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通过对光皮桦无性系造林试验的初步结果分析可知,其优良无性系与实生苗的生长差异显著,其中1、2号无性系3年生单株材积对比实生苗增益分别达31.7%、36.7%。立地条件对光皮桦生长影响较大,在适地适树的基础上要充分发挥无性系与林地的互作效应,达到最佳的增产效果。林木育种工作应遵循“有性起源,无性利用”的改良途径,充分发挥无性系育林的增产潜力。
According to the preliminary analysis of the afforestation experiment of Betula luminifera, the difference of growth of excellent clones and seedlings was significant, among which, the gain of 3-year-old single-plant plot of No.1 and 2 clones reached 31.7% and 36.7% . Site conditions have a greater impact on the growth of Betula luminifera, and on the basis of suitable tree planting, we should give full play to the interaction effect between clones and woodlands to achieve the best stimulation effect. Forest breeding should follow the “sexual origins, asexual use,” an improved approach to give full play to clonality of plantation yield potential.