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在马尾松常规良种繁育过程中,目前主要依靠嫁接来完成无性系分株。过去多采用老枝作接穗(秋接或萌动前嫁接)省内嫁接成活率仅20—30％。有的地方改用嫩枝作穗,嫁接成活率虽有提高,但保存率仍较低,要经补接才能达到建园要求。这不仅延长了繁育过程,而且影响种子园的质量和成效。 嫩枝,具有活跃的,有分裂能力的薄壁组织,愈合力强,嫁接成活率高。但嫩枝的木质化程度低,从采穗到嫁接管理的整个过程中容易失水,这是影响成活的不利因素。为提高嫁
During the normal breeding of Pinus massoniana, clonal strains are mainly relied on for grafting. In the past to use more old branches for scion (autumn or pre-sprouting before grafting) graft survival rate in the province only 20-30%. In some places switched to shoots sprout, although the survival rate of grafting increased, but the preservation rate is still low, to pick up in order to achieve the park requirements. This not only prolongs the breeding process, but also affects the quality and effectiveness of the seed orchard. Twig, with active, capable of dividing the parenchyma, healing power, graft survival rate. However, the low degree of lignification of shoots, easy to lose water from the ear to the grafting management of the entire process, which is unfavorable factors affecting survival. To raise marry