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在年生长期中测定了龙眼叶片光合作用对温度的响应。结果发现，龙眼光合作用最适温与最适温下的光饱和光合速率都有一定的季节变化，但季节变幅不大；不同季节的光合最适温在２２～２８℃之间，光合最适温与植株前５～１０天所处的环境平均气温密切相关；春秋季光合最适温明显高于环境气温，夏季光合最适温明显低于环境气温；光合最适温随光照强度的变化而变化。这些结果显示了龙眼光合作用对环境温度的特殊要求。
The photosynthesis response of longan leaves to temperature was measured in annual growth. The results showed that there was a seasonal change in photosynthetic light-saturated photosynthetic rate of the longan at the optimum temperature and the optimum temperature, but the seasonal variation was insignificant; the optimum temperature of photosynthesis in different seasons was between 22 and 28 ℃, photosynthesis The optimum temperature was closely related to the average temperature of the environment in the first 5 to 10 days of the plant. The optimum temperature for photosynthesis in spring and autumn was significantly higher than the ambient temperature, and the optimum temperature for summer photosynthesis was significantly lower than the ambient temperature. Change and change. These results show the special requirements of the longan photosynthesis on the ambient temperature.