Growing rate of gain on subsequent feedlot performance, meat, and carcass quality of beef steers1

Abstract

A.; Maddock, R. J.; Stamm, M. M.; Schauer, C. S.; Rush, Ivan G.; Quinn, S.; and Lardy, G. P., "Growing rate of gain on subsequent feedlot performance, meat, and carcass quality of beef steers" (2009 LG diet consisted of 52.5% barley silage, 39.0% whole shell corn, and 8.5% supplement, whereas the HG diet contained 43.9% barley silage, 47.4% whole shell corn, and 8.7% supplement (DM basis). Initial BW (226 kg) was not different (P = 0.70) between treatments. Steers fed the HG diet had increased ADG (1.67 vs. 1.40 kg/d; P < 0.001) compared with steers fed LG diet. Dry matter intake was greater (9.49 vs. 8.35 kg/d; P < 0.001) for steers fed the HG vs. LG diet. Total backgrounding cost ($/animal) was less (P < 0.001) for those steers fed LG diet compared with HG diet ($126.00 vs. $140.35, respectively); however, total cost per kilogram of BW gain was not different (P = 0.24; $0.485/kg of BW gain). After the backgrounding period, steers were fed a common finishing diet for 135 d. During the finishing period, LG steers had similar (P = 0.12; 10.73 vs. 10.35 kg/d) DMI compared with those fed HG diets; however, ADG was not different (1.55 kg; P = 0.72) among treatments. Hot carcass weight, marbling score, 12th-rib fat, LM area, and USDA yield grade were not different (P > 0.12) between treatments and averaged 363 kg, Sm 30 , 1.33 cm, 83.8 cm 2 , and 2.7, respectively. There were no differences (P = 0.77; 3.63 ± 0.12 kg) in WBSF tenderness of rib-eye steaks. Percent cooking loss was increased in LG diets (P = 0.017). No differences were observed in consumer sensory analysis of tenderness, juiciness, and flavor intensity (P ≥ 0.276; 5.43 ± 0.12, 5.07 ± 0.13, and 5.17 ± 0.05, respectively). These data suggest that feeding steers diets that differ in energy concentration and result in ADG of 1.4 and 1.7 kg/d during the growing period results in minimal changes in subsequent finishing performance and does not affect meat quality.

Effects of different dietary energy and protein levels and sex on growth performance, carcass characteristics and meat quality of F1 Angus × Chinese Xiangxi yellow cattle

“…The shear force value was not affected by the energy or protein levels or sex with a mean value of 3.14 kg, so can be classified as “very tender” meat. One study has found that the shear force value of meat was 3.62 kg when Angus steers were slaughtered at a younger age of 14 mon with a 14 d post-mortem [38], this value was higher than that found in the present study. A younger slaughter age and longer post-mortem ageing time could produce more tender meat [39,40].…”

Stocker Growth on Rye and Ryegrass Pastures Affects Subsequent Feedlot Gains and Carcass Traits

“…In contrast, Hancock et al (3) reported lower fat thickness, YG, and MARB among low ADG performing animals during the grazing period when fed to a constant weight end point. Loken et al (6) fed two drylot energy rations to create two ADG levels, and concluded that the backgrounding ADG of 1.4 kg/day (low) or 1.7 kg/day (high) did not affect feedlot ADG, and that carcass traits were not affected by these pre‐feedlot ADG. The pasture ADG grouping used in our study represented a wider range of stocker gain during backgrounding.…”

“…3). (6) fed two drylot energy rations to create two ADG levels, and concluded that the backgrounding ADG of 1.4 kg/day (low) or 1.7 kg/day (high) did not affect feedlot ADG, and that carcass traits were not affected by these pre-feedlot ADG. The pasture ADG grouping used in our study represented a wider range of stocker gain during backgrounding.…”

“…Sainz et al (11) restricted the growth of medium‐framed British type steers during the growing phase and observed increased intake and compensatory gains during the subsequent finishing period. Several have assessed various management systems or quality of forages on subsequent gain during the finishing period and effects on carcass traits (3,6,7,9,10). Neel et al (8) wintered stockers in drylot with restricted rations to create three gain categories, and concluded that stocker growth affected finishing performance and carcass quality.…”

Babassu mesocarp bran levels associated with whole or ground corn grains in the finishing of young bulls: carcass and meat characteristics

“…According to Loken et al (2009), approximately 70% of the expenses on feedlot production occur with the purchase of feeds, and approximately two-thirds of these expenses are associated with the concentrate feed. Among these feeds traditionally employed in animal production, corn stands out for the large volume utilized, and its use as whole grain has been an alternative for regions of low production of roughages, aiming at lowering the starch fermentation speed, in addition to reducing the costs related to the concentrate feed due to the lower degree of processing of this ingredient.…”