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根据定位系统观测资料，阐述了南亚热带山地常绿森林区、丘陵旱作区和平原水稻区多种土壤的温度变化与气温的关系。观测研究结果表明：低山常绿森林区温度的三维空间差异比丘陵区、平原区大，丘陵区又比平原区大；南亚热带林区的气温、地表温、30cm土温比中亚热带的高，比热带的低：南亚热带林区的谷地气温高于针叶林、混交林和阔叶林，谷地地表温低于针叶林而高于混交林和阔叶林，谷地20m土温低于针叶林、混交林而高于阔叶林；在气温一致的丘陵区栽植植物不同，其地表温、土温略有差异；在平原水稻土区，年气温、地表温、20cm土温差异不大，但30cm以下土温渐显差异；不同地貌单元的气温、地表温和土温的年际差异、年平均温度、各月及0～12～24时的温度动态变化各具特征。根据气温与植物生长的关系，拟把气温＞22℃的4～10月称热季、气温＜22℃的1～3月及11～12月称作凉季。可因地制宜，根据气温和土温的变化特征与土壤水分和作物生长的关系，采取措施调节温度，以利于作物生长。
According to the observation data of the positioning system, the relationship between the temperature change and the air temperature of various soils in the subtropical mountainous evergreen forest area, hilly farming area and plain rice area is described. The observation results show that the three-dimensional spatial variation of the temperature in the low mountain evergreen forest is larger than that in the hilly and plain areas and the hilly area is larger than that in the plain. The temperature, surface temperature, 30 cm soil temperature in the subtropical forest are higher than those in the subtropical high , Lower than that in the tropics. The temperature in the valley in the south subtropical zone is higher than that in the coniferous forest, mixed forest and broadleaf forest. The surface temperature in the valley is lower than that in coniferous forest and higher in mixed valley and broadleaf forest. Coniferous forest, mixed forest and higher than the broadleaf forest; in the same temperature in the hilly areas of different plants, the surface temperature, soil temperature slightly different; plain paddy area, annual temperature, surface temperature, 20cm soil temperature difference is not However, the soil temperature below 30cm is gradually different. The annual temperature difference, annual average temperature, temperature in each month and 0 ~ 12 ~ 24hours have different characteristics of temperature, surface temperature and temperature. According to the relationship between air temperature and plant growth, it is proposed that January-March and November-December with temperatures> 22 ° C be called cool season from April to October and hot season <22 ° C. According to local conditions, according to the changes of temperature and soil temperature and soil moisture and crop growth, take measures to adjust the temperature in order to facilitate crop growth.