کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8982597 | 1553859 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Use of pymarc as a nitrogen source for grazing dairy calves
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A study was conducted to determine optimal levels of pymarc inclusion as a protein supplement to Chloris gayana during the dry season. Forty Friesian dairy calves of 65 ± 7 kg weight, 20 each of males and females, were randomly allocated to a 10-diet treatment in a completely randomized design in a factorial arrangement. The treatment diets were: control, 7.5, 15, 22.5, and 30 g DM/kg W0.75 pymarc, with (PBM) or without molasses (PB). Live weight gains, intake, diet digestibility, rumen pH, and rumen ammonia nitrogen were assessed in the 60-day experiment. Herbage intake did not differ (P > 0.05) among the treatments. Total intake was in the range of 2072-2636 g/day, diet digestibility 565-582 g/kg, and ADG 157-330 g/day, and differed (P < 0.05) with supplementation. The results showed that rumen pH did not differ significantly (P > 0.05) between the treatments, ranging between 6.97 and 7.17. Rumen NH3-N control groups PB and PBM had 109.9 and 106.5 mg/l, respectively, while those supplemented increased linearly (P < 0.05) to 166.5 and 177.14 mg/l, respectively, at the highest level of supplementation. The nutritional profile and potential degradation level of pymarc as well as the performance of calves indicate the latent value as a supplement in providing nitrogen to poor-quality basal diets in the dry season.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Livestock Production Science - Volume 96, Issues 2â3, 30 September 2005, Pages 233-238
Journal: Livestock Production Science - Volume 96, Issues 2â3, 30 September 2005, Pages 233-238
نویسندگان
J.M. Waweru, S.A. Abdulrazak, T.A. Onyango, T. Fujihara,