Eucalyptus Trees Sprout Forest In Different Periods According To Stand Growth Variance Analysis

To find the effect of eucalyptus fertilization at different periods and its effect on the growth of eucalyptus plantation, provide a reference for eucalyptus plantation fertilizer production, this article selects biennial fertilizer efficiency at different periods of work on eucalyptus coppice wood, respectively, measure its diameter at breast height, tree height, biomass, leaf nutrient, measure of accumulation in the growth and net income and profit margins, biomass and leaf nutrient, correlation analysis and principal component analysis, the results show that:1, fertilization at different periods have different degrees of influence on eucalyptus tree growth, in addition to no fertilizer and 1, fertilization of tree height growth significant difference at the end of June, the differences were not significant. Growth sorting as follows:1, the end of June, a fertilizer> at the end of may fertilize? fertilization>no fertilizer 1 end of the month.2, eucalyptus forest biomass during different periods after fertilization and change:the branch of biomass is the end of may fertilization> at the end of January fertilization> no fertilizer> 1, the end of June, a fertilizer; Stem biomass is 1, the end of June, a fertilizer> fertilizer> at the end of 5 at the end of January fertilization> no fertilizer; And leaf biomass is 5 fertilization> 1, the end of June at the end of each a fertilizer> no fertilizer> 1 at the end of fertilization.3, different period of fertilizer application on eucalyptus leaf nutrient element content is shown as:the influence of N:at the end of January fertilization> no fertilizer> 1, the end of June at the end of a fertilizer> 5 fertilizer; P:1, the end of June, a fertilizer> the end of may at the end of January fertilization> fertilizer> no fertilizer; K:at the end of June 1, the end of a fertilizer> 1 fertilizer> no fertilizer> fertilizing at the end of may; Ca:1, the end of June, a fertilizer> at the end of January fertilization> no fertilizer> fertilizing at the end of may; Mg:no fertilizer> fertilizer> late January 5 fertilization> 1, the end of June at the end of a fertilizer; Fe:at the end of may> no fertilizer fertilizer> 1 fertilizer> 1, the end of June at the end of a fertilizer; Mn:1, the end of June, a fertilizer> fertilizer> at the end of 5 at the end of January fertilization> no fertilizer; B:no fertilizer> fertilizer> at the end of 5 at the end of January fertilization> 1, the end of June, a fertilizer; Cu:1, the end of June, a fertilizer> the end of may at the end of January fertilization> fertilizer> no fertilizer; Zinc:5 fertilization> 1, the end of June at the end of each a fertilizer>no fertilizer>1 at the end of fertilization.4, different fertilization order of economic benefit:the net income:the end of may fertilization> at the end of January fertilization> no fertilizer> 1, the end of June, a fertilizer; Margin:no fertilizer> fertilizer> at the end of 5 at the end of January fertilization> 1, the end of June, a fertilizer.5, comprehensive score of fertilizer in different periods:1, the end of June, a fertilizer> fertilizer> at the end of 5 at the end of January fertilization>no fertilizer.