桃需冷量和需热量估算模型在桂林地区的适用性研究

Applicability of estimation models for peach chilling and heat requirements in Guilin area

为了评价不同需冷量和需热量估算模型对桂林地区桃的适用性,利用2种需冷量模型和2种需热量模型对28个桃品种2017—2021年不同年度的需冷量和需热量进行估算,分析比较各模型估算结果的年际变异系数。结果表明,在桂林地区,7.2℃模型和犹它模型估算的桃花芽需冷量变异系数平均值分别为27.6%和24.1%,适用性较差;生长度时数模型和有效积温模型估算桃花芽需热量的变异系数平均值分别为19.1%和19.6%,适用性较差;需冷量和需热量之间不存在显著相关关系。

Two models of chilling requirements and two models of heat requirements were used to estimate the chilling and heat requirements of 28 different peach varieties in 2017 to 2021.The inter-annual relative standard deviation(RSD)of the estimation results of each model was analyzed to evaluate the applicability of different estimate models for peach chilling and heat requirements in Guilin area.The results showed that the average RSD of floral bud chilling requirement of peach estimated by 7.2℃ model and Utah model were 27.6%and 24.1%,respectively,showing poor applicability.The average RSD of floral bud heat requirement of peach estimated by growing degree hours model and effective accumulated temperature model were 19.1%and 19.6%,respectively,with poor applicability.There was no significant correlation between chilling and heat requirements.