奶牛精液按性别分离--Effects on reproductive and lactational performances

牧童

Effects of continuous milking during the dry period or once daily milking in the first 4 weeks of lactation on metabolism and productivity of dairy cows

G. Schlamberger*, S. Wiedemann*, E. Viturro*, H.H.D. Meyer*, M. Kaske†


Received 14 October 2009; accepted 9 February 2010.

Abstract
The objective was to compare the effects of 3 management systems in high-yielding dairy cows on metabolic profiles and milk production. Thirty-six multiparous Brown Swiss cows were randomly assigned to 1 of 3 treatment groups (n=12 cows/group): the control (C) group, in which cows were dried off 56 d before calving and milked twice daily throughout next lactation (305 d); the once daily milking (ODM) group, in which cows were dried off 56 d before calving and milked once daily for the first 4 wk of lactation and twice daily for the remaining lactation; and the continuous milking (CM) group, in which cows were milked twice daily until calving and also during the subsequent lactation. Serum glucose concentrations decreased between wk 1 and 4 exclusively in C cows. Serum concentrations of NEFA and BHBA in the first 4 wk of lactation were highest in C cows compared with ODM and CM cows. Decreased backfat thickness during early lactation and reduction of body condition score were markedly more pronounced in C cows compared with ODM and CM cows. Mean lactational milk yield of C cows [11,310±601kg of energy-corrected milk (ECM)/305 d] was approximately 16% higher compared with ODM cows (9,531±477kg of ECM/305 d) and CM cows (9,447±310kg of ECM/305 d). The lactation curve of CM cows compared with C cows was characterized by a similar time of peak yield (wk 3), a reduced peak yield, and no obvious differences in persistency. Mean percentage of milk protein was significantly higher for CM cows (3.91%) compared with C cows (3.52%). In contrast, once daily milking was accompanied by a reduced and significantly delayed peak yield (wk 8) compared with the control treatment, whereas persistency was better and milk protein (3.79%) was higher in ODM cows than in C cows. In conclusion, continuous milking and once daily milking, targeting the interval before or after calving, respectively, substantially reduced the metabolic challenge of fresh cows and improved milk protein percentage. Continuous milking and once daily milking increased milk protein percentage markedly; furthermore, once daily milking during the first 4 wk of lactation improved the lactation curve.

Key words: continuous milking, once daily milking, metabolism, productivity

beijingyiren

那位英语好帮忙翻译了？

牧童

那位英语好帮忙翻译了？
beijingyiren 发表于 2010-5-27 15:27

    我只是觉得这个资料不错，想向大家介绍一下，但是是在没时间来为大家翻译，所以只有英语好的同学去看吧

littleduck

英文的啊，专家给翻译一下哈

花花好

是性控啊。

lengyifu

只是个摘要呀

leiwenzheng168

影响在干燥期连续挤奶每日一次,或者在第4周挤奶的新陈代谢和生产力哺乳的奶牛
　　
　　将于2009年10月14日收到;接受9二月到2010年。
　　
　　摘要
　　目的是为了比较效果的3个管理系统在高产奶牛在新陈代谢概况和牛奶产量。36等布朗瑞士牛被随机分配到1 / 3组(12):牛/组控制(C)集团,牛的乾了56医之前,在calving挤奶每日两次哺乳(305 d)下,每天一次(ODM)挤奶的奶牛是集团、乾了56医之前calving挤奶每日一次,第4周的产妇和每日两次,其余哺乳,连续挤奶(CM)集团,牛的奶每日两次,直到calving也在泌乳期的。血清血糖浓度降低1周4只之间在C奶牛。血清中NEFA和BHBA在第4周中最高的哺乳被牛比起ODM和C的母牛。厘米,早期的哺乳期间降低背膘厚层厚度和减少身体状况更显著的显著成绩相比在C牛ODM母牛。厘米,牛奶产量的意思lactational[11,310±601kg C母牛的奶(ECM)energy-corrected / 375 d]大约16%高出具有ODM奶牛(9,531±477kg的ECM / 375 d)和厘米(9,447±310kg的母牛ECM / 375 d)。哺乳期曲线与C母牛相比牛厘米为类似的高峰时间(周产量,降低产量,并无明显峰差异。平均比例的牛奶蛋白显著高于厘米),比牛(3.91%牛(纵向),C。相反,每天一次挤奶的陪同下,降低产量和显著延缓峰(工作)与对照组比较,治疗持续性更好和牛奶蛋白(3.79%)是牛比C牛的转变。总之,连续挤奶,每日一次挤奶,目标区间之前或之后,分别calving代谢的挑战,大大减少了新鲜的牛和改进的牛奶蛋白的百分比。每日一次,连续挤牛奶蛋白的百分比显著增加挤奶。而且,每天一次在第4周挤奶的哺乳提高哺乳曲线。
　　
　　关键词:连续挤奶,每日一次挤奶、代谢、生产力

cupidhxp

谢谢楼上的