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对大磨盘柿树光合作用特性研究结果表明,1.光补偿点为1.5klx,光饱和点为65klx,达光饱和点以后,随光照强度的增加光合强度缓慢下降。2.光合最适温度为25℃左右。3.光合强度的日变化呈“中午降低型”的双峰曲线变化,最大峰值出现在上午10时,次峰值出现在下午6时左右。4.光合强度的年周期变化为3峰曲线,3个高峰分别出现在5月中旬、7月中旬和9月中旬;果实对其附近叶片光合强度的提高有促进作用。5.新稍不同节位的叶片光合强度存在差异,6月初,中部叶片>顶部叶片>下部叶片,7月上旬,顶部叶片>中部叶片>下部叶片。
The results of the photosynthesis of persimmon tree showed that: 1.The light compensation point was 1.5klx and the light saturation point was 65klx. After the light saturation point, the photosynthetic intensity decreased slowly with the light intensity increasing. 2. Photosynthetic optimum temperature is about 25 ℃. The diurnal changes of photosynthetic intensity showed a “noon” type of bimodal curve changes, the maximum peak appeared at 10 o’clock in the afternoon, the second peak appeared at about 6 pm. The annual variation of photosynthetic rate was a 3-peak curve, and the three peaks appeared in mid-May, mid-July and mid-September, respectively. The fruits promoted the increase of photosynthetic intensity in the leaves near them. In the beginning of June, the middle leaves> the top leaves> the bottom leaves, and the top leaves> the middle leaves> the bottom leaves in early July.