摘要
本试验旨在研究维生素C对育成期水貂生长性能、养分消化率及氮代谢的影响。试验选用60日龄育成期水貂120只,随机分为6组,每组20只(10只公貂、10只母貂)。Ⅰ组(对照组)饲喂基础饲粮,Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ组分别在基础饲粮中添加25、50、100、200和400 mg/kg维生素C。预试期7 d,正试期58 d。结果表明:1)Ⅳ组公貂的平均日采食量极显著高于Ⅰ和Ⅲ组(P<0.01),显著高于Ⅱ、Ⅴ和Ⅵ组(P<0.05);Ⅲ组公貂的料重比显著低于Ⅰ、Ⅱ和Ⅵ组(P<0.05)。Ⅳ组母貂的平均日采食量极显著高于Ⅰ和Ⅱ组(P<0.01),Ⅰ、Ⅱ、Ⅲ、Ⅳ组母貂的料重比显著低于Ⅵ组(P<0.05)。2)Ⅲ组公貂的粗蛋白质消化率显著高于Ⅱ、Ⅴ组(P<0.05),Ⅲ、Ⅳ、Ⅴ、Ⅵ组公貂的钙消化率极显著高于Ⅰ、Ⅱ组(P<0.01)。Ⅳ组母貂的粗蛋白质消化率显著高于Ⅰ、Ⅱ组(P<0.05)。3)Ⅳ、Ⅴ、Ⅵ组公貂的尿氮显著低于Ⅰ组(P<0.05),Ⅳ组公貂的沉积氮显著高于其余各组(P<0.05),Ⅲ、Ⅳ、Ⅵ组公貂的蛋白质生物学价值显著高于Ⅱ组(P<0.05)。综上所述,在水貂饲粮中添加适量的维生素C能够提高水貂的生长性能、养分消化率和氮代谢水平。育成期水貂饲粮中维生素C适宜添加水平为50~100 mg/kg。
This experiment was conducted to study the effects of vitamin c on growth performance,nutrient digestibilities and nitrogen metabolism of growing minks.One hundred and twenty 60-day-old growing minks were randomly divided into 6 groups with 20 minks in each group(10 male minks and 10 female minks).Minks in groupⅠ(control group)were fed a basic diet,and others in groupsⅡ,Ⅲ,Ⅳ,ⅤandⅥwere fed basic diets supplemented with 25,50,100,200 and 400 mg/kg vitamin C,respectively.The pre-experimental period lasted for 7 days,and the experimental period lasted for 58 days.The results showed as follows:1)the average daily feed intake of male minks in groupⅣwas significantly higher than that in groupsⅠandⅢ(P<0.01),and significantly higher than that in groupsⅡ,ⅤandⅥ(P<0.05);the feed to gain ratio of male minks in groupⅢwas significantly lower than that in groupsⅠ,ⅡandⅥ(P<0.05).The average daily feed intake of female minks in groupⅣwas significantly higher than that in groupsⅠandⅡ(P<0.01),and the feed to gain ratio of female minks in groupsⅠ,Ⅱ,ⅢandⅣwas significantly lower than that in groupⅣ(P<0.05).2)The crude protein digestibility of male minks in groupⅢwas significantly higher than that in groupsⅡandⅤ(P<0.05),and the calcium digestibility of male minks in groupsⅢ,Ⅳ,ⅤandⅥwas significantly higher than that in groupsⅠandⅡ(P<0.01).The crude protein digestibility of female minks in groupⅢwas significantly higher than that in groupsⅠandⅡ(P<0.05).3)The urine nitrogen of male minks in groupsⅣ,ⅤandⅥwas significantly lower than that in groupⅠ(P<0.05),the nitrogen deposition of male minks in groupⅣwas significantly higher than that in the other groups(P<0.05),and the biological value of protein of male minks in groupsⅢ,ⅣandⅥwas significantly higher than that of groupⅡ(P<0.05).In conclusion,dietary appropriate amount of vitamin C can improve the growth performance and nutrient digestibilities of minks,and improve the nitrogen metabolism level.The suitable dietary supplemental level of vitamin C of growing minks is 50 to 100 mg/kg.
作者
徐燕红
李柯汝
慈洋
李文立
XU Yanhong;LI Keru;CI Yang;LI Wenli(College of Animal Science and Technology,Qingdao Agricultural University,Qingdao 266109,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2020年第9期4302-4308,共7页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
山东省现代农业产业技术体系特种经济动物创新团队营养与饲料岗位专家专项基金(SDAIT-21-04)
青岛农业大学2018年度研究生创新计划项目(QYC201831)。
关键词
维生素C
水貂
生长性能
养分消化率
氮代谢
vitamin C
minks
growth performance
nutrient digestibilities
nitrogen metabolism
