【摘要】 通过三因素、三水平正交设计9种不同施肥处理,对4年生中林46杨进行施肥试验研究,结果表明不同配方施肥对中林46杨的生长有明显的促进作用,其中对树高和胸径的影响分别达到了极显著、显著差异;且N肥对其生长的影响最明显,其次为P、K肥;通过逐步回归分析,得出尿素、过磷酸钙、硫酸钾最佳施肥量分别为0.3、0.6、0.05 kg/株(即N:P2O5:K2O比例约为1∶0.63∶0.16);在所设施肥处理中经济效益最好的是处理5,即尿素0.2 kg/株、过磷酸钙0.3 kg/株、硫酸钾0.2 kg/株。更多还原

【Abstract】 The experiment was designed with 9 different fertilization treatments（including the comparison） with three factors and three level orthogonnal design for Poplar Zhonglin-46 of 4 years old.The results showed that different formulated fertilizers had an obvious effect on the growth of Poplar Zhonglin-46,whereas existing a significant difference on tree height and an obvious difference on diameter.The order of N,P,K fertilizers which are needed by Poplar zhonglin-46 is N>P>K.By regression analysis,the optimum amount of fertilization is: urea: 0.3 kg/tree;superphosphate: 0.6 kg/tree; potassium sulphide: 0.05 kg/tree（N∶P₂O₅∶K₂O=1∶0.63∶0.16）.The best economic benefit treatment of all is: urea:0.2 kg/tree;superphosphate: 0.3 kg/tree;potassium sulphide: 0.2 kg/tree.更多还原