Effect Of Protein Level On Production Capability And Utilization Rate Of Nutriment Of Japanese Big Ear Rabbit

The experimentation investigate that effect of different protein level on production capability,digestibility of nutriment,survive rate on 1～2 month-old and 2～3 month-old Japan big ear rabbit,and compared the different of these results between two kinds of age. Nutrient content of six kinds of experimental diets is resemble except protein level (12.17%,14.19%,15.86%,17.90%,19.57%,21.60%).The results as follows:From 1 to 2 month-old,production capability,digestibility of nutriment of Japanese big ear rabbit ascended first with the improvement of protein levels,then descend.Daily gain in 19.57%CP treatment is highest(30.04g/d),and 15.86%,17.90%,19.57%,21.60% CP treatment had significant difference than 12.17%,14.19%CP treatment(P＜0.01),the 15.86%,17.90%,19.57%,21.60%CP treatment among had no significant difference (P＞0.05);15.86%,17.90%CP treatment feed conversion rate is 3.07:1,is lowest,it had significant difference than 12.17%CP treatment(P＜0.05),and had no significant difference than other treatment(P＞0.05);the survive rate of infancy rabbit in 15.86%, 17.90%CP treatment is highest(85%),and had significant difference than 12.17%CP treatment(P＜0.05),and had no significant difference than other treatment(P＞0.05).From 2 to 3 month-old,production capability,digestibility of nutriment of Japanese big ear rabbit ascended first with the improvement of protein levels,then descend.Daily gain in 17.90%CP treatment is highest,it is 23.80g/d.15.86%,17.90%,19.57%,21.60% CP treatment had significant difference than 12.17%CP treatment(P＜0.01),17.90%CP treatment had significant difference than 14.19%CP treatment(P＜0.05),the 15.86%, 17.90%,19.57%,21.60%CP treatment among had no significant difference(P＞0.05);the 17.90%CP treatment feed conversion rate is 4.60:1,it is lowest.CP digestibility of 17.90%CP treatment is highest,it is 72.30%,but had no significant difference than 15.55%,17.56%CP treatment(P＞0.05).CF digestibility of 17.90%CP treatment is highest, is 22.63%;the survive rate of infancy rabbit in each treatment had difference,the 12.17% CP treatment is lowest,is 80.0%.compare various index,daily gain of weaning～2month-old rabbit is higher than of 2～3 month-old rabbit;feed conversion rate of weaning～2month-old rabbit is lower than of 2～3 month-old rabbit;nutrient digestibility of 2～3 month-old rabbit is higher than of weaning～2month-old rabbit;survive rate of 2～3 month-old rabbit is higher than of weaning～2month-old rabbit.