研究了气候因子对幼龄欧洲山毛榉(Fagus sylvatica)光合速率日变化的影响、光合作用能力、光—光合作用曲线和在不同辐射条件下净光合速率的温度效应。结果表明:气候因子对净光合速率有较大影响;辐射、温度、相对湿度对光合作用能力的影响作用系数分别为:0.51、0.22和0.17;光-光合作用曲线是Y=1.49273-1.58993×0.09328~(0.01X);自然条件下光合速率的最佳环境条件组合是:辐射大于45μE·m~(-2)·s~(-1),温度在10℃到20℃之间。 The effects of climatic factors on the diurnal variation of photosynthetic rate of young European Fagus sylvatica were studied. The photosynthesis ability, photosynthesis curve and temperature effect of net photosynthesis rate under different radiation conditions were studied. The results showed that climatic factors had a significant effect on net photosynthetic rate. The effect coefficients of radiation, temperature and relative humidity on photosynthesis ability were 0.51, 0.22 and 0.17, respectively. The light-photosynthesis curve was Y = 1.49273-1.58993 × 0.09328 ~ (0.01X). The optimum combination of photosynthetic rate under natural conditions is that the radiation is more than 45μE · m -2 s -1 and the temperature is between 10 ℃ and 20 ℃.