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连续４年杉木幼林的施肥试验表明，花岗岩发育的黄红壤上杉木幼林对磷肥的生长效应最大，单施钾肥有促进生长的作用，但单施氮肥对幼林生长无效，而磷钾、磷氮混施能明显促进林木生长。氮、磷、钾这三种肥料的效应与施肥时间有关，磷肥作基肥一次性施入优于分年施入的效果，而氮肥、钾肥则分别于造林后第二年和第三年施入为好。所有处理中，以（１００ｋｇＰ２Ｏ５＋１００ｋｇＫ２Ｏ）／ｈｍ２的处理肥效最好，（１００ｋｇＮ＋５０ｋｇＰ２Ｏ５）／ｈｍ２的处理次之，其４年生树高比对照分别大１０．２％和８．４％，胸径分别大２７．７％和９．１０％，蓄积分别大于７２．５％、７０．７％。
Fertilization experiments on young Chinese fir plantations for 4 consecutive years showed that the growth of young Chinese fir plantations on granite was the greatest on the growth of phosphate fertilizer, and the single application of potassium fertilizer had the effect of promoting growth. However, the single application of nitrogen fertilizer had no effect on the growth of young plantations, while the phosphorus, Shi can significantly promote the growth of trees. The effect of three kinds of nitrogen, phosphorus and potassium fertilizers was related to fertilization time. The one-time application of phosphate fertilizer as basal fertilizer was better than the one applied in different years, while the nitrogen and potassium fertilizers were applied in the second and third year respectively As well In all the treatments, the treatment with (100kgP2O5 + 100kgK2O) / hm2 had the best fertilizer efficiency (100kgN + 50kgP2O5) / hm2, and the 4-year tree height was 10.2% and 8.4% larger than that of the control respectively. 7% and 9.10%, respectively, the accumulation of more than 72.5%, 70.7%.