中国畜牧兽医2024，Vol.51Issue(1)：212-219,8.DOI:10.16431/j.cnki.1671-7236.2024.01.022
荷斯坦牛关键奶流速指标筛选及影响因素分析
Selection and Influencing Factors Analysis of Key Milking Flow Rate Indicators of Holstein Cattle
摘要
Abstract
[Objective]This study was aimed to investigate the variation of phenotype for milking flow rate traits and the correlation among the traits to identify the key indicator of milking flow rate.[Method]A total of 2 162 cows with 1 181 628 records of milking flow rate including milk yield per milking(MMY)and 11 milking flow rate indicators:Average flow rate(AFR),milking duration(MD),peak flow rate(PFR),proportion of low flow rate(PLFR),take off flow rate(TOFR),flow during the first 0-15 s(F0-15),flow during the first 15-30 s(F15-30),flow during the first 30-60 s(F30-60),flow during the first 60-120 s(F60-120),yield during the first 2 min(Y2M),and proportion of yield during the first 2 min(PY2M)were adopted.And the normality test,regression analysis,correlation analysis and influencing factors analysis were carried out between MMY and milking flow rate indicators.[Result]MMY and 11 milking flow rate indicators were all normal distribution.Among them,F0-15,F15-30,F30-60,F60-120,Y2M,PFR,AFR,and MD had positive regression relationship with MMY,and the variation pattern is consistent at the level of each factor.The correlation between these traits were significant with a coefficient from-0.80 to 0.95.The correlation analysis results indicated that AFR and Y2M could be used as key indicators of milk flow rate,showing a gradual increase trend with the increase of milk MMY.There were significant differences in different years,seasons,parities,lactation stages,and milking shifts(P＜0.05).[Conclusion]AFR and Y2M could be used as key indicators for evaluating milk flow rate indicators,but in actual production management,reference values for indicators need to be set based on changes in herd structure and environment.With refined management,higher reference thresholds could be gradually set for AFR and Y2M to achieve higher milk yield,thereby increasing economic benefits.关键词
奶流速/班次奶量/荷斯坦牛Key words
milking flow rate/milk yield per milking/Holstein cattle分类
农业科技引用本文复制引用
陈少侃,罗汉鹏,马烨桦,刘刚,王迪,郝科比,王雅春,郭刚..荷斯坦牛关键奶流速指标筛选及影响因素分析[J].中国畜牧兽医,2024,51(1):212-219,8.基金项目
现代农业产业技术体系资助(CARS-36) （CARS-36）
北京三元种业科技股份有限公司自立科研课题(SYZYZ20210014) （SYZYZ20210014）
