Effect of feeding mirin lees on the growth performance and meat quality in meat-type Nagoya breed chickens
2019
Ohguchi, H. | Miyakawa, H. | Nakamura, K.
Three feeding experiments were conducted to evaluate the effects of feeding mirin lees to meat-type Nagoya breed chickens (NGY) on their performance and meat quality, and to determine an effective feeding method. In experiment 1 (Ex1), NGY were fed one of four experimental diets for 14 weeks. The experimental diets were a control diet (CT) and three test diets consisting of the CT diet with 10%, 20%, and 30% mirin lees. In experiment 2 (Ex2), NGY were fed one of three experimental diets for 11 weeks. The experimental diets were CT and two test diets, which consisted of CT diets sprinkled with mirin lees at 20% and 40% of predicted feed intake. In experiment 3 (Ex3), mirin lees were supplied at 30% of predicted feed intake in another feeder for 11 weeks. The results were as follows: 1. In Ex1, the diet containing 30% mirin lees became solid. No significant differences were observed in growth rates and feed conversion rates of NGY in any of the experiments. However, in Ex2 and Ex3, the growth rates and feed conversion rates in the NGY fed mirin lees tended to be higher than those of control group NGY. The economic benefits of NGY fed mirin lees were higher than those of NGY in control groups in all experiments. 2. In Ex2, no significant difference was observed in fatty acid composition of breast meat from NGY fed the different diets. However, sufficient improvement in sensorial evaluation of breast meat in the groups fed mirin lees was obtained. The results indicate that mirin lees could be utilized as a feed for NGY, and sprinkling commercial chicken feed with mirin lees or providing mirin lees in a separate feeder would be effective.
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