奶牛精液按性別分離--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

那位英語好幫忙翻譯了？

牧童

那位英語好幫忙翻譯了？
beijingyiren 發(fā)表于 2010-5-27 15:27

    我只是覺得這個資料不錯，想向大家介紹一下，但是是在沒時間來為大家翻譯，所以只有英語好的同學去看吧

littleduck

英文的啊，專家給翻譯一下哈

花花好

是性控啊。

lengyifu

只是個摘要呀

leiwenzheng168

影響在干燥期連續(xù)擠奶每日一次,或者在第4周擠奶的新陳代謝和生產(chǎn)力哺乳的奶牛
　　
　　將于2009年10月14日收到;接受9二月到2010年。
　　
　　摘要
　　目的是為了比較效果的3個管理系統(tǒng)在高產(chǎn)奶牛在新陳代謝概況和牛奶產(chǎn)量。36等布朗瑞士牛被隨機分配到1 / 3組(12):牛/組控制(C)集團,牛的乾了56醫(yī)之前,在calving擠奶每日兩次哺乳(305 d)下,每天一次(ODM)擠奶的奶牛是集團、乾了56醫(yī)之前calving擠奶每日一次,第4周的產(chǎn)婦和每日兩次,其余哺乳,連續(xù)擠奶(CM)集團,牛的奶每日兩次,直到calving也在泌乳期的。血清血糖濃度降低1周4只之間在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,早期的哺乳期間降低背膘厚層厚度和減少身體狀況更顯著的顯著成績相比在C牛ODM母牛。厘米,牛奶產(chǎn)量的意思lactational[11,310±601kg C母牛的奶(ECM)energy-corrected / 375 d]大約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)。哺乳期曲線與C母牛相比牛厘米為類似的高峰時間(周產(chǎn)量,降低產(chǎn)量,并無明顯峰差異。平均比例的牛奶蛋白顯著高于厘米),比牛(3.91%牛(縱向),C。相反,每天一次擠奶的陪同下,降低產(chǎn)量和顯著延緩峰(工作)與對照組比較,治療持續(xù)性更好和牛奶蛋白(3.79%)是牛比C牛的轉(zhuǎn)變?？傊?連續(xù)擠奶,每日一次擠奶,目標區(qū)間之前或之后,分別calving代謝的挑戰(zhàn),大大減少了新鮮的牛和改進的牛奶蛋白的百分比。每日一次,連續(xù)擠牛奶蛋白的百分比顯著增加擠奶。而且,每天一次在第4周擠奶的哺乳提高哺乳曲線。
　　
　　關鍵詞:連續(xù)擠奶,每日一次擠奶、代謝、生產(chǎn)力

cupidhxp

謝謝樓上的