产犊季节和胎次对测定奶牛日泌乳性能的影响  

The Influence of Calving Seasons and Parity on Test Day Milking Performances of Cow

作　　者：刘姗[1] 刘念锐 陈佩琪 王广斌 朱怡慧[1] 李蕊[1] 杨章平[1] 毛永江[1] 

机构地区：[1]扬州大学动物科学与技术学院,江苏扬州225009 [2]徐州绿健乳业有限责任公司,江苏徐州221007

出　　处：《中国牛业科学》2013年第2期27-30,共4页China Cattle Science

基　　金：江苏省苏北专项(BN2011016);江苏省科技支撑计划(BN2010002);扬州大学科技创新培育基金(2011CXJ059)

摘　　要：[目的]通过研究产犊季节、胎次对奶牛测定日泌乳性能的影响,以期为指导日粮配方调整、增加牛奶产量和提升原料奶质量提供科学依据。[方法]采集江苏某奶牛场2012年度408头奶牛共3 012条生产性能测定记录,用线性模型分析产犊季节和胎次对测定日产奶量、乳脂率、乳蛋白率、脂蛋比、305d产奶量及体细胞评分的影响进行分析。[结果]表明:不同产犊季节对测定日产奶量和305d产奶量的影响极显著(P<0.01),对乳脂率、乳蛋白率、脂蛋比无显著影响;不同胎次除对乳脂率影响显著外(P<0.05),对其它奶牛泌乳性能及体细胞评分均影响极显著(P<0.01)。[结论]夏、秋两季产犊奶牛的305d产奶量高;2～3胎产犊奶牛的泌乳性能较佳,随着胎次的增加,特别是5胎及以后,泌乳性能的各项指标都有不同程度的降低。[ObjectivelThe influence of different calving seasons and parity on test day lactation per- formance was analyzed for the adjustment of guidance of diet, increasing milk production and the scientific basis to enhance the quality of raw milk. [Method]The lactation performance contains 3012 test day milk yield, fat and protein, fat-to-protein ratio, SCS, and 305-day milk yield from 408 calving cows＇ DHI records. [Result Objective]The results showed that different calving seasons had significant effect on test day milk yield and 305-day milk yield （P〈0.01）, hut no significant effect on fat, protein, and FPR （fat-to-protein ratio）. Parity also had significant effect on all the other lactation performance （P〈0.01） of cows except fat （P〈0.05）. [Conclusion]The 305-day milk yield of calving cows in Ssummer and autumn were better. The lactation performance of the second to the third calving cows increased with parity,but reduced in different degree with the increasing of parity,especially after the 5th parity.

关 键 词：产犊季节 胎次 泌乳性能 奶牛群改良 

分 类 号：S823.2[农业科学—畜牧学]