【摘要】 为了建立湖南省土壤温度的估算模式,探明湖南省土壤温度的空间变异规律,以湖南省83个气象站点的地面气候数据为基础,拟合50 cm深度年均土壤温度与纬度、经度和海拔高度之间的相关关系,构建相应的土壤温度估算模型,并运用此模型对199个湖南省土壤系统分类采样点土壤温度进行估算,以确定各采样点的土壤温度状况,且依此建立湖南省土壤温度分布图。结果表明:建立的用以估计50 cm深度土壤温度的多元回归方程为:y=37.013-0.027×E-0.516×N-0.004×H (R~2=0.866,sig.=0.000)。运用此模型来估算湖南省的土壤温度,并确定土壤温度状况是完全可行的;除了海拔800 m以上区域存在年均土壤温度≤16℃(温性土壤温度状况),其余均>16℃(热性土壤温度状况)。此研究建立的湖南省土壤温度估算公式为湖南省土壤系统分类中土壤温度状况的确定提供了技术支撑,对建立全国土壤温度估算模型也可提供一定的参考。更多还原

【Abstract】 In order to establish the estimation formula of soil temperature and find out the spatial variation law of soil temperature in Hunan Province,this study is based on the ground climate data of 83 meteorological stations in Hunan Province,to prove the correlation between the annual average soil temperature at 50 cm depth and latitude,longitude and altitude variations.The correlation was carried out to construct a corresponding soil temperature estimation model.Then the model was used to estimate the soil temperature of 199 sampling points of soil taxonomy in Hunan Province,which determine the soil temperature regime of each sampling point.Based on this,the soil temperature distribution map of Hunan Province was established.The results show that the multivariate regression equation for estimating the annual average soil temperature at 50 cm depth is y=37.013-0.027×E-0.516×N-0.004×H (R~2=0.866 sig.=0.000).This model is feasible to estimate soil temperature and determine the soil temperature status in Hunan Province.In Hunan,except for some areas above 800 m above sea level of which the average annual soil temperature is ≤16℃ (temperate soil temperature status),the rest is>16℃ (thermal soil temperature status).The soil temperature estimation formula established in this study provides technical support for the determination of soil temperature status in soil taxonomy of Hunan Province as well as a reference for the establishment of the national soil temperature estimation model.更多还原