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苹果树是多年生植物,生命周期长,老树更新是栽培中不可缺少的一个环节。而本文所指的是对那些因疏于管理而造成树体未老先衰的果园的改造而言,它与正常的老园更新不尽相同。一、现有果园改造的迫切性我市现有苹果树763万余株,其中结果树465万株,近几年在总株数增加50万株,结果树增加15万株的情况下,其产量在370万担上下波动,低于1978年400万担的水平。出现了“只见株数岁岁增,不见产量年年升”的局
Apple tree is a perennial, long life cycle, regeneration of old trees is an indispensable part of cultivation. What this article refers to is that it is different from the normal old-style garden renewal for the transformation of the orchard, which was caused by neglect management. First, the urgency of the transformation of the existing orchard There are 7630000 apple trees in our city, of which 4650000 trees result, in recent years in the total number of plants increased 500000, the results of an increase of 150,000 trees, its output Fluctuating at 3.7 million and below the level of 4 million in 1978. Appear “only see the number of strains increased year by year, but not see the production year after year” Bureau