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依据田间实测资料，分析了南亚热带丘陵赤红壤-果树-大气连续体中的能量变化及其分布规律、结果表明，土壤基质势的年度变化特征说明南亚热带丘陵赤红壤存在明显的湿季和旱季．果树叶水势随土壤基质势、大气水势、气温及大气相对湿度的变化而变化，荔枝、龙眼叶水势的变化比芒果叶水势的变化大.以荔枝、芒果和龙眼作为供试植物，水分从土壤到达植物根表皮、进入根系并通过植物茎到达叶片，其能量降低分别约为0．9063～1.7428、0．2818～0．6979和0．2904～1．8707MPa；水分从叶部汽化扩散到大气中，其能量降低分别达15．1491～57．3669、15．4491～58．4036和14．5824～56．9536MPa，说明水流在南亚热带丘陵赤红壤-果树-大气连续体中运移时，其能量主要消耗在由叶部到大气这一环节上。
Based on the field data, the energy variations and their distribution in the red loam-fruit tree-atmosphere continuum of the southern subtropical hilly region were analyzed. The results show that the annual variation of soil matrix potential shows that there are obvious wet and dry seasons in the southern subtropical hilly red soil . The leaf water potential of fruit trees changed with the variation of soil matrix potential, atmospheric water potential, air temperature and atmospheric relative humidity, and the change of water potential of litchi and longan leaves was greater than that of mango leaf water.Using litchi, mango and longan as tested plants, Reaching the plant root epidermis, entering the root system and reaching the leaves through the plant stems, the energy reduction was about 0.9063 to 1.7428, 0.2818 to 0.6979 and 0.2904 to 1.8707 MPa, respectively; water vaporized from the leaf to the atmosphere , The energy loss of them is 15.1491 ~ 57.3669, 15.4491 ~ 58.4036 and 14.5824 ~ 56.9536MPa, respectively, indicating that when water flows in the red loam-fruit tree-atmosphere continuum in the south subtropical hilly region, Its energy is mainly consumed by the leaf to the atmosphere of this link.