Abstract: Zhengdan 958 and Nongda 364 were adopted in this experiment,water potential of husk leaves senescence for two different maize(Zea mays L.)genotypes were comparatively studied in the field condition,and the relation among the water potential and water saturation deficit were discussed as well.The results showed that:the same diurnal change trend of water potential in two different genotypes was basically the same parabola-form,diurnal average and change range of water potential in husk leaves of Zhengdan 958 were higher than that of Nongda 364;Water potential and relative water content of husk leaves were in the trend of reduction along with the growing of maize,the water reverse was ture for saturation deficit;Zhengdan 958 had a higher saturation deficit than Nongda 364,but had a relatively lower relative water content than that;It was shown linear relation between water potential and saturation deficit of husk leaves:Y=A+B X.The constant item in Zhengdan 958 are bigger than that in Nongda 364,which indicated that the former had a higher saturation deficit、relatively lower relative water content,than latter under normal water condition,Therefore,the drought-resistance of Zhengdan 958 was prior to Nongda 364.

Key words: Maize, Husk leaves, Water potential, Relative water content, Water saturation deficit

CLC Number: 

• S513.01