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通过对不同土壤大气湿度组合下玉米生长、水分及光合特性的研究，认为土壤水分亏缺对玉米的影响要超过大气干旱。玉米的水分状况及生理活性主要决定于土壤的水分条件。短期干旱使气干土干、气湿土干处理净光合速率下降的主要原因是非气孔限制，而气干土湿处理前期光合速率下降主要是由于气孔限制，后期则为非气孔限制。短期干旱过程中各处理的干物质仍持续增加
Through the study on the growth, water and photosynthesis of maize under different combinations of soil moisture, it is concluded that the effect of soil water deficit on maize should surpass that of the atmosphere. The water status and physiological activity of corn is mainly determined by the soil moisture conditions. Short-term drought makes dry-soil dry, wet-dry soil dry-treatment net photosynthetic rate decline is the main reason for non-stomatal limitations, and dry gas soil moisture treatment decreased photosynthetic rate was mainly due to stomatal limitations, the latter is non-stomatal limitations. Dry matter processed by each short-term drought continued to increase