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黑赤松(Pinus thunbergii×P.densiflora)是从黑松人工林中选出的天然杂种,具有生长快,对松干蚧、松毛虫有较强抗性等特点。但是,由于采用种子繁殖变异性大,很难保持母树优良遗传品质,而且结实少,种子空粒较多。为加速苗木生产的发展,我们于1983年开始研究无性繁殖途径,现已取得初步结果。一、试验材料黑赤松的针叶束和插穗采自本省文登县的北海、乳山县的垛山、招远县的罗山、莱西县的大沽河和芝罘区幸福等林场的2—20年生天然杂交林母树上。选取颜色浓绿、生长健壮的
Pinus thunbergii × P.densiflora is a natural hybrid selected from the Pinus thunbergii plantation, which has the characteristics of fast growth, strong resistance to the pine ciliate and dendrolimus. However, due to the large variability of seed breeding, it is difficult to maintain the excellent genetic quality of the mother tree, and less robust, seed more empty seeds. To speed up the development of nursery stock production, we started to study the cloning route in 1983 and preliminary results have been obtained. First, the test material Pinus densiflora spatula and cuttings taken from the province of Wendeng County in the North Sea, Dunshan Rushan County, Luoshan County in Zhaoyuan County, Daxi River in Lacey County and Zhifu District blessed forest and other 2 to 20 years Natural hybrid forest trees. Select the color dark green, robust growth