草业学报2024，Vol.33Issue(4)：199-209,11.DOI:10.11686/cyxb2023180
饲粮中葛藤不同添加量对肉兔养分表观消化率、胃肠道发育及消化酶活性的影响
Effects of dietary supplementation with kudzu vine on apparent nutrient digestibility,intestinal development,and intestinal digestive enzyme activities in growing meat rabbits
摘要
Abstract
We investigated the effect of dietary supplementation with kudzu vine(Pueraria lobata)on the growth and quality of meat rabbits.A total of 200 weaned Ira rabbits with similar body weight(0.88±0.13 kg)at 35±2 days of age were randomly divided into four groups with five replicates in each group and 10 rabbits in each replicate.The rabbits were fed with diets containing 0(Group A),15%(Group B),25%(Group C),and 35%(Group D)kudzu vine,where Group A was the control group.The experiment consisted of a 7-day pretest period,followed by a 42-day trial period.Starting from day 36 of the trial period,a 7-day digestion and metabolism test was conducted to analyze the apparent digestibility of nutrients in the diets of meat rabbits.Intestinal development and the activities of intestinal digestive enzymes were determined and analyzed at the end of the test.A conventional nutrient analysis was conducted for kudzu vine.It was found that:1)The apparent digestibility of nutrients(dry matter,crude protein,crude fiber,neutral detergent fiber,acid detergent fiber,acidic lignin,ether extract,and galacturonic acid)by meat rabbits was higher in the treatment groups than in the control group.The apparent nutrient digestibility was highest in Group D(35%kudzu vine),and it was significantly higher than that in Group B(15%kudzu vine)and the control group(P<0.05).2)The activities of cellulase,hemicellulose,and pectinase in the cecum of meat rabbits were higher in the treatment groups than in the control group.The activities of these enzymes were highest in group B(15%kudzu vine),and were significantly higher than those of their counterparts in the control group(P<0.05).3)Dietary supplementation with kudzu vine had no effect on the relative length of the stomach and small intestine of meat rabbits(P>0.05).However,the relative length of the cecum,relative weight of the cecum,relative weight of the stomach,and relative weight of the small intestine were significantly higher in Groups C and D(25%and 35%kudzu vine,respectively)than in the control group(P<0.05).4)Dietary supplementation with kudzu vine increased the villus length of the jejunum,ileum,and duodenum,villus length/crypt depth(V/C)ratio,and the mucosal thickness of meat rabbits,and decreased the crypt depth.Compared with the control group,Group D(35%kudzu vine)showed significantly higher values(P<0.05)for villus length of the ileum and duodenum,lower values for the crypt depth of the jejunum and ileum,and significantly higher values(P<0.05)for the V/C ratio of the jejunum and ileum.Therefore,dietary supplementation with 35%kudzu vine is optimal for Ira meat rabbits.关键词
伊拉兔/葛藤/养分表观消化率/胃肠道发育/消化酶活性Key words
Ira rabbits/kudzu vine/nutrient apparent digestibility/intestinal development/digestive enzyme activities引用本文复制引用
高承芳,桑雷,孙世坤,陈冬金,王锦祥,谢喜平..饲粮中葛藤不同添加量对肉兔养分表观消化率、胃肠道发育及消化酶活性的影响[J].草业学报,2024,33(4):199-209,11.基金项目
国家现代农业产业技术体系建设专项(CARS-43-G-5),福建省科技计划公益类专项(2022R1026003 （CARS-43-G-5）
2021R10260014),福建省自然基金(2021J01486)和福建省农业科学院科技创新团队建设项目(CXTD2021006-2-2)资助. （2021J01486）
