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地温是森林气候重要的环境因素之一,与植物生长密切相关,对地温的深入研究有助于揭示森林生态系统功能和评估森林环境效益。本文利用哀牢山亚热带常绿阔叶林林内和林外旷地(气象站)地温数据,分析发现:哀牢山亚热带常绿阔叶林林内外的地温均呈单峰型日变化,与林外相比,林内地温具有明显日变化的深度较浅(仅在20cm深度以上);林内平均地温具有显著日变化的深度在春季和秋季(20cm)要大于夏季和冬季(15cm);与林外相比,林内各层地温均小于同层的林外地温,并且林内地温的日变幅和年变幅也小于同深度的林外地温。总体来看,林外地温的年变幅和日变幅大于林内。
Ground temperature is one of the most important environmental factors in forest climate. It is closely related to plant growth. Further study of ground temperature can help reveal the function of forest ecosystem and evaluate the benefits of forest environment. In this paper, Ailao Mountain subtropical evergreen broad-leaved forest in the forest and open land (meteorological station) ground temperature data analysis: Ailao Mountain subtropical evergreen broad-leaved forest both inside and outside the ground temperature showed a single peak diurnal variation, compared with the outside , The depth of the ground temperature in the forest was significantly lower than that of the depth (only above the depth of 20cm); the depth of the mean daily temperature had significant diurnal variation in spring and autumn (20cm) than in summer and winter (15cm) The ground temperature in each layer was less than that in the same layer, and the daily amplitude and annual variation of ground temperature in the forest were also less than those at the same depth. In general, the annual variation and daily variation of the warmth in the forest are larger than those in the forest.