近几年来，成年李园产量上的“大小年”现象非常突出，往往“大年”果多价廉，而“小年”价好果少，严重影响了果农的经济收入和种果积极性。因此李树“大小年”的控制成了广大果农急需解决的问题。１　笔者认为形成李树“大小年”的根本原因是营养生长和生殖生长的不平衡。直 In recent years, the “size year” phenomenon in the production of adult plum trees is very prominent. The fruits of “Year of the New Year” are mostly cheaper and cheaper, while the prices of “Year of the Ox” are less, which seriously affect the economic income and the enthusiasm of the fruit growers. Therefore, Li tree “size year” control has become the majority of farmers in urgent need of solution. 1 The author believes that the fundamental reason for the formation of plum tree “size year” is the imbalance between vegetative and reproductive growth. straight