CAJ | 학술논문

不同温度下测量得到的土壤电阻率需要进行温度修正。目前土壤电阻率或电导率的温度修正模型主要建立在土壤浸出液或电解质溶液的实验基础上,但仍被广泛应用于实际土壤的电阻率或电导率温度修正,这些模型对于不同土壤的应用效果及模型适应性值得研究。为此选取了珠三角地区具有代表性的砂土、砂粉土、粉土、粉壤土、粘壤土等5种不同质地各3种土壤样品,采用四极法布置的Miller soil box土壤电阻率测试箱,运用交流伏安法进行了5～45°C范围的土壤电阻率温度特性实验,结果表明目前大多基于土壤浸出液或电解质溶液提出的土壤电阻率温度修正模型对实际土壤数据的修正效果不理想。采用非线性回归分析方法分别针对5种土壤建立了4种形式的电阻率温度修正模型,结果表明,乘幂模型不适合在5～45°C的宽温度范围进行电阻率修正,建立的比率模型、指数模型和多项式模型对土壤电阻率温度修正效果较好。在此基础上建立了针对不同土壤的统一温度修正模型。
불동온도하측량득도적토양전조솔수요진행온도수정。목전토양전조솔혹전도솔적온도수정모형주요건립재토양침출액혹전해질용액적실험기출상,단잉피엄범응용우실제토양적전조솔혹전도솔온도수정,저사모형대우불동토양적응용효과급모형괄응성치득연구。위차선취료주삼각지구구유대표성적사토、사분토、분토、분양토、점양토등5충불동질지각3충토양양품,채용사겁법포치적Miller soil box토양전조솔측시상,운용교류복안법진행료5～45°C범위적토양전조솔온도특성실험,결과표명목전대다기우토양침출액혹전해질용액제출적토양전조솔온도수정모형대실제토양수거적수정효과불이상。채용비선성회귀분석방법분별침대5충토양건립료4충형식적전조솔온도수정모형,결과표명,승멱모형불괄합재5～45°C적관온도범위진행전조솔수정,건립적비솔모형、지수모형화다항식모형대토양전조솔온도수정효과교호。재차기출상건립료침대불동토양적통일온도수정모형。
The effect of temperature on the experimental data of soil electrical resistivity should be corrected using temperature correction models.Most of the existing temperature correction models have been developed from the measurements on the soil solution extracts or electrolyte solutions,but are also widely used on soils.The application of these models in soils with different textures may be questioned.Five types of soils with different textures in Pearl River Delta,including sandy soil,silty sand,silt,silty loam,and clay loam,are obtained to investigate the influence of temperature on soil electrical resistivity.The temperature varies from 5 to 45 °C,and the soil electrical resistivity is measured by the AC voltammetry method in Miller soil box with four-electrode configuration.Our study shows that most of the existing models,parameterized from data on soil solution extracts or electrolyte solutions,have limits of validity on the results of our laboratory experiments on soil samples.From our experimental data,four types of temperature correction models,of which the parameters depend on the soil textures,are determined at first by nonlinear regression analysis.However,the power function model is not proposed here since it is not suitable to describe the relationship between the soil resistivity and the temperature in the wide range of 5 to 45 °C.Then the uniform forms of the ratio model,exponential model and polynomial model independent of soil textures are developed and perform well on the soil data.