饲料研究2024，Vol.47Issue(12)：7-11,5.DOI:10.13557/j.cnki.issn1002-2813.2024.12.002
酵母核苷酸对奶牛生产性能、乳品质、血清指标及经济效益的影响
Effects of yeast nucleotides on production performance,milk quality,serum indexes and economic benefits of dairy cows
摘要
Abstract
The experiment aimed to investigate the effects of yeast nucleotides on the production performance,milk quality,serum indexes,and economic benefits of dairy cows.Forty healthy Holstein cows with similar body weight,parity,and milk yield were selected and randomly divided into four groups with ten replicates in each group and one cow in each replicate.The control group was fed a basal diet,while the experimental group 1,group 2,and group 3 were supplemented with 0.2％,0.4％,and 0.8％yeast nucleotides in the basal diet,respectively.The pretrial period was 10 days,and the formal experimental period was 60 days.The results showed that compared to the control group,the average daily feed intake of cows in experimental group 3 significantly increased(P＜0.05).The average daily milk yield of cows in experimental group 2 and group 3 significantly increased(P＜0.05),and the feed-to-milk ratio of cows in experimental group 2 significantly decreased(P＜0.05).Compared to the control group,the milk fat percentage of fresh milk from cows in experimental group 2 significantly increased(P＜0.05),the total somatic cell count in the milk of all experimental groups significantly decreased(P＜0.05).The incidence of mastitis in dairy cows in the experimental group was 0,which was significantly lower than that in the control group(P＜0.05).The serum immunoglobulin G(IgG)content of cows in experimental group 2 and group 3 was significantly higher than that of the control group(P＜0.05).The gross profit of experiment group 2 was 12.07％higher than that of control group,and the economic benefit was obviously improved.The study indicates that feeding yeast nucleotides can improve the production performance and milk quality of dairy cows,improve serum indexes,and enhance economic benefits,with a recommended addition of 0.4％of yeast nucleotides of feed.关键词
酵母核苷酸/奶牛/生产性能/乳品质/血清指标/经济效益Key words
yeast nucleotides/dairy cows/production performance/milk quality/serum indexes/economic benefits分类
农业科技引用本文复制引用
陈晓春,黄小权,汤亦文,张磊..酵母核苷酸对奶牛生产性能、乳品质、血清指标及经济效益的影响[J].饲料研究,2024,47(12):7-11,5.基金项目
国家自然科学基金项目(项目编号:21606128) （项目编号:21606128）
