应用DHI对某牛场奶牛泌乳天数与乳质的关系分析  

Application of DHI on the Relationship Analysis Between Lactation Days and Milking Characteristics of Dairy Cow

作　　者：王若勇 庄安宁 成辉 辛亚平[4] 

机构地区：[1]渭南市畜牧兽医局,陕西渭南714000 [2]蒲城县畜牧兽医局,陕西蒲城714000 [3]陕西农垦牧业发展有限公司奶牛养殖场,大荔715100 [4]西北农林科技大学动物科技学院,中国杨凌712100

出　　处：《中国牛业科学》2016年第5期14-17,共4页China Cattle Science

基　　金：西北农区奶牛健康养殖生产技术集成及产业化示范(2012BAD12B07);奶牛养殖关键技术示范和陕西省奶牛产业技术体系资助

摘　　要：[目的]在陕西农垦牧业发展有限公司奶牛场研究奶牛泌乳天数对产奶量和乳质的影响,从而得到奶牛产奶相关规律,并将信息反馈到牛场,指导和完善牛场管理,以提高奶牛生产性能。[方法]应用DHI技术。[结果]奶牛在整个泌乳期内,产奶量随着泌乳天数的增加呈现出先增加后减少的趋势,在第三个产奶月达到峰值,随后逐渐下降,直至泌乳结束。[结论]奶牛泌乳天数与乳蛋白率呈现显著正相关关系,与尿素氮含量呈极显著负相关关系,与乳脂率、乳糖含量及牛奶体细胞数间无显著相关关系。[Objective] The aim of this study was to investigate the effect of lactation days on milk yield and milking characteristics of dairy cow and conclude the related rule about milk performance, which could guide and improve the dairy farm management, thus improving the productive performances of dairy cow. [Method] The DHI techonology was applied in this experiment. [Result] With the increase of days during lactating, the milk yield increased firstly and then decreased during all the lactation periode. The milk yield was up to the peak value in the third month of lactating and decreased progressively in the later stage until the end of lactation. [Conclusion] It had a significant positive correlation between the lactation days and milk protein rate as well as a very significant negative correlation between the lactation days and urea nitrogen content. In addition, the lactation days was no significantly associated to the butterfat rate and milk lactose content and somatic cell count.

关 键 词：DHI体系 奶牛 产奶量 乳成分 体细胞数 

分 类 号：S823[农业科学—畜牧学]