试图诱导幼年期苗木开花的基本原理(苗木个体发育阶段用各种方法不能诱导形成花(Doorenbos 1965)]对于那些从事林木育种的工作者来说,不须作任何解释。但是除了“任意地”终止幼年状态是一个重要目的外,在采用良种苗木的人工造林计划中,用遗传优良的砧木来调整性成熟种子园树木的球果产量也是必要的。这两个目的过去曾作为不同的问题被 Attempts to Initiate the Fundamental Principles of Flowering in Juvenile Seedlings (Doorenbos 1965 by Various Approaches in Developmental Stages of Seedlings) There is no need for any explanation for those undertaking tree breeding, except that “any” Termination of juvenile status is an important objective, and it is also necessary to adjust the coniferous fruit production of mature seed orchard trees with well-grounded rootstocks in well-planted plantations, both of which have been used as different problems in the past