【摘要】 本文报道了用小麦作材料,从作物生理生态特性方面研究了小麦光合作用午休的原因。试验结果证明:在中午前后,小麦叶片气孔开关数目与光合作用午休密切相关;大部分小麦光合作用午休与生物节律无关;中午遮光后,光合作用加强和生物学产量提高,说明光合产物的累积是形成光合作用午休的重要因素之一。更多还原

【Abstract】 This experiment was carried out to study the causes for "midnap" of wheat, i.e. photosynthetic rate decrease of wheat at midday. The main results are as follows: before or after noon, close number of the stomata in the flag leaf of wheat with the photosynthetic rate decrease is intimate interrelated; photosynthetic endogenous rhythm has nothing to do with photosynthetic rate decrese for the "midnap"; a short shading at midday improves photosynthesis and increases the biological yield.It indicates that the photosynthate accumulation seem to be one of the important factor for the photosynthetic rate decrease of wheat at midday.更多还原