کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2453915 | 1110359 | 2012 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparison of alternative backgrounding systems on beef calf performance, feedlot finishing performance, carcass traits, and system cost of gain1
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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![عکس صفحه اول مقاله: Comparison of alternative backgrounding systems on beef calf performance, feedlot finishing performance, carcass traits, and system cost of gain1 Comparison of alternative backgrounding systems on beef calf performance, feedlot finishing performance, carcass traits, and system cost of gain1](/preview/png/2453915.png)
چکیده انگلیسی
A 3-yr experiment was conducted to evaluate the effects of swath grazing forage barley (Hordeum vulgare; cv. Ranger) or foxtail millet (Setaria italica; cv. Golden German) compared with grass-legume hay fed in drylot pens on beef calf performance during backgrounding and finishing phases. Annually, 120 spring-born Angus-cross stocker calves (60 steers, 60 heifers; BW = 227.6 ± 3.5 kg) were randomly allocated to 1 of 3 replicated (n = 2) backgrounding (BG) systems. Backgrounding systems were 1) swathed barley grazing (BAR), 2) swathed millet grazing (MILL), and 3) ground hay bunk fed in drylot (DL). All calves were supplemented with a 16% CP range pellet (2.5 kg/d). Swath-grazed calves were limit grazed using electric fencing in 4-ha paddocks with a 3-d grazing period for 96 d each year. Following BG, calves were placed in a feedlot, separated by BG treatment, and fed a similar finishing diet for 155 d and harvested at a targeted endpoint of 12 mm of rib fat. Forage samples were collected every 21 d and analyzed for DM, CP, and DE. Digestible energy content was greatest (P < 0.05) for swathed barley (10.0 MJ/ kg) and lowest for DL hay (8.4 MJ/kg). Stocker ADG during BG was greatest (P < 0.05) for BAR (0.8 kg/d) compared with MILL (0.6 kg/d), and DMI of BAR calves (7.8 kg/d) was numerically greater (P = 0.32) than MILL (6.8 kg/d) or DL calves (7.5 kg/d). Cost of gain for the BAR system ($1.70/kg) was 31% less (P < 0.05) compared with the MILL ($2.45/kg) or DL ($2.47/kg) system, suggesting swath grazing whole plant barley with beef calves may be more cost effective. There were no differences (P > 0.05) in final feedlot BW, total feedlot ADG, rib or rump fat, carcass characteristics, or feedlot cost of gain of calves from the 3 backgrounding systems. This experiment indicates that backgrounding calves on swathed barley or millet in field paddocks will not adversely affect feedlot performance or carcass characteristics compared with backgrounding calves in a traditional DL system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 28, Issue 5, October 2012, Pages 541-551
Journal: The Professional Animal Scientist - Volume 28, Issue 5, October 2012, Pages 541-551
نویسندگان
R. Kumar, H.A. Lardner, J.J. McKinnon, D.A. Christensen, D. Damiran, K. Larson,