کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10975012 | 1108030 | 2013 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of milking frequency on the behavior and productivity of lactating dairy cows
ترجمه فارسی عنوان
اثر فرکانس شیردوشی بر رفتار و بهره وری شیردهی
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کلمات کلیدی
گاو شیری، فرکانس شیردوشی، رفتار - اخلاق،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
The objective of this study was to determine the effect of milking frequency on the behavioral patterns and productivity of lactating dairy cows. Twelve freestall-housed, lactating Holstein dairy cows (7 primiparous and 5 multiparous) were exposed to each of 2 treatments (over 21-d periods) in a replicated crossover design. Treatments were milking frequency of 2Ã/d (at 0600 and 1800Â h) or 3Ã/d (at 0600, 1400, and 2200Â h). Milk production, feeding, lying, and rumination behavior were monitored for each animal for the last 7Â d of each treatment period. Milk samples were collected for the last 3Â d of each period for milk component analysis. The results indicated that cows milked 3Ã/d produced 2.9Â kg/d more milk than those milked 2Ã/d. Primiparous cows consumed 3.9Â kg/d less dry matter (DM) than did multiparous cows. The extra time (14.6Â min/d) required for milking 3Ã/d altered the distribution of cow behavioral activity throughout the day. Although this did not affect total daily lying or rumination time, we observed a tendency for cows milked 2Ã/d to spend less time (224.6 vs. 237.5Â min/d) feeding and, thus, those cows tended to consume their feed at a faster rate (0.13 vs. 0.12Â kg of DM/min) than cows milked 3Ã/d. For multiparous cows, the increase in feeding activity was facilitated through having longer (40.1 vs. 36.8Â min/meal) and numerically larger meals (4.8 vs. 4.6Â kg of DM/meal) when milked 3Ã/d. Alternatively, primiparous cows consumed smaller (2.9 vs. 3.2Â kg of DM/meal) and more frequent meals (9.1 vs. 7.7 meals/d) throughout the day when milked 3Ã/d, resulting in a tendency for greater DM intake (24.7 vs. 23.6Â kg/d) compared with primiparous cows milked 2Ã/d. These results indicate that under 3Ã/d milking schedules, primiparous cows will positively adjust their feeding behavior to achieve similar production increases as multiparous cows. In summary, milking 3Ã/d can be used to improve production; however, greater milking frequency elicits varying effects on the behavior of primiparous and multiparous cows, suggesting that grouping and management of cows based on parity may be beneficial.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 96, Issue 11, November 2013, Pages 6973-6985
Journal: Journal of Dairy Science - Volume 96, Issue 11, November 2013, Pages 6973-6985
نویسندگان
K.D. Hart, B.W. McBride, T.F. Duffield, T.J. DeVries,