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本文报道了在小麦籽粒灌浆期用水喷雾提高叶片光合速率与单位面积产量的结果.光合速率的提高与叶片气孔阻力降低有关.研究进一步证实了华北地区小麦灌浆期光合作用有明显的“午睡”现象,这种现象与中午前后颇低的空气湿度和较高的空气温度引起的大气饱和差增加有很大关系,并且表明用少量喷水可以改善田间小气候和作物水分状况,减轻光合作用“午睡”现象,提高光合速率,进而增加作物产量.
In this paper, the results of spraying water on the photosynthesis rate and yield per unit area of wheat leaf during grain filling stage were reported.The increase of photosynthetic rate was related to the decrease of leaf stomatal resistance.The study further confirmed that there was a significant “nap” phenomenon in the photosynthesis of wheat in the grain filling stage in North China This phenomenon is closely related to the low air humidity before and after noon and the increase of atmospheric saturation caused by high air temperature. It also shows that using a small amount of water spray can improve field microclimate and crop water condition and reduce photosynthesis. Phenomenon, increase photosynthetic rate, thereby increasing crop yield.