在毛主席“以粮为纲,全面发展”的方针指引下,我省果树事业有了很大发展。目前全省已有果树四十万亩,七百五十万株。但是,现有结果树三百五十万株,年产水果仅有三万多吨,平均单株产量不足十八斤。因此,如何提高现有苹果大树的产量就成为生产上迫切需要解决的问题。 Guided by the principle of “taking grain as the key link and all-round development” of Chairman Mao, great achievements have been made in the development of fruit trees in our province. At present, the province has 40 million mu of fruit trees and 7.5 million trees. However, the existing result tree is 3.5 million trees, with an annual output of just over 30,000 tons of fruit and an average yield of less than 18 kilograms per plant. Therefore, how to increase the output of the existing large apple tree has become an urgent problem to be solved in production.