中国畜牧兽医2024，Vol.51Issue(7)：2871-2879,9.DOI:10.16431/j.cnki.1671-7236.2024.07.013
饲粮中添加大豆异黄酮对安格斯肉牛生产及繁殖性能的影响
Effect of Dietary Addition of Soy Isoflavones on Production and Reproductive Performance of Angus Beef Cattle
摘要
Abstract
[Objective]The aim of this experiment was to study the effects of adding different levels of soy isoflavones to feed rations on the growth performance,serum biochemical indexes,antioxidant capacity,immune performance and reproductive hormones of Angus beef cattle,and explore the appropriate amount of soy isoflavones to be used in the practice of beef cattle production.[Method]Forty healthy Angus heifers with similar body weight and 2-3 lactations were randomly divided into 4 groups of 10 heifers each.The cattle in control group was fed a basal diet,while cattle in groups Ⅰ,Ⅱ and Ⅲ were given 10,20 and 40 mg/kg of soy isoflavones in diet,respectively.The cattle were weighed at the beginning and at the end of the experiment,and the feed intake was recorded daily to calculate the average daily feed intake(ADFI),average daily gain(ADG)and feed-to-gain ratio(F/G).At 40th days,blood samples were collected for the detection of serum biochemistry,antioxidant,immune indexes and reproductive hormone level.[Result]Compared with control group,①The addition of soy isoflavones in each experiment group had no significant effect on ADFI,ADG and F/G in Angus beef cattle(P＞0.05).② The total protein content of bovine serum in groups Ⅰ and Ⅱ was significantly increased(P＜0.05),and the glutamine aminotransferase activity was significantly decreased(P＜0.05).The contents of total protein and globulin of bovine serum in group Ⅲ were extremely significantly increased(P＜0.01),and the activities of glutamic oxaloacetic transaminase and glutamic alanine aminotransferase were extremely significantly decreased(P＜0.01).The levels of immunoglobulin(IgA,IgM and IgG)and interferon-y of bovine serum in group Ⅲ were extremely significantly or significantly increased(P＜0.01 or P＜0.05).③The total antioxidant capacity(T-AOC)and glutathione peroxidase(GSH-Px)activity of bovine serum in group Ⅱ were extremely significantly increased(P＜0.01).The T-AOC,GSH-Px and superoxide dismutase levels of bovine serum in group m were extremely significantly increased(P＜0.01),and the malondialdehyde content was extremely significantly decreased(P＜0.01).④ The estradiol level of bovine serum in group Ⅱ was significantly increased(P＜0.05).The levels of progesterone,estradiol,follicle stimulating hormone and luteinizing hormone of bovine serum in group Ⅲ were extremely significantly increased(P＜0.01).[Conclusion]Addition of soy isoflavones to feed was found to be effective in improving the immune function and reproductive performance of Angus beef cattle,and the best results were obtained at a level of 40 mg/kg.关键词
安格斯肉牛/大豆异黄酮/生长性能/免疫功能/抗氧化能力Key words
Angus beef cattle/soy isoflavones/growth performance/immune function/antioxidant capacity分类
农业科技引用本文复制引用
丁辉,刘欣,王瑞玲,毛永霞,王建东,郭延生..饲粮中添加大豆异黄酮对安格斯肉牛生产及繁殖性能的影响[J].中国畜牧兽医,2024,51(7):2871-2879,9.基金项目
宁夏回族自治区农业高质量发展和生态保护科技创新示范课题-肉牛高效繁殖技术研究(NGSB-2021-12-03) （NGSB-2021-12-03）
