蓝云杉插穗生根过程中营养物质含量的变化

Changes of Nutrient Contents during Rooting of Picea pungens Cuttings

摘要: 以5年生蓝云杉采穗母株上的一级侧枝为材料，采用悬臂转动式全光自动喷雾装置扦插试验，研究了IBA与蒸馏水处理下扦插生根过程中可溶性糖、可溶性蛋白质、全氮和全碳4种营养物质的动态变化，分析了其变化规律与生根的关系。结果表明，蓝云杉开始生根期为扦插后30 d，到扦插后80 d时，生根率达到97%；蛋白质含量先降低然后升高，最后又降低；可溶性总糖含量都呈现先升后降，然后又升的变化趋势；氮和碳含量呈现出先升高后降低再升高最后略有下降的规律；营养物质动态变化与蓝云杉生根进程密切相关。插穗经外源激素处理促进了其营养物质动态转换，有助于蓝云杉不定根的形成。

Abstract: With 5-year-old Picea pungens’ primary lateral branch materials, using the cutting experiment, IBA was studied with the treatment of distilled water under the rooting process of dynamic change of soluble sugar, soluble protein, total nitrogen and carbon 4 nutrients, and the relation between their variation and rooting was analyzed. The results showed that P. pungens began to root after cutting 30 days; the rooting rate reached 97% after cutting 80 days; the protein contents first decreased and then increased, and finally decreased; the total soluble sugar contents showed first increased and then decreased, and then kept rising trend; nitrogen and carbon contents increased first and then reduced and then slightly increased by last rule; nutrient dynamic change and rooting process were closely related to P. pungens. Cuttings by exogenous hormone treatment promoted the nutrient dynamic change and helped the formation of adventitious roots in P. pungens.