay and silty clay loam in Changji which are the main soil types in the cotton producing areas of Xinjiang were selected,five soil moisture levels and five fertilization levels were set for the three different types of soil,accounting for a total of 75 treatments.Then,a calibration model for TDR soil moisture sensor was established based on the dr-ying method and the simulation results were validated.The results show that under different soil moisture conditions,the error of the TDR sensor increased with the increase of moisture content.At the same water content,the error of the TDR sensor under the condition of loamy sand increased with the increase of fertil-izer application.The error of the TDR sensor under the condition of silty loam decreased first and then in-creased sharply with the increase of fertilizer amount.Under the condition of silty clay loam,the error of the TDR sensor increased first,then decreased and then increased with the increase of fertilization amount.A multivariate prediction model was established for the output value of TDR soil moisture sensor under experi-mental conditions,which was then calibrated by logistic model.The average absolute errors after calibration were-0.18%,1.46%,and 0.01%,respectively.This indicates that considering changes in fertilization and moisture content is conducive to improving the measurement accuracy of TDR sensors.关键词
施肥/TDR土壤水分传感器/测量误差/标定模型/土壤含水率Key words
fertilization/TDR soil moisture sensor/measurement error/calibration model/soil moisture content分类
农业科技引用本文复制引用
陈杏子,洪明,高瑞,景彦强,肖键,李杭..施肥对TDR土壤水分传感器测量精度的影响研究[J].水资源与水工程学报,2024,35(3):217-224,8.基金项目
新疆自治区重点研发任务项目(2022B02011-1) （2022B02011-1）
新疆自治区重大科技专项(2020A01003-2) （2020A01003-2）
新疆水利科技专项资金项目(XSKJ-2023-18) （XSKJ-2023-18）
