کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6305757 | 1307150 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Herd Size-Dependent Effects of Restricted Foraging Time Allowance on Cattle Behavior, Nutrition, and Performance
ترجمه فارسی عنوان
اثرات وابسته به اندازه گله محدودیت زمان تحویل فوری برای رفتار گاو، تغذیه و عملکرد
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی
We tested the influence of herd size on the effects of restricted foraging time on cattle (Bos indicus) foraging behavior, nutrition, and performance in a Kenyan savanna rangeland. Using a randomized block design, we compared weight gain, forage intake, diet selection, dietary crude protein (CP) and digestible organic matter (DOM), bite and step rates, distance travelled, and activity time budgets between steers allowed unlimited foraging time (DNG) in predator-free areas with those herded diurnally in predator-accessible areas in large (200 steers; LDG), medium (150 steers; MDG), or small (100 steers; SDG) herds and corralled at night. Daily weight gain was greater (P < 0.01) in DNG (0.61 kg) or SDG (0.56 kg) than in LDG (0.19 kg) or MDG (0.29 kg) but did not differ (P = 0.591) between DNG and SDG. Likewise, daily organic matter intake was greater (P < 0.05) in DNG (6.2 kg) or SDG (5.4 kg) than in LDG (3.7 kg) or MDG (3.7 kg) but did not differ (P = 0.288) between DNG and SDG. Grazing time was lower (P < 0.01) in DNG (42.2%) than in LDG (71.3%), MDG (72.2%), or SDG (69.5%), while the reverse was the case for ruminating and/or resting time (47.1%, 12.1%, 11.9%, and 10.3% in DNG, LDG, MDG, and SDG, respectively). Bite rate was lower in DNG (13.1 bites · min- 1) than LDG (21.0 bites · min- 1; P = 0.068), MDG (27.7 bites · min- 1; P = 0.13) or SDG (26.2 bites · min- 1; P = 0.007). However, diet selection, CP, DOM, step rate, and distance travelled did not differ among treatments. Our findings demonstrate subdued negative effects of restricted foraging time when cattle are herded diurnally in small-sized herds. Application of this strategy could reduce the need for eliminating wild carnivores to facilitate unrestricted foraging time for cattle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rangeland Ecology & Management - Volume 68, Issue 4, July 2015, Pages 341-348
Journal: Rangeland Ecology & Management - Volume 68, Issue 4, July 2015, Pages 341-348
نویسندگان
Wilfred O. Odadi, Daniel I. Rubenstein,