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Titolo:
Postweaning and performance of calves from Angus, Brahman, reciprocal-cross tall fescue cows grazing endophyte-infected or common bermudagrass
Autore:
Brown, MA; Phillips, WA; Brown, AH; Coleman, SW; Jackson, WG; Miesner, JR;
Indirizzi:
ARS, USDA, Grazinglands Res Lab, El Reno, OK 73036 USA ARS El Reno OK USA73036 SDA, Grazinglands Res Lab, El Reno, OK 73036 USA Univ Arkansas, Fayetteville, AR 72701 USA Univ Arkansas Fayetteville AR USA 72701 ansas, Fayetteville, AR 72701 USA ARS, USDA, Dale Bumpers Small Farms Res Ctr, Booneville, AR 72927 USA ARSBooneville AR USA 72927 Small Farms Res Ctr, Booneville, AR 72927 USA
Titolo Testata:
JOURNAL OF ANIMAL SCIENCE
fascicolo: 1, volume: 77, anno: 1999,
pagine: 25 - 31
SICI:
0021-8812(199901)77:1<25:PAPOCF>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBSEQUENT FEEDLOT PERFORMANCE; X ENVIRONMENT INTERACTIONS; CARCASS TRAITS; BEEF-CATTLE; BODY-COMPOSITION; BIOLOGICAL TYPES; STEERS; PASTURES; HETEROSIS; GROWTH;
Keywords:
Brahman; heterosis; maternal effects; Festuca arundinacea; genotype environment interaction; postweaning interval;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Brown, MA ARS, USDA, Grazinglands Res Lab, El Reno, OK 73036 USA ARS El Reno OK USA 73036 nglands Res Lab, El Reno, OK 73036 USA
Citazione:
M.A. Brown et al., "Postweaning and performance of calves from Angus, Brahman, reciprocal-cross tall fescue cows grazing endophyte-infected or common bermudagrass", J ANIM SCI, 77(1), 1999, pp. 25-31

Abstract

Data from 403 Polled Hereford-sired calves from Angus, Brahman, and reciprocal-cross cows were used to evaluate the effects of preweaning forage environment on postweaning performance. Calves were spring-born in 1991 to 1994and managed on either endophyte-infected tall fescue (E+) or common bermudagrass (BG) during the preweaning phase. After weaning, calves were shippedto the Grazinglands Research Laboratory, El Reno, OK and stratified to oneof two winter stocker treatments by breed and preweaning forage; stocker treatments were winter wheat pasture (WW) or native range plus supplemental CP (NR). Each stocker treatment was terminated in March, calves grazed cool-season grasses, and calves were then moved to a feedlot phase in June. In the feedlot phase, calves were fed to approximately 10 mm fat over the 12thrib and averaged approximately 115 d on feed. When finished, calves were weighed and shipped to Amarillo, TX for slaughter. Averaged over calf breed group, calves from E+ gained faster during the stocker phase (P < .10), hadlighter starting and finished weights on feed(P < .01), lighter carcass weights (P < .01), and smaller longissimus muscle areas (P < .05) than calvesfrom BG. Calves from E+ were similar to calves from BG in feedlot ADG, percentage kidney, heart, and pelvic fat, fat thickness over 12th rib, yield grade, marbling score, and dressing percentage. Maternal heterosis was larger in calves from E+ for starting weight on feed (P < .01), finished weight (P < .10), and carcass weight (P < .16). These data suggest that few carryover effects from tall fescue preweaning environments exist, other than lighter, but acceptable, weights through slaughter. These data further suggest that the tolerance to E+ in calves from reciprocal-cross cows, expressed inweaning weights, moderated postweaning weight differences between E+ and BG compared to similar comparisons in calves from purebred cows.

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Documento generato il 02/10/20 alle ore 01:54:14