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2008—2010年连续3年,分别采用0～7.2℃模型、≤7.2℃模型和犹他模型估算四川省成都地区早熟梨品种翠冠和爱甘水的需冷量。结果表明,采用3种模型估算的2个早熟梨品种不同年际间需冷量差异较大;相同模型下,估算爱甘水需冷量数值大于翠冠;在四川省成都地区,适宜选择犹他模型估算2个早熟梨品种需冷量,估算的数值在年际间差异较小,翠冠顶花芽和叶芽需冷量分别为716～952、696～782 C.U,爱甘水顶花芽和叶芽需冷量分别为869～952、831～952 C.U,2个梨品种自然休眠结束期在1月3—17日。建议四川省成都地区翠冠和爱甘水梨设施栽培时,扣棚时间为1月上旬至中旬。
2008-2010 for three consecutive years, respectively, using 0 ~ 7.2 ℃ model, ≤ 7.2 ℃ model and Utah model to estimate the early maturing pear variety Cui Guan and love water in Chengdu, Sichuan Province. The results showed that there were significant differences in the annual chilling requirements between the two cultivars of pear cultivars estimated by the three models. Under the same model, the estimated chilled water requirement was greater than that of Cui Guan. In the Chengdu area of Sichuan Province, Utah The model estimated the cold-tolerance of two mature pear cultivars. The estimated values differed little in the interannual years. The top cooling and bud cooling requirements of Cui crown were 716-952 and 696-782 CU, respectively. The cooling capacity was 869 ~ 952 and 831 ~ 952 CU, respectively. The end of the natural dormancy of 2 pear cultivars was from January 3 to January 17. It is suggested that during the cultivation of Cui Guan and Ai Gan Pear cultivated in Chengdu, Sichuan Province, the period of deduction should be from early January to mid-January.