【摘要】 运用正交试验设计探讨了N(尿素 )、P(过磷酸钙 )、K(氯化钾 )和有机肥 (鸡粪 )对厚荚相思生长及干形的影响。试验结果表明 ,不同施肥处理对树高、胸径、单株材积生长有极显著影响 ,其中以 4号处理的单株材积生长量最大 ,达 0 .0 391m3,比 1 0号处理 (对照 ,不施肥 )增加了 99.5 %。从生长量及经济效益 (产出投入比 )分析 ,最佳施肥处理为 9号 ,其次为 7号。经方差分析的综合比较 ,选择N 3水平 ,P1水平 ,K1水平 ,有机肥 2水平 ,即每株分别施入 2 0 0g尿素 ,30 0 g过磷酸钙 ,5 0 g氯化钾 ,2 5 0 0 g鸡粪效果最好 ,经济效益高。更多还原

【Abstract】 The fertilization effect on young plantation of Acacia crassicarpa at 3 years old was studied. The results showed that there is significant difference in growth among 9 fertilizer treatments. Treatment 4 has the best volume of 0.0391 m 3, which increase 99.5% than that of control. The analysis of the ratio for input and output indicated that the best fertilizer treatment is treatment 9, and the next is treatment 7. For variance analysis and synthetic selection, fertilize 200 g carbamide, 300 g calcium superphosphate, 50 potassium chloride and 2 500 g poultry dung per tree have the best growth effect, and also have good economic effect.更多还原