科尔沁沙地甸子地土壤蒸发的野外试验研究

Analysis of Soil Evaporation Based on the Data Measured in Horqin Sandyland

采用单因子相关分析、多元回归模拟和灰色关联分析方法研究了科尔沁沙地甸子地不同深度的土壤蒸发量与土壤温度、气温、湿度、风速、日照时数、地下水位埋深等因素的关系。结果表明:用线性方程或指数回归方程拟合土壤蒸发与其影响因素的相关关系,优于二次回归多项式或三次回归多项式。影响土壤蒸发的主要因子是土壤温度和大气温(湿)度,其次是风速和地下水位埋深,而日照时数对土壤蒸发的影响较小。

The paper studyed the correlation between soil evaporation in different depths and influencing factors of air,such as solar radiation,soil temperature,air temperature,wind speed,sunshining hours,etc,during the course of the evaporation of soil by taking the methods of single factor correlation analysis,multivariate regression and grey relational analysis.The results indicate that the analytic results of the single factor correlation analysis and the multivariate regression are congruous,meanwhile,the fitting results using linear regression and exponential regression equations are more better than using quadratic polynomial and cubic polynomial.The main factors which influence soil evaporation are soil temperature and air temperature,subordinate factors are wind speed and the depth of groundwater,and the influence of the hours of sunlight and relative humidity are very small.