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国家发布的苗木标准规定红松苗在苗圃培育4年,生产苗龄型2—2年生苗造林。红松苗正常的年高生长后期,在形成新顶芽的过程中,顶芽又伸长,长出新梢的现象我们称之为苗木年高再生长。在全光育苗中常出现这种现象而使苗木遭受损害。为了探索导致红松苗年高再生长的生态因子和抑制红松苗年高再生长的方法,笔者于1985—1986年在铁力林业局建设、二股两苗圃进行了试验。现将结果整理如下:
Seedlings issued by the state standards pine seedlings nursery nurturing four years to produce seedling type 2 - 2-year-old afforestation. Korean pine seedlings normal high growth late, in the process of forming a new bud, the top bud and elongation, the growth of new shoots phenomenon we call the seedlings of high and then grow. Seedlings often suffer from this phenomenon in seedlings. In order to explore the ecological factors that led to the high regrowth of Korean pine seedlings and the method of inhibiting the high regrowth of Korean pine seedlings in the year, the author experimented with construction of Tieli Forestry Bureau and two stocks of two nurseries in 1985-1986. The results are now organized as follows: