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本文利用不同浓度的外源激素处理杂种鹅掌楸的扦插繁殖幼苗,并通过烘干法、凯氏法、原子吸收等方法,对扦插繁殖幼苗的根、茎、叶3个器官生物量及其营养元素进行测定。结果表明:不同浓度的外源激素(处理1:IBA50gkg-1+NAA300gkg-1;处理2:IBA50gkg-1+NAA300gkg-1)处理插穗后,根、茎、叶的生物量均有一定程度的提高。在所有的扦插苗中,其根、茎、叶内的含C量差异不大,但茎内的N、P、K、Ca含量较根、叶的少。方差分析结果表明:不同浓度外源激素处理的同一器官后,其C/N及P、K、Ca的含量没有明显的差异;而同一浓度外源激素处理不同器官之间的4种营养元素的含量有显著或极显著的差异。并且扦插生根苗体内营养元素含量较低,在大田栽培时,应及时施肥补充营养,以提高幼苗生长适应能力。图1表4参12。
In this paper, different concentrations of exogenous hormones were used to deal with cutting seedlings of Liriodendron hybrids. The biomass of roots, stems and leaves of three cutting propagation seedlings and their biomass were studied by means of drying method, Kjeldahl method and atomic absorption spectrophotometry Nutritional elements were measured. The results showed that the biomass of roots, stems and leaves were increased to a certain extent after the cuttings were treated with different concentrations of exogenous hormones (treatment 1: IBA 50gkg -1 + NAA 300g kg -1; treatment 2: IBA 50g kg -1 + NAA 300g kg -1) . In all cutting seedlings, the contents of C in roots, stems and leaves were not significantly different, but the content of N, P, K and Ca in stems was less than that of roots and leaves. Analysis of variance showed that there was no significant difference in C / N, P, K and Ca contents in the same organ treated with different concentrations of exogenous hormones; while the same concentration of exogenous hormones treated four kinds of nutrient elements in different organs Significant or significant differences in content. And cutting rooting seedlings lower nutrient content in the field, in the field cultivation, should be timely fertilization and nutritional supplements to improve seedling growth and adaptability. Figure 1 Table 4 Reference 12.