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本文用气体交换法研究柞蚕林3个主要组成树种苗期的几个基本光合特性。蒙古栎具有较高的光补偿点,光饱和点及最大光合速率,但其量子光合效率较低,表明蒙古栎能比较有效地利用高强度的太阳辐射,而对弱光能利用效率较低;麻栎则相反;辽东栎既有较高的光饱和点及最大光合速率,同时又有较高的量子光合效率及较低的光补偿点,因而对高强度和低强度的光能利用效率都比较高。而且证明3个树种光合作用光响应模型以一种指数形式的方程最合理。我们还考察了辽东栎和麻栎在生长季不同时期光合特性的差异以及温度对3个树种光合特性的影响。
In this paper, gas exchange method was used to study the basic photosynthetic characteristics of seedlings of three major species of tussah. Quercus mongolica has a higher light compensation point, light saturation point and maximum photosynthetic rate, but its quantum photosynthetic efficiency is lower, indicating that Quercus mongolica can utilize high intensity solar radiation more effectively and less efficient use of weak light energy. Quercus acutissima on the contrary; Quercus liaotungensis has higher light saturation point and maximum photosynthetic rate, and higher quantum yield and lower light compensation point, so both high intensity and low intensity of light energy use efficiency Higher. Moreover, it is proved that the photosynthesis photoresponse model of three tree species is most reasonable in an exponential form. We also examined the differences in photosynthetic characteristics of Quercus liaotungensis and Quercus acutissima at different growth seasons and the effects of temperature on the photosynthetic characteristics of the three tree species.