几个油桃品种需冷量的研究

采用河北顺平露地栽培油桃早红珠、曙光与瑞光5号枝条为试材,比较了不同低温累积量下的萌芽率,并采用7.2℃低温模型和犹他模型对3个品种的需冷量进行估算。结果表明:瑞光5号的需冷量最高,花芽与叶芽分别为7607、00 h;曙光需冷量最低,花芽与叶芽均为640 h;早红珠介于二者之间,花芽与叶芽需冷量分别为7006、40 h;同一品种需冷量年际间差异不大;通过对7.2℃低温模型和犹他模型作比较,发现在该地区7.2℃低温模型更适合。

Study on Buds Chilling Requirements of Several Nectarine Cultivars

The chilling requirements of 3 nectarine cultivars including Zaohongzhu,Shuguang and Ruiguang 5 were studied by germinating rate of branches in Shunping of Hebei Province.The 7.2℃ model and Utah model were used to calculate the accumulation of the chilling requirements.The result Showed that Ruiguang 5 possessed the highest chilling requirement that the floral bud and the vegetative buds were 760 h and 700 h;Shuguang was the lowest that both the floral bud and the vegetative buds were 640 h;Zaohongzhu was between the former two cultivars,the floral bud and the vegetative buds were 700 h and 640 h.Moreover,the same cultivar had similar chilling requirements between different years.This experiment indicated that 7.2℃ model was more suitable than Utah model in measuring the chilling requirement in this area.