爪哇木棉苗木对不同配比肥料的生长响应

摘要

以1a生爪哇木棉营养袋播种苗为研究对象,采用L25(53)正交试验设计,研究不同施肥配比对爪哇木棉苗期生长的影响.结果表明:爪哇木棉苗木高生长最优肥料配比组合为N3P5K2,地径生长最优组合为N2P4K5,主根长最高为N2P4K5,而Ⅰ级侧根数最高为N3P5K2；通过4个生长指标主成分分析及标准化计算,确定最优施肥组合为N2P5K1,即尿素肥10.87 g/m2+过磷酸钙肥388.89g/m2+硫酸钾肥0 g/m2.苗期施肥有利于幼苗的生长,能够有效促进侧根伸长和数量的增加,从促进苗木质量及经济价值考虑,爪哇木棉苗期施肥效益显著.%One year old nutrition bag seedlings of Ceiba pentandra were used to study the effect on seedling growth of different fertilizer ratios with L25 (53 ) orthogonal experimental design. The best high-growth portfolio of Ceiba pentandra seedlings is N3P5K2, the highest main root length is N2P4K5, and the highest number of I-level lateral roots is N3P5K2. By the principal component analysis and standardized computing of four growth index, to determine the optimum fertilizer combination is N2PSK1 , namely, Urea 10. 87g/m2, SSP 388. 89g/m2, Potassium 0g/m2. Seedling fertilization is good for the growth, and can effectively promote elongation and number of lateral roots, considered seedling quality and economic value; the efficiency of Ceiba pentandra seedling fertilizer is significant.