摘要
通过 1986～ 2 0 0 1年对 4 5 0余份桃品种需冷量的 7 2℃模式、 0～ 7 2℃模式 (不包括 0℃ )和犹它模式比较分析 ,归纳出桃品种需冷量的评价模式为 :以秋季日平均温度稳定低于 7 2℃的日期为需冷量测定的起点 ,以 0～ 7 2℃累积低温值作为需冷量的评价标准比较适宜 ;犹它模式在中需冷量和长需冷量范围内能有效预测休眠的结束 ,而不适宜低需冷量品种的测定 ;7 2℃模式不适宜作为需冷量的评价模式。品种的需冷量与叶芽开放和始花期的相关系数分别为 0 5 2和 0 5 8,均达到极显著水平。
7.2℃、0-7.2℃and Utah model were used as estimation of the chilling requirement of more 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 effective chilling accumulation,0-7 2℃ model could be suitable for predicating effectively rest completion;Utah model performed accurately in normal and long chilling requirement;but 7 2℃ model was ineffective.The correlation coefficient of chilling requirement with leaf bud breaking and initial blooming,were 0 52 and 0 58 respectively,both of them reached significant levels.Reference peach cultivars for chilling requirement determining were given.
出处
《园艺学报》
CAS
CSCD
北大核心
2003年第4期379-383,共5页
Acta Horticulturae Sinica
基金
国家 8 63计划项目 (2 0 0 1AA2 470 41)
国家科技攻关项目 (75 0 1 0 2 11
85 0 1 0 3 0 9
95 0 14 0 1 0 5 )
