在陕西关中大部地区,气候温暖,无霜期长,栽培葡萄冬季均不埋土防寒,即可安全越冬。但近年来所内葡萄园在春季常发现有老蔓干裂或新蔓死亡等现象,特别是在1976～1977年冬春之际,竟有大量品种的枝蔓整株死亡。同时在省内其他地区,如周至、宝鸡、渭北一带以及河南省的一些地区也均有发生,对此于1977年春天在所内对不同品 Most areas in Shaanxi Guanzhong have a warm climate and a long frost-free period. Winter grapes are not buried in cold so as to be safe for winter. However, in recent years, the vineyard in the spring often found in the old man-dry crack or death of the new phenomenon, especially in the winter and spring of 1976 to 1977, as many varieties as a whole tree died. At the same time, other areas in the province, such as Zhouzhi, Baoji, Weibei and some areas in Henan Province, have also occurred. In the spring of 1977,