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土壤温度是森林气候的重要因素,与植物的生长关系密切。不同坡度和坡向的林分,光照条件的差异使林内的土壤温度和土壤热通量发生相应的变化。为研究试验区不同林分水热平衡规律,本试验监测了林木生长季土壤和大气温度。结果表明:整个生长季的平均地温林外>阳坡>阴坡,6-10月不同土层温度的变化规律是先下降后上升;土壤不同土层间温度极差值随气温的增高而减小;土壤容积比热容和土壤体积含水量呈直线型递增关系;表层土壤典型天气土壤热通量日变化规律总体趋势一致,呈单峰曲线,变化幅度晴天>阴天、林外>林内,随着气温的降低,土壤热通量的交换由表层向下传导转变为由下层向地表传导,土壤热通量值逐渐降为负值,阴天的降幅较大。
Soil temperature is an important factor in the forest climate, and plant growth are closely related. Different slopes and slopes of the stand, the differences in light conditions so that the forest soil temperature and soil heat flux corresponding changes. In order to study the law of water and heat balance in different stands in the experimental area, the experiment monitored the soil and atmospheric temperature in the growing season. The results showed that the average temperature outside the forest during the growing season was> sunny slope> shady slope, and the variation of temperature in different soil layers from June to October was the first to decrease and then increase. The temperature difference between different soil layers decreased with the increase of air temperature And the soil heat capacity and soil volumetric water content showed a linear increasing relationship. The daily variation pattern of soil heat flux in the typical soil surface topsoil showed the same tendency with a single peak curve, the change range of sunny day was cloudy, the forest was outside the forest, As the air temperature decreases, the exchange of soil heat flux transforms from the surface downward to the surface conduction from the lower layer, the soil heat flux gradually decreases to a negative value, and the cloudy declines greatly.