The nine microminerals,Cu, Mn,Zn,K,Na,Ca,Mg,Mo and Fe,in feather,down, heart, liver, stomach and muscle have been detected and measured for the geese ofthe treatment and control groups, respectively. The results show that difference of contentof the microminerals for the two groups is not significant for heart, liver, stomach anddown , but for feather and down,and that the content of Cu,Mn,Zn and Fe for the treat-ment group are respectively l3.8%, 12.9%, 18.5%and l5.O% in feather,13.6%, 16.4%, 15.2%and l4.4% in down more than that for the cortr...