果树生产中常见到大小年结果现象。某一年产量很高,下一年结果很少,甚至完全没有产量。当然大小年结果并不一定都表现那样规律性的隔年交替,可能表现为接连二个大年之后跟着一个低产的小年。大小年结果习性既受气候、土壤和栽培管理等因素的影响,同时也受到果树本身种类品种结果习性、适应性等遗传因素的支配。果树育种和果树生产在品种选择上都非常重视品种的稳产性。在同样的环境和栽培管理条件下,稳产品种较少发生大小年结果现象或者大小年结果程度较轻。 Fruit tree production often see the size of the year results phenomenon. The output of a given year is high, with little or no output in the next year. Of course, the size of the year results do not necessarily show that regularity alternates every other year, which may be followed by two successive years following a low birth year. The results of the annual and annual results are not only affected by climate, soil and cultivation management, but also influenced by the genetic factors such as the habits and adaptability of fruit tree species. Fruit tree breeding and fruit tree production in the selection of varieties are very much attention to the stability of varieties. In the same environment and cultivation and management conditions, the stability of the species less the size of the annual results phenomenon or size of the year results to a lesser extent.