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选用增产水平较高的繁殖材料是提高杉木无性系增产效益的关键。用一系列实例说明推广优良家系的无性系苗和引进优良种源区的优良无性系是当前达到这一目的的较好方法。
The selection of propagation materials with higher yield is the key to improve yield of Chinese fir clones. A series of examples illustrate that promoting clones of elite pedigree families and introducing elite clones in good provenance regions are the best ways to achieve this goal.