【作者】 刘天明； 张振文； 李华； 任仲博； 周存田；

【Author】 Liu Tianming, Zhang Zhenwen, Li Hua, Ren Zhongbo, and Zhou Cuntian (Department of Horticulture, Northwest Agricultural University, Wangling, 712100)

【机构】 西北农业大学园艺系；

【摘要】 用电导法、萌芽生长法和组织变褐法对82个桃品种及其优系的耐寒性评价结果表明:桃1年生休眠枝的耐寒温度为-19．0--27．0℃,叶芽为-18．5--26．1℃,花芽为-17．0 --24.0℃;枝、叶芽和花芽彼此间耐寒性呈显著正相关,其抗性强弱的顺序为枝>叶芽>花芽; 枝组织的耐寒力顺序为韧皮部>木质部>形成层>髓;品种间、品种群间及变种间抗寒性也有不同程度的差异。提出以很少发生-23．0℃以下低温的地区为桃适宜经济栽培区。更多还原

【Abstract】 The hardiness of 82 peach cutivars and strains was determined by electronic conductivity, bud break and shoot ?tissue browning evaluation methods with excised dormant shoots. The results showed that the tolerance of low temperature of shoot - tissue, vegetative and floral buds was - 19.0- - 27. 0℃, - 18. 5- - 26.1℃, and - 17. 0- - 24. 0℃ , respectively. There were significantly positive relationships in the tolerance among shoots, vegetative buds, floral buds. The order of hardiness was: shoots > vegetative buds > floral buds; the order of hardiness within shoot was: phloem>xylem>cambiurn > pith, while there were differences in cold hardiness among different cultivars, groups and varieties.更多还原