Abstract: A field experiment was conducted to study the efficiencies of the compounded organic fertilizer with monosodium glutamate(COFMSG)and when it was applied in conjunction with inorganic fertilizer(IF)for Tieguanyin tea.The results showed:(a)the application of either COFMSG or COFMSG in conjunction with IF increased the total 3 season(summer,mid-summer,autumn)fresh tea yield by 1.8%-7.0%,as compared with IF alone;(b)the highest yield was obtained when 50% of COFMSG and 50% of IF was used;(c)among the 3 seasons,the best fresh tea yield result was shown in the mid-summer with an increase by 5.7%-17.6% over the IF case;(d)the total amino acid content in tea,especially glutamic acid and phenylalanine,increased appreciably with COFMSG fertilizer.Based on the over-all improvement on total amino acid,yield,quantity and economic evaluation,the best fertilizer combination was determined to be half COFMSG and half IF.