山葡萄的抗寒能力很强,但也常受早春冻害。1986年勤得利农场遇上历年罕见的春冻,4月份气温回升很快,最高气温达28℃,致使山葡萄冬芽迅速萌发。但到5月中旬气温又急剧下降到-2.5℃,地表温度降到-6.5℃。根据多年的经验,该场23队的同志在30亩2年生葡萄园内采取下架埋土防冻的措施。 Mountain grape strong ability to cold, but also often suffer frost damage in early spring. In 1986 Qin Deli farm encounter rare spring over the years calendar, in April the temperature rose quickly, the maximum temperature of 28 ℃, resulting in rapid development of winter grape bud. But by mid-May the temperature dropped sharply to -2.5 ° C and the surface temperature dropped to -6.5 ° C. Based on many years of experience, the 23 team comrades in the 30-acre biennial vineyard to take shelter antifreeze measures.