Effects of Different Proportions of Aged Rice Replacing Corn on Growth Performance,Intestinal Morphology and Nutrient Apparent Digestibility of Meat Rabbits
This experiment was conducted to investigate the effects of different proportions of aged rice repla-cing corn on growth performance,intestinal morphology and nutrient apparent digestibility of meat rabbits.A total of 240 healthy New Zealand white rabbits of 35-day-old with similar body weight were randomly divided into 4 groups with 6 replicates per group and 10 rabbits per replicate.The rabbits in the control group were fed a basal diet,while those in the experimental groups were fed diets in which aged rice replaced 25％,50％and 100％of the corn in the basal diet,respectively.The experiment lasted for 42 days.The results showed as fol-lows:1)there were no significant differences in the final body weight,average daily feed intake,average dai-ly gain and feed to gain ratio of meat rabbits among all groups(P＞0.05).Compared with the control group,the mortality rate in 25％aged rice replacing group was decreased by 16.70％(P＞0.05),and the diarrhea rates in 25％and 50％aged rice replacing groups were decreased by 37.51％(P＞0.05).2)There were no significant differences in the villus height,crypt depth and villus height to crypt depth ratio in duodenum,jeju-num and ileum of meat rabbits among all groups(P＞0.05).3)Compared with the control group,the apparent digestibilities of dry matter,gross energy,crude protein,neutral detergent fiber,acid detergent fiber and acid detergent lignin in 25％and 50％aged rice replacing groups were not significantly different(P＞0.05),while the above indices and ether extract apparent digestibility in 100％aged rice replacing group were significantly increased(P＜0.05).In conclusion,the proportion of aged rice replacing corn less than 50％in the diet for meat rabbits has no adverse effects on the growth performance and digestion of dietary nutrients of meat rabbits.[Chinese Journal of Animal Nutrition,2024,36(7):4630-4637]
万方数据
维普
