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在香椿苗木的培育过程中，为了适应保护地栽培的需要，必须对苗木进行矮化处理，使其高度控制在1－1．5m范围内。矮化措施是：1．苗期切断主根，促使分生侧根，抑制地上部分生长，从而达到茎干矮而粗的目的。2进行植株摘心，有利于苗木增粗、变矮，提早形成饱满芽。摘心应根据
In the cultivation process of Toona sinensis seedlings, in order to adapt to the needs of the protective cultivation, seedlings must be dwarfed to a high degree of control in the 1-1.5m range. Dwarfing measures are: 1. Seedling cut off the main root, prompting meristematic root, inhibit the growth of the ground above, so as to achieve the stem short and thick purpose. 2 for plant topping, is conducive to seedling thickening, shortening, early formation of full bud. Topping should be based on