关键词: 桃, 需冷量, 评价模式

Abstract: 7．2℃ 、0—7．2℃ and Utah model were used as estimation of the chilling requirement of mole than 450 peach varieties at Zhengzhou in Henan from 1986 to 2001．The results showed that： The date of average temperature in autumn equal to or lower than 7．2℃ was appropriate for the initial date of efective chilling accunlLi—lation，0—7．2℃ mod el could be suitable for predicating efectively rest completion；Utah model performed aCELI—
mtely in normal and long chilling requ irement； but 7．2℃ mod el Was inefective． The correlation coeficient of chilling requirement with leaf bud breaking an d initial blooming， were 0．52 an d 0．58 respectively， both of them reached significant levels．Reference pe ach cuhivam for chining requ irement determining were given．

Key words: Peach, Chilling requ irement, Estima ting mod elr