不同梨品种需冷量研究

Study on Chilling Requirement of Different Pear Cultivars

以6个梨品种金水1号、安农1号、金水2号、早酥、鄂梨2号、鄂梨1号为材料,分别采用≤7.2℃模型、0~7.2℃模型、犹他模型研究其需冷量。结果表明：采用3种模型评价,不同品种叶芽的需冷量存在显著差异;同一品种之间的叶芽需冷量应用≤7.2℃模型和犹他模型评价的结果较为接近。金水1号、安农1号、金水2号、早酥、鄂梨2号、鄂梨1号6个品种叶芽的需冷量分别为383 h、440 h、543 h、645 h、733 h、1 034 h,腋花芽的需冷量分别为383 h、440 h、440 h、645 h、733 h、1 034 h,金水2号腋花芽需冷量低于叶芽主要是其萌芽期要早于叶芽。

≤7.2℃,0-7.2℃ and Utah model were used as estimation of the chilling requirement of 6 pear varieties-Jinshui 1,Annong1,Jinshui2,Zaosu,Eli 1 and Eli 2.The results showed that：the bud chilling requirements of different pear varieties,which were estimated by ≤7.2℃,0-7.2℃ and Utah model,were significant different;the bud chilling requirements of the same variety estimated by ≤7.2℃ and Utah model were approximate;the chilling requirement of bud of the varietie Jinshui 1,Annong 1,Jinshui 2,Zaosu,Eli 1 and Eli 2 were 383h,440h,543h,645h,733h,1034h（≤7.2℃ chilling model）,and the chilling requirement of flower bud were 383h,440h,440h,645h,733h,1034h,respectively.