中文摘要：

自然条件下采用美国产Li-6400便携式光合测定系统，对南方岩溶峰丛山区的金银花、枇杷、芒果和荔枝4种植物的光合、蒸腾和水分利用效率及与各种环境因子的相关性进行了测定分析，以揭示各种植物的生理特性，为岩溶区植被恢复提供一些理论依据．结果表明：金银花的光合、蒸腾速率和水分利用效率是4种植物中最高的，其光合、蒸腾曲线呈双峰型，具有“午睡”现象；枇杷的光合、蒸腾速率在上午12：00达到最大值，其蒸腾是4种植物中受水分影响最大的：芒果的光合、蒸腾在下午14：00达到最大值，受气孔限制；荔枝的光合、蒸腾是4种植物中最低的．因此，金银花的水分消耗较大，需进行水肥管理，但其根系发达，可以防止土壤侵蚀；枇杷需水量大，不适合种植于干旱的岩溶区；芒果适合种植在光照强度偏弱的地方；荔枝与各因子的相关性都很小，还有待进一步研究。

英文摘要：

This paper is to analyze the photosynthesis,transpiration,water use efficiency （WUE）,and some relativities to environmental factors of Jinyinhua,loquat,mango and litchi in South Karst Mountain Area,so to indicate the physiological characters of the four plants, to provide some theory of vegetation restoration.The results show that Jinyinhua＇s photosynthesis,transpiration,water use efficiency are the highest in the four plants,the curves of photosynthesis and transpiration is two-peak pattern, it is＂midday nap＂ ; loquat＇s photosynthesis and transpiration reaches the maximum value at 12：00,its＇ transpiration is mostly affected by water ; mango＇s photosynthesis and transpiration reaches the maximum value at 14：00 and is limited by stomata;litichi＇s photosynthesis and transpiration is the lowest. Therefor,Jinyinhua consumes a lot of water and need more cultivation,but its root system is huge and is good to be used to prevent soil erosion;loquat needs enough water so not to plant in dry karst region;mango is fit to plant in weak light place ;correlation of litichi＇s photosynthesis and transpiration with environmental factors is small, it must be further researched.