China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (2): 501-508.doi: 10.16431/j.cnki.1671-7236.2021.02.012

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Different Sources of Fiber Diet on Apparent Digestibility,Duodenal Tissue Morphology and Cecal Fiber Digestive Enzyme Activity in Fujian Yellow Rabbits

ZHANG Liping, WANG Jianfeng, LI Zhenzhen, LEI Qiong, DANG Haoqian, LIU Qinghua   

  1. College of Animal Science(College of Bee Science), Fujian Agriculture and Forestry University, Fuzhou 350002, China
  • Received:2020-07-27 Online:2021-02-20 Published:2021-02-23

Abstract: The objective of this study was to investigate the effect of different sources of fiber diets on apparent digestibility,duodenal tissue morphology and cecal fiber digestive enzyme activities of Fujian Yellow rabbits.200 weaning Fujian Yellow rabbits with healthy physique and similar weight were selected and randomly divided into 4 groups,5 replicates per group,10 replicates each.The rabbits in 4 groups were fed with diets composed of 25% alfalfa meal,beet slag,oat hay and barley meal as roughage raw materials,respectively.The feeding experiment lasted for 60 days.On the 54th day,the digestive test was performed using the whole feces collection method.After slaughter,the villous height,crypt dept and their ratio,and cecal cellulase,hemicellulase and pectinase activities were determined.The results showed that:①The digestibility of neutral detergent fiber (NDF),acid detergent fiber(ADF),insoluble fiber(IDF),and soluble fiber(SDF) in alfalfa hay meal and beet slag groups were extremely significantly higher than oat hay and barley meal groups (P<0.01).Among them,the digestibility of IDF and SDF in beet slag group was the highest,which was significantly different from that in alfalfa meal group (P<0.05).②The villus height in alfalfa hay meal and beet slag groups were extremely significantly higher than that in barley meal group (P<0.01),but significantly lower than oat hay group (P<0.05).The crypt depth of alfalfa hay meal and beet slag groups was significantly lower than that of oat hay and barley meal groups (P<0.05),and it was the lowest in beet slag group.The V/C value in beet slag group was highest,which was extremely significantly higher than that of the other groups (P<0.01).③The cecal fiber digestive enzyme activities of alfalfa hay meal and beet slag groups were extremely significantly higher than oat hay and barley meal groups (P<0.01),and the three enzyme activities of beet slag group was extremely significantly higher than that of alfalfa meal group (P<0.01).In conclusion,comparing the four fiber diets,adding 25% beet slag to the diet could improve the apparent digestibility and cecal fiber digestive enzyme activity of meat rabbits,and improve the duodenal tissue morphology of the rabbits.

Key words: fiber source; meat rabbit; digestibility; intestinal morphology; fiber digestive enzyme

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