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联邦德国林业——木材研究院的林木遗传育种研究所,为研究生根能力强和无方向习性的云杉无性系,选择了5个种源的25个无性系云杉做扦插试验,从12厘米高的云杉实生苗剪取4厘米长的插穗,扦插到经杀菌剂消毒的碳——珠光岩——砂土基质中,在20℃气温条件下的温室内,连续光照20小时,刺激上胚轴不断生长,最早在3周后即完全生根,最晚者在8周后生根。5个月后的扦插苗则又可截取插穗了,这样在1年内每个无性系则可取36—65个插穗,若能采取
The Institute of Forest Genetics and Breeding at the Federal Institute of Forestry and Timber Research, a spruce clonal experiment of 25 sprouting spruce families of 5 provenances, was selected from 12 cm High spruce seedlings cut 4 cm long cuttings, cuttings sterilized disinfection of carbon - pearlite - sand matrix, at 20 ℃ temperature conditions in the greenhouse, continuous light 20 hours to stimulate The hypocotyl continuously grows, rooting completely after 3 weeks at the earliest, and the latest one takes root after 8 weeks. 5 months after the cutting seedlings can cut interception cuttings, so that each clones within 1 year is desirable 36-65 cuttings, if we can take