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사료의 단백질 및 에너지 수준이 New Hampshire 웅추의 성장율 , 사료효율과 에너지 대사율에 미치는 영향
정근기 ( K K Jung ),안병홍 ( B H Ahn ),박상문 ( S M Park ),한인규 ( Han I K ),유한웅 ( H W Yu ) 한국축산학회 1970 한국축산학회지 Vol.12 No.1
This experiment was carried out to study the effect of the level of dietary protein and energy on the growth rate, feed efficiency and energy metabolizability of 270 New Hampslaire male chicks for 8 weeks. The results obtained are summarized as follows; 1. The chicks fed 23% of dietary protein and 1,300 ㎉ of energy per pound in the starter ration obtained the best result (p$lt;0.01) in the body weight gain. 2. The amount of diet consumed by the chicks fed 23% level of protein and 1,200 ㎉ of energy per pound was higher than other groups of chicken. However, feed efficiency was significantly (p$lt;0.01) improved by the chicks fed high protein-high energy ration. 3. Protein utilization, nitrogen retention and metabolizable energy value has been significantly (P$lt;0.01) improved by the chicks fed the lowest dietary protein level (17%) with the highest energy level (1,400 ㎉/lb) 4. Feed cost required per ㎏ gain of chicks was cheapest when the dietary level of protein and energy was 23%-1,200 ㎉.