Paper ID: 19
EVALUATION OF DIETARY BETA-AGONIST ON PRODUCTION PERFORMANCE AND CARCASS OF BEEF CATTLE: A META-ANALYSIS
Muhammad Ridla, Erika B. Laconi, Nahrowi, Anuraga Jayanegara*
Department of Nutrition and Feed Technology, Faculty of Animal Science, IPB University, Bogor 16680, Indonesia
Beta-agonist has been used in feedlot in order to improve production performance of beef cattle. Despite its common use, to date there is lack of study to quantitatively summarize the effect of beta-agonist across different studies. This study therefore aimed to evaluate the use of beta-agonist on beef cattle by integrating data from various experiments and analyzing the data by a meta-analysis method. A total of 42 articles were used to build a database in which the articles reported dietary addition of beta-agonist on performance and carcass of beef cattle. Treatments were grouped into control (without beta-agonist) and with beta-agonist addition. The treatments were considered as fixed effects whereas different experiments were considered as random effects. Model statistics used was P-value in order to distinguish between the two groups, and the P-value less than 0.05 was considered to be significant. Results showed that dietary beta-agonist addition increased average daily gain and gain to feed ratio of beef cattle (P<0.05). Beta-agonist elevated hot carcass weight and carcass percentage (P<0.05), but had no effect on fat thickness. Longissimus muscle area increased (P<0.05) while marbling score decreased (P<0.05) due to the addition of beta-agonist. The additive positively influenced Warner-Bratzler shear force of carcass (P<0.05) but had no effect on its pH value. In conclusion, beta-agonist favorably affects production performance and carcass property of beef cattle.