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无性系林为从70年代被提出来以后,发展非常迅速。它以周期短、速度快和增益大的特点,显示出了强大的生命力。能够无性繁殖的树种走无性系林业的道路,已成为当前林业的发展趋势。然而在实际应用中,树木能够被证明具有优良基因型时一般已成为大树,具有成熟的特征,生根困难,生长衰弱。这给优树的无性繁殖和实际利用带来了极大的困难,使无性系林业的价值难以体现出来。因此,克服成熟性,保持幼年性,已成为当务之急。本文就树木成熟的机理、幼态保持和复壮的机制作了系统的综述,并对各种复壮措施进行了评述。
After being proposed for cloning since the 1970s, clones have developed very rapidly. It is a short cycle, high speed and gain characteristics, showing a strong vitality. Able to reproduce the tree species to take the road to climatic forestry has become the current development trend of forestry. However, in practical applications, trees can generally become large trees when proven to have excellent genotypes, with mature characteristics, difficult rooting and poor growth. This brought immense difficulties to the asexual reproduction and actual utilization of clones, making the value of clonal forestry difficult to reflect. Therefore, overcoming maturity and keeping juvenility has become a top priority. In this paper, the mechanism of tree maturity, the mechanism of juvenile maintenance and rejuvenation were systematically reviewed, and various rejuvenation measures were reviewed.