<正>试验研究表明，秃杉叶内氮、钾、镁、钙含量受季节气候影响有显著差异。生长期（７月）叶内氮、磷、钾、镁含量较高，萌动期（３月）含量较低。叶内氮、钾、镁含量与树高季节生长关系密切。土质疏松的林地施氮、钾、磷肥效果明显，使树高和胸径年净生长量增加２０．１％～６３．６％和３３．３％～１０７％。土质粘重的林地施肥效果较差。

Experimental results indicated that the nutrient contents in needles, such as N, P, K, Mg, Ca, were affected by the climate. The contents of N, P, K, Mg were higher in the growing season of June, but lower in the sprouting sarge in March. There was a correlation between the contentS of N, K, Mg and height growing season. The net increment of 21. 1 % ～ 63. 6 % tree height and 33. 3 % ～107 % breast diameter could be achieved by applying N, K, P to the loosened tree site, but the effect to the clay site was not good.