کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10161856 | 1110357 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interactions of shade and feeding management on feedlot performance of crossbred steers during seasonal periods of high ambient temperature
ترجمه فارسی عنوان
تعاملات سایه و تغذیه بر عملکرد فیدل کوهنوردان در طی دوره های فصلی دمای بالا
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کلمات کلیدی
بار حرارتی، سایه، برنامه تغذیه، گاو
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
Three experiments were conducted to evaluate the influence of shade and feeding management on performance of crossbred steers during periods of high ambient temperature. Exp. 1 evaluated the influence of shade (0 vs. 3.3 m2/steer) on growth performance and dietary NE. Air temperature and humidity averaged 29.7 °C and 44%, respectively. Shade improved DMI (6%, P < 0.10) and ADG (9%, P < 0.05). Exp. 2 and 3 evaluated the interaction of shade (0 vs. 2.4 m2/steer) and feeding schedule (providing 70% of DMI at 0630 vs. 1430 h). Air temperature and humidity for both studies averaged 31 °C and 41%. In Exp. 2, providing shade increased (P < 0.05) DM and water intake (5 and 30%, respectively). There were interactions (P < 0.05) between shade and feeding schedule on ADG, gain efficiency, and dietary NE. In the absence of shade, providing 70% of DMI in the afternoon increased ADG (22%), gain efficiency (14%), and dietary NE (6%). However, in the presence of shade, feeding schedule did not affect cattle performance or dietary NE. In Exp. 3, providing shade increased ADG (14%, P < 0.10), gain efficiency (10%, P < 0.05), and dietary NE (6%; P < 0.05). Providing 70% of DMI in the afternoon did not affect (P > 0.20) ADG but increased (4%, P < 0.10) dietary NE. It is concluded that both provision of shade and management of feeding schedule are effective tools for improving growth-performance and efficiency of energy use in feedlot cattle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 29, Issue 6, December 2013, Pages 645-651
Journal: The Professional Animal Scientist - Volume 29, Issue 6, December 2013, Pages 645-651
نویسندگان
R. Barajas, P. Garces, R.A. Zinn,