叶果比法:花和果实主要依靠根的吸收和叶片合成的营养物质进行生长,其闯有一个相互依存的供求关系。据调查,中型果品种叶果比应为30～40:1,大型果品种为40～50:1。枝果比法:即上半年剪留的枝梢数与果实之比。一般大型果品种可掌握3:1,弱树4～5:1,小型果品种2～3:1。树干截面积法:树干粗细是果树枝叶与根系物质流量多少的标志,决定着合理负载的大小。研究 The ratio of leaf to fruit: flowers and fruits mainly rely on root absorption and leaf nutrients synthesized growth, its break with an interdependent supply and demand. According to the survey, medium-sized fruit varieties should be 30 ~ 40: 1 leaf ratio, large fruit varieties 40 ~ 50: 1. Branches than the law: that is, the first half of the branches and cut the number of branches and fruit ratio. General large fruit varieties can grasp 3: 1, 4 to 5: 1 weak tree, small fruit varieties 2 to 3: 1. Trunk cross-sectional area method: the thickness of the trunk is the fruit tree branches and roots material flow rate of how much the sign, determines the size of a reasonable load. the study