土壤温度对于土壤一系列的物理、化学以及生物化学过程有重要作用，其变化特征及气象因素影响对改善红壤地区生态环境，提高土地利用率具有重要意义。在田间试验基础上，分析气温、降水、风速、相对湿度和日照时数等气象因子与不同土壤深度（10，20，40，80，100 cm）下的土壤温度的相关关系。结果表明：（1）土壤温度变化随土壤深度的增加趋于平缓；（2）不同作物地土壤温度在根系以上部分存在一定差异；（3）影响土壤温度的气象因子按影响程度排列分别为：日照时数、降水量、气温、水汽压、相对湿度、风速；（4）与土温相关关系显著的气温、水汽压、降水量、相对湿度和日照时数作为自变量来构建关于不同土层深度土温的多元线性回归方程，其决定系数均高于0．93。%Soil temperature has important function on a series of soil physical, chemical and biological chemical processes.The variation characteristics of soil temperature and meteorological factors are of great sig⁃nificance in improving ecological environment and the land utilization in red soil regions.Based on field experi⁃ment,this study analyzed the correlation between the meteorological factors of air temperature,precipitation, wind speed,relative humidity and sunshine hours etc.and the soil temperature at different soil depths(10,20, 40,80,100 cm).The results showed:1)The variation of soil temperature tended to be gentle with the increase of soil depth.2) There were some differences in the soil temperature under different crops above the root por⁃tion.3) The meteorological factors that affected the soil temperature,according to the influence degrees were in the order:sunshine hours,precipitation,air temperature,vapor pressure,relative humidity,wind speed.4)Taking air temperature,vapor pressure,precipitation,relative humidity and sunshine hours,which had significant correla⁃tions with soil temperature,as the independent variables multivariate linear regression equations of of soil temper⁃ature at different soil depths were established,the determination coefficient was higher than 0.93.
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