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研究了柑桔花期、幼果期的异常高温胁迫对柑桔叶片光合速率的影响。受异常高温的突然袭击后，柑桔叶的光合速率迅速大幅度下降。较高的大气相对湿度能很大程度上抵消短期高温的效应，但对较长时间的高温作用不大。高温对叶光合速率的影响，短期内主要通过气孔限制ＣＯ２供应量来实现，随后较长时间内主要通过抑制叶肉细胞的光合活性来实现、经较长高热环境的影响后，叶片的光合速率会产生适应性的恢复，使光饱和点、光补偿点、最适温度及适宜温度范围等产生明显的变化。
The effects of abnormal high temperature stress on the leaf photosynthetic rate of citrus during the flowering and young fruit stages of citrus were studied. After a sudden attack by unusually high temperature, the photosynthetic rate of citrus leaves decreased rapidly and rapidly. Relatively high atmospheric humidity can largely offset the effect of short-term high temperature, but not for a long time the high temperature. The effect of high temperature on leaf photosynthetic rate was mainly achieved by limiting the supply of CO2 by stomata in the short term, followed by the inhibition of photosynthetic activity of mesophyll cells for a longer period of time. After a long period of hyperthermia, the photosynthetic rate Resulting in adaptive recovery, the light saturation point, the light compensation point, the optimum temperature and temperature range and other significant changes.