基于温度-伤害度关系分析酿酒葡萄根系及芽抗寒性

采用差热分析系统(DTA)对8个主栽酿酒葡萄品种的芽和根系进行低温放热分析(LTE),建立各品种芽、根系韧皮部及木质部的温度-伤害度(LT-I)回归方程,评估不同品种的根系及芽抗寒性.结果表明： 8个品种的根系韧皮部伤害度50%的温度从高到低为马瑟兰>品丽珠>赤霞珠>小芒森>霞多丽>蛇龙珠>贵人香>熊岳白;不同品种木质部伤害度50%的温度从高到低为马瑟兰>霞多丽>赤霞珠>小芒森>品丽珠>蛇龙珠>贵人香>熊岳白;芽伤害度50%的温度从高到低为赤霞珠>小芒森>蛇龙珠>品丽珠>霞多丽>贵人香>马瑟兰>熊岳白.利用模糊隶属函数值法综合评价根系及芽的抗寒性,马瑟兰根系的抗寒性最差,熊岳白根系的抗寒性最好;赤霞珠、品丽珠、小芒森和蛇龙珠芽的抗寒性最差,贵人香和熊岳白芽的抗寒性最好.

Evaluation of root and bud cold hardiness of wine grape varieties based on temperature injury relation.

A system for differential thermal analysis (DTA) was applied for low temperature exotherms (LTE) analysis of roots and buds of eight wine grape varieties, and the temperature injury (LT-I) regression functions of buds, phloem and xylem of roots were established to evaluate the cold hardiness of roots and buds of the different varieties. The order of phloem 50% lethal temperature of the eight grapevines was Marselan > Cabernet Franc > Cabernet Sauvignon > Petit Manseng > Chardonnay > Cabernet Gernischt > Italian Riesling > Xiongyuebai. The xylem 50% lethal temperature of the different cultivars was in the order of Marselan > Chardonnay > Cabernet Sauvignon > Petit Manseng > Cabernet Franc > Cabernet Gernischt > Italian Riesling > Xiongyuebai. The order of bud 50% lethal temperature was Cabernet Sauvignon > Petit Manseng > Cabernet Gernischt > Cabernet Franc > Chardonnay > Italian Riesling > Marselan > Xiongyuebai. A comprehensive evaluation on cold hardiness of the different varieties was conducted by fuzzy membership function. For roots, Marselan was the poorest, and Xiongyuebai was the best. For buds, Cabernet Sauvignon, Cabernet Franc, Petit Manseng and Cabernet Gernischt were poorer, while Italian Riesling and Xiongyuebai were better.