Rabbit Complete Formula Feed Trace Element Analysis And Iron Requirement Of New Zealand Rabbits

This study was to evaluate the trace content in rabbit goods perfect compound feed of the market,and the Fe requirements of New Zealand rabbit.We choosed 14 kinds of compound feed rabbit commodities on the market for the content of iron,copper,zinc and manganese,and one hundred and four rabbits were allocated in individual cages for four treatments.In the experiment,1 basal diet and 3 trial diets(the basal diet with the supplemental of 50,100 and 200 mg/kg(the form was FeSO4)were prepared for the control and trial groups.The trial lasted for 7 days for adaption,and 60 days for experiment.The results showed that:(1)The content trace elements of iron,copper,zinc and manganese in rabbit goods perfect compound feed is 655,38,91 and 107 mg/kg,respectively.It significantly higher than NRC(1977),French AEC(1993),and the domestic rabbit breeding standards;Different usages and different physiological stages of rabbit trace elements iron,copper,zinc and manganese there exist certain differences.(2)Dietary Fe supplemental levels had no significant effect on the average daily gain(ADG),the average daily intake(ADFI)and the feed/gain ratio(F/G)(P>0.05)of weaned-2 month old growing New Zealand rabbit.However,it had significant effect on ADG and F/G 2-3 month old growing New Zealand rabbit(P>0.05),with the Fe supplemental level increasing,the ADG was firstly increased and then decreased,the ADG was firstly decreased and then increased,the highest ADG and lowest F/G is 100 mg/kg.The survival rate is the highest when the diet Fe supplemental level was 100 mg/kg of weaned?2 month,2?3 month old growing New Zealand rabbit.(3)Different Fe supplemental level had significant effects on half eviscerated ratio and all eviscerated ratio of weaned?2 month,2?3 month old growing New Zealand rabbit(P<0.05),with the Fe supplemental level increasing,the half eviscerated ratio and all eviscerated ratio was firstly increased and then decreased,and the highest was 50 mg/kg.Dietary Fe supplemental level had no significant effect on liver ratio and kidney ratio(P>0.05),but had significant effect on spleen ratio of weaned?2 month old growing New Zealand rabbit(P<0.05).However,dietary Fe supplemental level had no significant effect on liver ratio(P>0.05),but had significant effect on spleen ratio and kidney ratio of 2?3 month old growing New Zealand rabbit(P<0.05).50,100,200 mg/kg iron groups,viscera index is significantly higher than the control group without adding iron.(4)The dietary Fe supplemental level had no significant effect on the content of Fe,Cu,Zn,Ca and Mg of weaned?2 month,2?3 month old growing New Zealand rabbit blood.Different Fe level had significant effects on platelet distribution width(PDW),mean platelet volume(MPV)and platelet-large cell rate(P-LCR)(P<0.05),and the value was the highest when the Fe supplemental level was 50 mg/kg.