Effects of different nitrogen, phosphorus and potassium fertilizer combination on growth of avocado seedling were conducted to providing theoretical basis for avocado quality seedling production. Through the analysis results of seedling height, stem diameter, vitality of root and dry matter to ensure the best combination of applying fertilizer with 3 factors 3 levels orthogonal test design. The results showed that each combination formula has certain promoting effect on gowth of avocados seedlings, the best combination is N2P3K2, namely urea 1.0 g/kg, superphosphate 1.0 g/kg, potassium sulfate 0.25 g/kg, it can promote avocado seedlingˊs dry matter accumulation, vitality of root and diameter. Taking into account of each index in this experiment, the best combination is N2P1K1, namely urea 1.0 g/kg, superphosphate 0.25 g/kg, potassium sulfate 0.125 g/kg, ratio of N∶P2O5∶K2O of about 12∶1∶2.%研究氮、磷、钾不同配方施肥组合对油梨幼苗生长的影响,为油梨优质苗木的生产提供理论基础。采用3因素3水平正交试验设计,通过综合苗高、地径、根系活力以及干物质质量等测定结果来确定最佳的配方施肥组合。结果表明,各个配方组合对油梨幼苗生长均有一定的促进作用,对油梨幼苗干物质积累、地径和根系活力等促进效果最好的组合为N2P3K2,即尿素1.0 g/kg,过磷酸钙1.0 g/kg,硫酸钾0.25 g/kg；对油梨幼苗苗高促进作用最好的组合为N2P3K1,即尿素1.0 g/kg,过磷酸钙1.0 g/kg,硫酸钾0.125 g/kg。综合考虑各项指标,试验得到的最优配方施肥组合为N2P1K1,即尿素为1.0 g/kg,过磷酸钙0.25 g/kg,硫酸钾0.125 g/kg, N∶P2O5∶K2O约12∶1∶2。
展开▼
