کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2454409 | 1110388 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Weaning Age of Dairy Calves Fed a Conventional or More Optimum Milk Replacer Program
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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چکیده انگلیسی
Comparisons of different weaning ages of calves fed high-protein, high-feeding-rate milk replacer (MR) programs have not been reported in the literature. Thus, the objectives of these trials were to compare the performance of calves fed either a conventional MR [0.454 kg of a 22% CP, 20% fat (as fed) MR powder daily; MR A] or a more optimum MR [0.681 kg of a 26% CP, 17% fat (as fed) MR powder daily; MR B] and weaning them at either 28 or 42 d. Trial 1 evaluated the weaning age of calves fed MR A or B. Trial 2 compared the weaning age of calves fed MR B. Holstein calves were fed an 18% CP starter and fresh water ad libitum throughout the 56-d trials. In trial 1, calves fed MR B had 50% greater ADG, consumed 24% more starter, were 13% more efficient, and had 68% more hip width change than calves fed MR A (P < 0.05). Calves weaned at 28 d consumed 36% more starter than calves weaned at d 42 (P < 0.05). In trial 2, calves weaned at 28 d consumed 25% more starter than calves weaned on d 42 (P < 0.05). Weaning age did not affect BW gain by 56 d in either trial. A meta-analysis of published data using MR B revealed that weaning age did not change ADG through d 56, but calves weaned at 28 d consumed more starter and had a lower feed efficiency than calves weaned at 42 d.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 25, Issue 5, October 2009, Pages 619-624
Journal: The Professional Animal Scientist - Volume 25, Issue 5, October 2009, Pages 619-624
نویسندگان
T.M. Hill, H.G. II, J.M. PAS, R.L. Schlotterbeck,