Open AccessFattening performance and carcass traits of implanted and supplemented grassfed bulls
Author(s) -
Nelson Huerta-Leidenz,
Nancy Jerez-Timaure,
Susmira Godoy,
Carlos Rodríguez-Matos,
Omar Araujo-Febres
Publication year - 2021
Publication title -
revista científica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.126
H-Index - 12
eISSN - 2521-9715
pISSN - 0798-2259
DOI - 10.52973/rcfcv-luz312.art2
Subject(s) - zoology , implant , regimen , breed , grazing , carcass weight , biology , medicine , surgery , body weight , endocrinology , agronomy
Ninety-nine uncastrated males were randomly distributed into four grazing groups to examine variation in growth and carcass traits, due to the implant regime [Implantation of 72 miligrams (mg) of Ralgro® at day (d) 0 followed by its reimplantation at d 90 versus implantation of Revalor® at d 0 followed by 72 mg of Ralgro® at d 90)], and suplementation type [mineral supplementation (MS) versus strategic supplementation (SS)]. With a 2 x 2 factorial arrangement, the analysis of variance included the treatments and their interaction (implant regimen x supplementation) as fixed effects, and the breed type as a random effect. The interaction was not significant; neither did the implant regimen on any growth trait (P > 0.05). Compared to MS, the SS group had a greater daily weight gain (779 vs. 541 grams; P 0.05). The use of aggressive implant regimens to improve growth or carcass characteristics of grazing bulls is not justified. SS is a feasible practice to improve fattening performance of grazing bulls but no beneficial impact on their carcass quality was expected.