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1975—1976年冬,成都平原出现了近几十年罕见的低温霜冻,夏橙遭到严重冻害,损失很大。为了总结经验教训,提供发展夏橙生产的科学依据,我们于1975—1979年间对金堂、蒲江两县夏橙冻害进行了调查研究,现将有关问题分述于下。一、夏橙的冻害 (一) 冻害的评级标准:鉴定夏橙受冻程度,特别是果实冻害程度,对生产、销售有一定实践意义。我们根据夏橙植株不同器官受冻的形态特征、果实风味、树势变化,结合历年冻害的轻重,参考早、中熟柑桔品种冻害分级法,初拟四级标准,每级按不同
In the winter of 1975-1976, rare low-temperature frosts occurred in the Chengdu Plain in recent decades. Summer orange was severely frostbite and suffered heavy losses. In order to summarize the experiences and lessons and provide the scientific basis for the development of summer orange production, we conducted a survey on summer orange frost damage in Jintang and Pujiang counties from 1975 to 1979, and the relevant issues are summarized below. First, the summer orange frost damage (a) frost damage rating criteria: Identify summer orange frozen degree, especially fruit frost damage degree, the production and sale of a certain practical significance. According to the morphological characteristics of frozen plants of different summer orange plants, the changes of fruit flavor and tree vigor and the severity of frost damage over the years, reference is made to the classification of frost damage of early and mid-ripe citrus varieties,