Effect of short-term fattening period and castration method on productivity, serum testosterone, and economic efficacy in Hanwoo cattle.

The purpose of this study was to evaluate the effects of castration method and short-term fattening periods on Hanwoo cattle. Thirty-two Hanwoo calves (average body weight: 148.4 ± 19.8 kg) were used. The calves were randomly assigned in a 2 × 2 factor according to two castration methods (castration or hemi-castration) and two short-term finishing periods (24 months or 26 months). The final body weight increased significantly as the fattening period increased ( p < 0.05), and the average daily weight gain was higher in the hemi-castration groups than in the castration groups ( p < 0.05). After surgical castration, testosterone concentration was higher in the hemi-castration group than in the castration group during the entire experimental period ( p < 0.05). The rib eye area was wider in the hemi-castration group than in the castration group ( p < 0.01).An interaction effect was observed between the castration method and short-term fattening period ( p < 0.05). Marbling and auction price scores differed between castration methods and were higher in the castration group than in the hemi-castration group ( p < 0.01). Gross receipts and net income increased in the castration group compared to the hemi-castration group ( p < 0.01) and showed a tendency to increase with the short-term fattening period, but there was no significant difference. Thus, castration to remove both testicles is essential for economic profit through producing high-quality Korean beef meat, and short-term fattening for 26 months, rather than 24 months, can benefit more by increasing carcass weight and meat quality.