90 Wanxibaie breeder geese(3 years)were randomly assigned to three groups with 6 replicates each,5 birds per replicate,and fed with diets of different metabolizable energy and protein levels(group 1,10.83 MJ/kg、14.00%;group 2,11.33 MJ/kg、14.65% and group 3,11.83 MJ/kg、15.30%).The experiment lasted 30 days.The results showed that the laying performance of group 3 was higher than group 1(P<0.05)and group2(P>0.05),and the ratio of feed to egg of group 3 was lower than group 1(P<0.05)and group2(P>0.05);and the ...