This study was conducted to evaluate the effects of dietary pitamin, pine bark extracts, as a organic livestock feed additives on the egg production and egg quality of laying hens. One hundred-fifty laying hens (Hyline brown) were randomly allocated to one of the following 3 treatment groups for 6 weeks: control, pitamin 0.1% and pitamin 0.2%. The egg production of hens fed the diet containing 0.1% pitamin was similar to that of the control; however, the egg production of the pitamin 0.2% group was significantly lower than that of the other groups (p

Ⅰ. 서론 Ⅱ. 재료 및 방법 Ⅲ. 결과 및 고찰 Ⅳ. 적요 참고문헌

• 홍병주
• 오진석
• 김병완
• 박병성