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苹果树的产量主要取决于花芽的数量、座果率的高低和果实大小这三个因素。但就我省主栽品种国光而言,座果率高低并不是一个主要因素。而左右其产量的是花芽形成的多少和果实的大小这二个因素。我省的国光品种“大小年”结果现象很严重,“大年”时花芽过多,树体超载,果个小品质低劣;“小年”时花芽很少,产量极低。“大小年”结果必然造成产量不稳,质量低下,树势削弱。而形成“大小年”结果的主要原因是留果过多。因此,如何克服习惯上的留果过多,防止“大小年”结果的恶性循环,逐步做到标准化留果,
Apple tree production depends on the number of flower buds, the rate of fruit set and fruit size of these three factors. However, Guoguang, the main cultivated species in our province, is not a major factor in the fruit setting rate. And about its output is the number of flower buds formed and the size of the fruit of these two factors. Guoguang Province in our province, “the size of the year” results of the phenomenon is very serious, “New Year” when excessive flower buds, trees overloaded, fruit a small quality; “small” when the flower buds rarely, the yield is very low. The “Year of the Year” will inevitably result in unstable output, low quality and weakening of the tree. The main reason for the formation of “size year” results is excessive retention of fruit. Therefore, how to overcome the habit of excessive retention of fruits, to prevent the “big year” result of the vicious circle, and gradually achieve standardized retention fruit,