动物营养学报Issue(3)：667-674,8.DOI:10.3969/j.issn.1006-267x.2014.03.016
奶牛乳中脂肪蛋白质比和尿素氮含量与繁殖性能的相关性分析
Correlation Analysis Between Milk Fat to Protein Ratio, Milk Urea Nitrogen Content and Reproductive Performance in Cows
摘要
Abstract
To explore the effects of milk fat to protein ratio ( FPR) and milk urea nitrogen ( MUN) content in 7 days before service of cows on reproductive performance, a total of 1 460 of the first lactation Holstein cows which calving in the close periods were chosen. The milk samples were collected in 7 days before service, and the daily milk yield, milk composition and MUN content were detected for the selected cows. At the same time, the reproductive performance ( days in milk for the first service, number of service, pregnant rate, and days in milk for pregnancy) of these cows were detected. The effects of FPR and MUN content on the repro-ductive performance were analyzed using multivariate analysis of variance, Logistic regression analysis, corre-lation and regression analysis. The results showed as follows:the FPR and MUN content in 7 days before serv-ice were (1. 35 ± 0. 28) and (10. 61 ± 2. 68) mg/dL, respectively. The FPR had a significant effect on days in milk for the first service ( P<0 . 01 ) , but had no significant effect on the other reproductive performance in-dexes ( P>0 . 05 ) . The MUN content had significant effects on days in milk for the first service ( P<0 . 01 ) , number of service and pregnant rate ( P<0 . 05 ) , but had no significant effect on days in milk for pregnancy ( P>0 . 05 ) . The significantly negative correlationships between FPR and days in milk for the first service and days in milk for pregnancy were observed ( P<0 . 01 ) . There were significantly positive correlations between MUN content and days in milk for the first service and pregnant rate ( P<0 . 01 ) . The MUN content had sig-nificant effects on pregnant or not in the first or the first two estrous cycles ( P<0 . 05 ) . The MUN content in 7 days before service for the first lactation Holstein cows has significant effects on number of service and days in milk for the first service, and it can be used as one of the methods in the prediction and management of dairy cattle reproductive performance.关键词
乳中尿素氮/乳中脂肪蛋白质比/奶牛/繁殖性能Key words
MUN/FPR/cows/reproductive performance分类
农业科技引用本文复制引用
廖想想,陈丹,张美荣,蔡志勇,杨章平,杨利国,刘坤,陈亮,毛永江..奶牛乳中脂肪蛋白质比和尿素氮含量与繁殖性能的相关性分析[J].动物营养学报,2014,(3):667-674,8.基金项目
国家自然科学基金(31272407 （）
31372286) （）
江苏省苏北科技专项(BN2013038) （BN2013038）
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
扬州大学新世纪人才计划项目 （）
江苏省三新工程项目(SXGC[2013]029) （SXGC[2013]029）
