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以‘龙冠’‘雷尼尔’‘大紫’‘红玛瑙’‘先锋’‘龙旭’‘红灯’等7个山西省晋中地区主栽甜樱桃品种为材料,采用花枝田间直采水培及低温处理后水培2种方法,分别采用≤7.2℃模型、0~7.2℃模型、犹他模型对其需冷量进行分析。结果表明:所有品种叶芽需冷量均低于花芽,甜樱桃需冷量研究应以花芽需冷量为准;在3种计算模型中,≤7.2℃模型需冷量数值年际间差异最大,犹他模型需冷量数值年际间差异次之,0~7.2℃模型需冷量数值年际间差异最小;初步选用0~7.2℃模型计算7个甜樱桃品种需冷量:‘龙旭’386 h,‘龙冠’‘雷尼尔’428 h,‘大紫’‘红玛瑙’466 h,‘先锋’481 h,‘红灯’493 h。
Seven sweet cherry varieties were planted in the Jinzhong region of Shanxi Province, including Longyan, Rainier, Big Purple, Onyx, Pioneer, Longxu and Red Light. Hydroponics and low temperature treatment after hydroponics two methods, respectively, ≤7.2 ℃ model, 0 ~ 7.2 ℃ model, Utah model to analyze the required cooling capacity. The results showed that the cold storage capacity of leaf buds of all varieties was lower than that of flower buds. The cold storage capacity of sweet cherry should be determined by the cooling capacity of buds. In the three calculation models, The difference between the values of required cooling capacity in the Utah model is second to the interdecadal difference, and the difference between the values of required cooling capacity in the 0 ~ 7.2 ℃ model is the smallest in the interannual years. The 0 ~ 7.2 ℃ model is used to calculate the required cooling capacity of 7 sweet cherry varieties: h, ’Dragon’s crown’ ’Rainier’ 428 h, ’Big Purple’ ’Onyx’ 466 h, ’Pioneer’ 481 h, ’Red Light’ 493 h.