Objective] The aim was to study effects of different N, P, K ratio fertilization on the growth of Magnolia officinalis plants. [ Method] With high quality Magnolia officinalis plants as test material, through field experiment and indoor analysis, using different ratio of N, P, K fertilizer, the indicators of tree height, DBH, N, P, K content were determined, the relationship between fertilization and yield and quality of Magnolia officinalis plants was analyzed. [Result] Different fertilization amount of N, P and K could increase tree height of 11. 3%-56. 5%, DBH of 10. 2% -48. 4%, improve N content 2. 6% -22. 2%, P content 1. 5% -10. 4%, K content 12. 2% -40. 0%. And there was a significant correlation between indicators and N, P, K. [ Conclusion] The appropriate N, P, K ratio is conductive to the growth of Magnolia officinalis plants, the ratio of N, P, K fertilization amount as 1. 00:0. 44:2. 67 has significant influence to the growth.%[目的]研究不同氮、磷、钾配比施肥对厚朴植物生长的影响。[方法]以优质厚朴植物为试材，通过田间试验和室内分析，采用氮、磷、钾不同配比施肥试验，对厚朴树高、胸径、氮磷钾含量等指标进行测定，分析施肥与厚朴植物的产量和品质的关系。[结果]氮磷钾肥不同施肥水平能增加树高11.3%~56.5%、增大胸径10.2%~48.4%，提高厚朴氮含量2.6%~22.2%、磷含量1.5%~10.4%、钾含量12.2%~40.0%。且各指标与氮磷钾间存在显著相关性。[结论]适宜的氮磷钾配比有利于厚朴植物的生长，对生长影响较大的N∶P∶K的施入量的比例为1.00∶0.44∶2.67。
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