Abstract

This study was carried out investigate the effects of the period of dietary supplementation and the level of fermented mineral feed on daily body weight gain and carcass characteristics of Hanwoo steer. The dietary treatments were compared during two supplementation periods (T1:Feeding Hanwoo steers from 18 months to 25 months, T2: feeding Hanwoo steers from 7 months to 25 months), and the diets tested were of four types (0%: normal concentrate as a basal diet, 1%: 1% addition of fermented mineral feed, 2%: 2% addition of fermented mineral feed, and 3%: 3% addition of fermented mineral feed). A Total of 35 Hanwoo steers were allocated into 7 feeding groups. The daily gain of the 0% fermented mineral feed group was lower (0.64 kg) than that of the other groups (1%: 1.08 kg, 2%: 0.90 kg, 3% treatment: 0.75 kg) for the T1 period, and for the T2 period the order was 1% (0.98 kg) > 0% (0.75 kg) > 1% (0.89 kg). The amount of back fat in decreasing order was as follows: 0% (12.0) > 1% (10.8) > 2% (10.2) > 3% fermented mineral feed (7.8 mm) for the T1 period, and for the T2 period the order was C (16 mm) > T1 (13.8 mm) > T3 treatment (12.6 mm). Eye muscle area increased with increased fermented mineral feed levels. The marbling score of the T1 groups was highest with 3% fermented mineral feed (4.2), and of the T2 groups, the highest score was seen with 1% fermented mineral feed (5.6). Meat color and meat maturity were not different among all groups. The grade of meat quantity and meat quality of both the T1 and T2 groups were highest with the addition of 3% fermented mineral feed. The daily income ranged from 2,062 won to 5,265 won in the T1 groups, which were ordered as follows: 1% > 2% > 3% > 0% fermented mineral feed, and of the T2 groups, the 1% group was highest at 6,098 Won, while the 3% group was lowest at 4,590 Won.

본 연구는 발효무기물 사료 급여기간 및 급여수준이 한우거세우의 일당증체량, 육량, 육질 및 경제성에 미치는 영향을 검토하고자 급여기간을 두구(T1: 비육후기 7개월 동안 급여, T2: 육성기에서 비육후기까지 18개월 급여)로 하고, 급여수준(농후사료 기준으로 0%, 1%, 2%, 3% 첨가)을 세구 로 하여 총 7처리로 실시하였다. 본 시험에서 얻어진 주요한 결과를 하면 다음과 같다. T1에 있어서 일당증체량은 1%구(1.08 kg) > 2%구(0.90 kg) > 3%구(0.75 kg) > 0%구(0.64 kg) 첨가 순으로 나타났으며, T2에서는 1%구(0.98 kg) > 0%구(0.91 kg) > 3%구(0.89 kg) 순으로 나타났다. 등지방 두께는 T1 및 T2 모두 발효 무기물 사료 첨가량이 높을수록 등지방 두께는 얇아져 육량등급에 매우 유리한 것으로 나타났다. 배장근 단면적은 무처리구(0%)에 비하여 처리구(1%, 2% 및 3%)가 모두 높게 나타났으며, 육질등급에 가장 중요한 근내지방도는 T1에 있어서는 3% 첨가구(4.2)가 T2에 있어서는 1% 첨가구(5.6)가 가장 높게 나타났다. 지방색 및 성숙도에 있어서는 처리구와 무처리구 간에 뚜렷한 경향치를 보이지 않았다. 육량과 육질에 있어서 T1은 3% 처리구가 가장 좋았던 반면 T2에 있어서는 1% 처리구가 가장 좋게 나타났다. 경제성에 있어서는 1% 첨가구가 T1 및 T2에서 가장 높게 나타났다. 이상 결과를 종합해 볼 때, 발효 무기물 사료 1%첨가 급여는 한우 성장 및 육량, 육질을 개선을 함으로써 경제성이 높은 것으로 나타났다.

Keywords

• Hanwoo steer;
• carcass characteristics;
• growth characteristics;
• fermented mineral feed;
• profitability