Abstract: Present paper dealt with the fertilizing quantities by artificial control on eucalyptus at different forest age in stationary experiment. The result show that(1) The effect were striking in basal manure on eucalyptus,its effect could continued for 5 years and more,but its effect come down along with the increase of forest age. The suitable playing quantities of basal manure were organic manure 2.5 kg,in harmony with N15P30K15～30 and fit B,Zn,Cu per tree.(2)The effect of top dressing varied from forest age to forest age,that were 2 years old 3 years old1 years old.The suitable playing quantities of top dressing were N30～60,P15～30,K15～30.(3) After eucalyptus plantation the vast majority of soil organic were come down differently, total N, total P and available N were not striking,but soil total K,available P, K,B,Zn,and Cu were significantly come down. In addition,the paper comprehended those results for scientific fertilization of short rotation eucalyptus plantation.