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J Integr Plant Biol, 1993, 35 (8): -, Research Article
A Study on the Relationship Between the Net Photosynthetic Rate of Young European Beech and Main Climatic Factors Under Natural Conditions
Zhang Xi-ming. W., Stickan and M. Runge
Young European beech lives under the blank of European beech mature forest. Its photosynthetic rate was significantly affected by climatic factors. This paper deals with the effect of climatic factors on diurnal variations of the net photosynthetic rate,photosynthetic capacity,lightphocosynthesis curve and temperature effect of net photosynthetic rate under different radiations. The results are as follows:the climatic factors have greater influence on diurnal variations of the net photosynthetic rate. The influence coefficient of radiation,temperature and relative humidity on photosynthetic capacity are 0. 51, 0. 22. and 0. 17,respectively. The light-photosynthesis curve is Y= 1. 49273–1. 58993 × 0. 09328(0.01x). The optimum combination of environmental conditions of photosynthetic rate under natural conditions is:the radiation is more than 45 μE · m-2 · s-1 and meantime the temperature is between 10℃ and 20℃.
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