Zobrazeno 1 - 10
of 27
pro vyhledávání: '"P. J. Defoor"'
Autor:
S. T. James, F. L. S. Marquess, M. J. Engler, Paul J. Kononoff, R. S. Swingle, J. F. Gleghorn, P. J. Defoor
Publikováno v:
Journal of Animal Science. 95:194-200
A total of 2,948 steers (mean initial BW = 568.9 ± 49.4 kg) were used to evaluate the effect of the LEP R25C SNP genotype on feed intake, growth performance, and carcass characteristics over time. Steers were grouped into 5 blocks, each consisting o
Publikováno v:
The Professional Animal Scientist. 32:455-460
Two approved ractopamine hydrochloride source options currently exist in the United States cattle feeding marketplace. A study was conducted to evaluate the effects of feeding Actogain (Zoetis Inc., Florham Park, NJ) relative to Optaflexx (Elanco Ani
Autor:
C. A. Gasch, L. J. Walter, Ty E Lawrence, T. J. McEvers, F. L. S. Marquess, John P Hutcheson, P. J. Defoor
Publikováno v:
Journal of Animal Science. 92:325-331
Beef cattle from 3 independent studies conducted in the Texas Panhandle (Exp. 1: n = 3,906 and Exp. 2: n = 4,000) and southern Idaho (Exp. 3; n = 542) were used to investigate the association of pro-melanin concentrating hormone (PMCH) genotype with
Publikováno v:
Journal of Animal Science. 92:332-338
The focus of this investigation was to identify interactions that may exist among alleles of the leptin gene and supplementation of zilpaterol hydrochloride (ZH). Steers (n = 4,246; initial BW = 389.8 ± 8.8 kg) were genotyped and sorted into 1 of 3
Publikováno v:
Journal of Animal Science. 89:1865-1872
Predicting performance is vital to management and marketing decisions in commercial feedlots. Agreement between performance predicted from NE equations or empirical regression relationships and actual performance is generally very good, suggesting th
Publikováno v:
Journal of Animal Science. 88:3009-3017
Intake prediction equations were devel- oped from a commercial feedlot database consisting of 3,363 pen means collected from 3 feedlots over a 4-yr period. The objective was to predict feeding-period av- erage DMI from variables known at the start of
Publikováno v:
Journal of Animal Science. 87:1138-1146
Intake prediction equations of NRC based on initial BW and dietary NE(m) concentration were evaluated with a commercial feedlot database consisting of 3,363 pen means collected from 3 feedlots over a 4-yr period. The DMI predicted by NRC equations ha
Autor:
G. B. Salyer, P. J. Defoor, M. L. Galyean, J. T. Vasconcelos, R. S. Swingle, C. H. Parsons, G. A. Nunnery
Publikováno v:
Journal of Animal Science. 85:3079-3089
Two experiments were conducted to evaluate the effects of feeding different levels of wet corn gluten feed (WCGF) and dietary roughage on performance, carcass characteristics, and feeding behavior of feedlot cattle fed diets based on steam-flaked cor
Autor:
P. J. Defoor, Michael L. Galyean, C. H. Parsons, G. B. Salyer, J. T. Vasconcelos, F. R. Valdez, G. A. Nunnery
Publikováno v:
Journal of Animal Science. 85:2304-2313
Two experiments were conducted to evaluate receiving-period performance, morbidity, and humoral immune response, as well as finishing performance and carcass characteristics of heifers fed different sources of supplemental Zn. In Exp. 1, 97 crossbred
Publikováno v:
Journal of Animal Science. 84:3421-3432
As cattle mature, the dietary protein requirement, as a percentage of the diet, decreases. Thus, decreasing the dietary CP concentration during the latter part of the finishing period might decrease feed costs and N losses to the environment. Three h