不同施肥配比对罗汉松幼苗生长的影响

Effects of Different Fertilization Proportions on Growth of Podocarpus macrophyllus Seedlings

以2年生罗汉松(Podocarpus macrophyllus)幼苗为试验材料,采用盆栽试验的方法研究不同的施肥处理(氮、磷、钾肥不同配比)对罗汉松幼苗株高、地径、干重的影响,以期为园林引种栽培育苗施肥管理提供理论参考。结果表明:不同的氮、磷、钾肥施肥配比对罗汉松幼苗的株高、地径、根干重、茎干重、叶干重、总干重均产生明显促进作用,其中最佳施肥配比为氮肥2.28 g/株,磷肥9.0 g/株,钾肥0.5 g/株,即表明氮、磷、钾最佳施肥配比为2∶3∶1。

Two-year-old Podocarpus macrophyllus seedlings were used as experimental materials. Pot experi- ment was used to study the effect of different fertilizer treatments （nitrogen, phosphorus, and potassium fer- tilizer with different ratios） on plant height, ground diameter, and dry weight of P. macrophyllus seedlings to provide theoretical reference for introduction, cultivation and fertilization of gardening. Results showed that different N, P and K fertilization ratios had positive effects on plant height, ground diameter, root dry weight, stem dry weight, dry weight of leaves and total dry weight of P. macrophyllus seedlings. The best com- bination ratio of fertilization was that nitrogen fertilizer was 2.28 g per plant, phosphate fertilizer was 9.0 g per plant, potassic fertilizer was 0.5 g per plant. The optimal fertilization ratio of nitrogen, phosphorus and potas- siumwas2： 3： 1.