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在立地指数为１４的硅铝质黄壤上进行马尾松施肥量及配比试验研究，造林三年试验结果表明：马尾松造林第一、二年施肥效应不显著，到第三年才有明显效果；除Ｎ肥单施外（４处理）其余处理的树高生长均超过对照；不同剂量的Ｐ、Ｋ肥单施，差异不显著，Ｎ肥单施甚至有一定程度的负作用；Ｎ、Ｐ、Ｋ配合施肥效果显著。其中以每株施１００ｇＰ肥配合２５ｇＫ肥表现最好，其树高为对照的１１６％，差异极显著，地径为对照的１１２％．
Mass-ratio of Pinus massoniana on the siliceous yellow soil with the site index of 14 was studied. The results of three-year afforestation experiment showed that the first and second years of Pinus massoniana afforestation did not have significant effect of fertilization, and there was obvious effect in the third year ; Except for N fertilizer alone (4 treatment), the tree height growth of the other treatments were more than the control; different doses of P, K fertilizer single application, the difference was not significant, N fertilizer single application even have a certain degree of negative effects; N, P K with fertilizing effect is remarkable. Among them, 100gP fertilizer per plant with 25gK fertilizers performed best, and its tree height was 116% of the control, the difference was very significant, with a diameter of 112% of the control.