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

作　　者：高承芳[1] 桑雷[1] 孙世坤[1] 陈冬金[1] 王锦祥[1] 谢喜平[1] GAO Cheng-fang;SANG Lei;SUN Shi-kun;CHEN Dong-jin;WANG Jin-xiang;XIE Xi-ping(Institute of Animal Husbandry and Veterinary Medicine,Fujian Academy of Agricultural Sciences,Fujian Key Laboratory of Animal Genetics and Breeding,Fuzhou 350013,China)

机构地区：[1]福建省农业科学院畜牧兽医研究所,福建省畜禽遗传育种重点实验室,福建福州350013

出　　处：《草业学报》2024年第4期199-209,共11页Acta Prataculturae Sinica

基　　金：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(2022R1026003,2021R10260014);福建省自然基金(2021J01486);福建省农业科学院科技创新团队建设项目(CXTD2021006-2-2)资助。

摘　　要：为探讨葛藤在肉兔饲粮中的应用效果,开展葛藤的常规营养成分分析,选取35±2日龄体重(0.88±0.13 kg)相近的断奶伊拉兔肉兔200只,随机分成4组,每组5个重复,每个重复10只,分别饲喂添加0(对照组)、15%、25%、35%葛藤的试验饲粮。预试期7 d,正试期42 d。于正试期第36天开始进行为期7 d的消化代谢试验,分析肉兔养分表观消化率,试验结束后测定分析肉兔盲肠消化酶活性及胃肠道的变化。结果显示,饲粮中添加不同量的葛藤:1)提高了各处理组肉兔对饲粮中干物质、粗蛋白、粗纤维、中性洗涤纤维、酸性洗涤纤维、酸性木质素、粗脂肪和半乳糖醛酸的表观消化率,35%葛藤组表观消化率最高,显著高于15%葛藤组与对照组(P<0.05)。2)提高了肉兔盲肠中纤维素酶、半纤维素酶与果胶酶活性,15%葛藤组酶活性最高,显著高于对照组(P<0.05)。3)对肉兔胃及小肠的相对长度无显著影响(P>0.05),但显著提高了盲肠相对长度和重量、胃相对重量与小肠相对重量,25%与35%葛藤组显著高于对照组(P<0.05)。4)提高了肉兔空肠、回肠与十二指肠的绒毛长度、绒毛长度/隐窝深度比值(V/C)和黏膜层厚度,降低了隐窝深度值,35%葛藤组肉兔回肠、十二指肠的绒毛长度显著高于对照组(P<0.05),空肠、回肠的隐窝深度低于对照组,空肠、回肠的V/C显著高于对照组(P<0.05)。因此,生长肉兔饲粮中最适宜的葛藤添加量为35%。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 c

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 

分 类 号：S829.1[农业科学—畜牧学]