湿地松幼苗盆栽土混入松林土感染天然外生菌根，设Ｎ、Ｐ、ｋ、ＮＰ、ＮＫ、ＰＬ、ＮＰＫ、全肥处理及对照，观测幼苗生长和外生菌根感染率。结果显示，全肥、ＮＰＫ、ＮＰ、Ｐ处理效果较好。全肥和ＮＰＫ处理地径比ＣＫ均提高４６．２％，ＮＰ株高比ＣＫ提高２４．４％，Ｐ、ＮＰ、全肥生物量分别比ＣＫ提高１２．７％、１０．６％、６．０％；天然菌根感染率与施Ｎ呈负相关，与幼苗生长关系不密切。指出了根据营养需要进行配方施肥及筛选优良菌种、进行人工接种对培育壮苗的重要性 The natural ectomycorrhizal fungi were infected with potting soil of Pinus elliottii and mixed with pine forest soils. N, P, K, NP, NK, PL and NPK were applied to the soil. The results showed that the whole fertilizer, NPK, NP, P treatment effect is better. The average diameter of NP and NPK increased by 46.2% and 24.4%, respectively, and the biomass of P and NP increased by 12.7% and 10.6%, respectively, compared with CK .0%. Natural mycorrhizal infection rate was negatively correlated with N application, but not with seedling growth. Pointed out the importance of formulating fertilizers and screening fine strains according to nutritional needs, artificial inoculation on the cultivation of strong seedlings