Evaluation of forage-based weaning systems in spring-born cross-bred beef calves

Autor:	Phillip Irvin Osborne, Robert A. Dailey, James Yeager Pritchard, Ronnie Helmondollar, John F. Odhiambo
Rok vydání:	2013
Předmět:	Veterinary medicine Animal science Early weaning medicine Economic feasibility Weaning Forage Beef cattle medicine.symptom Biology Weight gain Legume Cattle feeding
Zdroj:	Open Journal of Animal Sciences. :99-104
ISSN:	2161-7627 2161-7597
DOI:	10.4236/ojas.2013.32015
Popis:	Preconditioned calves have greater marketvalue per unit weight than normal-weaned calves. Development of a low cost forage-based preconditioning system allows producers to add value to their calf-crop. This study evaluated calf performance in three forage-based weaning systems; early-weaned calves were backgrounded in legume/grass forage plots and supplemented with commercial preconditioning feed (Treatment 1) or an on-farm corn-mix (Treatment 2). Control (Treatment 3) calves suckled for an additional 45 days. Supplements provided2.17 kgTDN/calf/ day. Weights were collected on days -30, 0 and 45 with respect to early weaning, from135 inyear 1 and 150 calves in each of the two subsequent years. Effects of treatment, age of dam, sex of calf and their interactions on calf weight gain were analyzed by analysis of covariance using GLM procedures of SAS. Marginal effects of treatment and feed cost were used to evaluate economic feasibility. Sensitivity analyses were evaluated for anticipated market fluctuations in feed costs and calf premiums. Data are reported as least squares means. Calf weight gains differed (P 51.5 kg, respectively). Steers calves gained more (P
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5ffecf2d6b4e9edf99df057775595093 https://doi.org/10.4236/ojas.2013.32015 Zobrazit plný text záznamu