THE EFFECTS OF SPRAYING ON THE PHOTOSYN-THESIS AND THE GRAIN YIELD OF WHEAT

doi:10.3321/j.issn:1000-7091.1987.02.003

Abstract

Abstract: The results of increasing the photosynthetic rate of wheat leaves and the yield of unit area sprayed with water during grain - filling period were reported in the paper. The increase in photosyhthetic rate is related to the decrease in stomatal resistanceof wheat leaves. This experiment futher confirmed that the " afternoon nap " phenomenon is obviously shown by the photosynthesis during grain filling period in north China region. This phenomenon is quite related to the increase in atmospheric saturation deficency under the lowerair humidity and the higherair temperature before and after noon. It indicated that the microclimate in the field and the moisture condition of crops could be improved by spraying littile water, lighten the midday deppression of photosynthesis, and increase the photosynthetic rate, thus increasing the crop yield.

Key words: Wheat, Photosynthesis, Spray

Xu Dapuan Li Deyao, Shen Yungang, Yan Jiyao, Zhang Yuangen, Zheng Yousan. THE EFFECTS OF SPRAYING ON THE PHOTOSYN-THESIS AND THE GRAIN YIELD OF WHEAT[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1987, 2(2): 19-24. doi: 10.3321/j.issn:1000-7091.1987.02.003.

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