Study on the Diurnal Variation of Water of P.aviumL.

Taking the same type of three-year-old P.aviumL.cultivars cv.‘Hongdeng'as material,the soil water content,stem velocity,leaf water potential and transpiration rate in the same environment were measured,the diurnal variation of water of same plant under different cultivation condition was studied.The results showed that the soil water content decreased both in the spatial distribution and vertical distribution.The daily variation of stem velocity was kurtosis of U-inverse.The daily variation of leaf water potential was of V-type.The diurnal change curves of transpiration rate were of the midday-depression type in sunny day.Correlation analysis showed that soil water content,stem velocity and leaf water potential had a remarkable correlation with transpiration rate.