γ-聚谷氨酸对断奶犊牛血清生化指标的影响

doi:10.12160/j.issn.1672-5190.2021.02.007

畜牧与饲料科学 ›› 2021, Vol. 42 ›› Issue (2): 37-41.doi: 10.12160/j.issn.1672-5190.2021.02.007

γ-聚谷氨酸对断奶犊牛血清生化指标的影响

朱春侠¹, 凤英¹, 张金文², 成立新¹, 胡明¹, 杜瑞平¹, 赵霞¹, 杨坤¹, 张兴夫¹

1.内蒙古自治区农牧业科学院,内蒙古呼和浩特 010031;
2.呼和浩特市家畜改良工作站,内蒙古呼和浩特 010020

收稿日期:2020-12-26 出版日期:2021-03-30 发布日期:2021-04-16
通讯作者: 张兴夫（1982—）,男,副研究员,博士,主要研究方向为肉牛繁殖与营养。
作者简介:朱春侠（1983—）,女,副研究员,硕士,主要研究方向为农业自动化及智能控制。
基金资助:
内蒙古农牧业创新基金项目（2020CXJJM02）; 内蒙古自治区科技计划项目（2019GG353）

Effects of Dietary Supplementation of γ-polyglutamic Acid on Serum Biochemical Parameters of Weaned Calves

ZHU Chun-xia¹，Fengying¹，ZHANG Jin-wen²，CHENG Li-xin¹，HU Ming¹，DU Rui-ping¹，ZHAO Xia¹，YANG Kun¹，ZHANG Xing-fu¹

1. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences，Hohhot 010031，China；
2. Hohhot Livestock Breed Improvement Work Station，Hohhot 010020，China

Received:2020-12-26 Online:2021-03-30 Published:2021-04-16

摘要/Abstract

摘要： [目的] 研究γ-聚谷氨酸对断奶犊牛血清生化指标的影响。[方法] 将体重相近的荷斯坦断奶犊牛16头,按同质原则分为对照组和试验组,每组8头。两组犊牛每天每头饲喂3 kg颗粒饲料,玉米秸秆随意采食。试验组颗粒饲料中按照千分之五的比例加入γ-聚谷氨酸（膏状液体,含量为20%）。试验时间70 d,预试期10 d,正试期60 d。在试验最后一天采集血液样品测定血清生化指标。[结果] 对照组犊牛血清中IgG、IgA和IgM含量显著（P<0.05）高于试验组;对照组犊牛血清中SOD、GSH-Px活性显著（P< 0.05）高于试验组;两组AST与ALT活性差异不显著（P>0.05）;对照组和试验组犊牛血清中TP、ALB、BUN、NEFA、GLU、Ca、P、Fe、Zn含量差异不显著（P>0.05）,试验组断奶犊牛血清中Cu、VA和VC含量显著（P<0.05）低于对照组。[结论] ①γ-聚谷氨酸会降低断奶犊牛血清中免疫球蛋白（IgG、IgM、IgA）的含量;②γ-聚谷氨酸有提高断奶犊牛机体抗氧化能力的可能;③γ-聚谷氨酸可能会促进断奶犊牛对Cu、VA和VC的吸收与利用;④γ-聚谷氨酸未对断奶犊牛肝脏功能、能量代谢、能量平衡、蛋白质利用产生负面影响。

关键词: γ-聚谷氨酸, 断奶犊牛, 血清生化指标

Abstract: [Objective] To investigate the effects of dietary supplementation of γ-polyglutamic acid on serum biochemical parameters of weaned calves. [Method] A total of 16 weaned Holstein calves with similar weights were divided into control group and experimental group with 8 calves in each group according to the principle of homogeneity. Calves in the two groups were fed with 3 kg pellet feed per head per day, and corn stover was fed ad libitum. In the experimental group, γ-polyglutamic acid （pasted liquid, containing 20% γ-polyglutamic acid） was added to the pellet feed at the rate of 5 ‰. The experiment lasted for 70 days, including a 10-day-long pre-experimental period and a 60-day-long formal experimental period. Blood samples were collected on the last day of the trial to determine the serum biochemical parameters. [Result] The serum levels of IgG, IgA and IgM as well as the activities of serum SOD and GSH-Px of the control group were significantly （P<0.05） higher than those of the experimental group. There was no significant （P>0.05） difference in activities of AST and ALT between the control group and the experimental group. No significant （P>0.05） differences in serum contents of TP, ALB, BUN, NEFA, GLU, Ca, P, Fe and Zn between the control group and the experimental group were observed, while the serum contents of Cu, VA and VC of the experimental group were significantly （P<0.05） lower than those of the control group. [Conclusion] For weaned Holstein calves, dietary supplementation of γ-polyglutamic acid reduces their serum contents of immunoglobulin (IgG, IgM, IgA), has the potential to improve their antioxidant capacity, promotes their absorption and utilization of Cu, VA and VC, and exhibits no negative effects on their liver function, energy metabolism, energy balance and protein utilization.

Key words: γ-polyglutamic acid, weaned calves, serum biochemical parameters

中图分类号:

S823.5

朱春侠, 凤英, 张金文, 成立新, 胡明, 杜瑞平, 赵霞, 杨坤, 张兴夫. γ-聚谷氨酸对断奶犊牛血清生化指标的影响[J]. 畜牧与饲料科学, 2021, 42(2): 37-41.

ZHU Chun-xia，Fengying，ZHANG Jin-wen，CHENG Li-xin，HU Ming，DU Rui-ping，ZHAO Xia，YANG Kun，ZHANG Xing-fu. Effects of Dietary Supplementation of γ-polyglutamic Acid on Serum Biochemical Parameters of Weaned Calves[J]. Animal Husbandry and Feed Science, 2021, 42(2): 37-41.

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γ-聚谷氨酸对断奶犊牛血清生化指标的影响

Effects of Dietary Supplementation of γ-polyglutamic Acid on Serum Biochemical Parameters of Weaned Calves

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