EFFECT OF COMPENSATORY GROWTH AND FATTENING DURATION ON COMPOSITION OF CARCASS COMPONENT OF AUSTRALIAN COMMERCIAL CROSS CATTLE

Abstract

The objective of the experiment was to investigate the effect of compensatory growthand fattening duration on the composition of meat, bone, and fat of carcass from Australian Commercial Cross (ACC) cattle. Eighteen heads of young castrated of 2-3 years old and male ACC cattle were used in this experiment. They body weight of approximately 320 to 360 kg and were divided into 2 treatments. Treatment I was compensatory growth cattle (C), and Non Compensatory growth cattle (NC). Treatment ll was fattening duration of 2, 3, and 4 months (FF-2, Fl“-3 and Ff-4), respectively. The feeding given amounting of 2.4% to 2.7% of body-
weight (based on dry-matter) with concentrate was 90% and King grass was l0%. The ration was composed by 12% crude protein, 2392 cal Metabolizable Energy (ME/kg DM). The results showed that the average of daily-gains (ADG), slaughtered weight and carcass weight for compensatory (C) cattle was higher compared to the Non Compensatory (NC) (P<.05). Feed conversion (gain/feed ratio) for C was higher compared to the NC (P<.05). Percentage of carcass and percentage of fat for C were higher compared to NC (P<.05), but percentage of
bone for C was lower compared to the NC (P<.05). Carcass weight, dressing percentage, and fat percentage increased (P<.05) for Fl"-2, Fl"-3 and FT-4, respectively. On the contrary, percentage of meat and percentage of bone fiom carcass decreased (P<.05). It was concluded that efficiency of feedlot could be applied by implementation of compensatory growth phenomena and by manipulation of fattening duration.