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NTIS 바로가기한국초지조사료학회지 = Journal of the Korean Society of Grassland and Forage Science, v.36 no.2, 2016년, pp.115 - 123
김겸헌 (건국대학교 동물자원과학과) , 황원욱 (건국대학교 동물자원과학과) , 김현진 (서울대학교 농업생명과학연구원) , 김수기 (건국대학교 동물자원과학과)
In this study, the effect of energy and protein ratio on the nutrient availability and body weight gain was determined to find the proper nutrient level for the stage of replacement dairy heifers before fertilization at approximately 12~24 months old after birth. Dry matter intake showed that the TD...
핵심어 | 질문 | 논문에서 추출한 답변 |
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송아지가 번식 가능하게 되는 시기는 무엇의 영향을 받는가? | 송아지가 번식 가능하게 되는 시기는 첫 발정 전 발육속도에 따라 다른데 고영양 급여로 성장이 빠르면 성 성숙도 빨리와 첫 발정이 빨라지고, 반대로 저영양 급여로 인한 늦은 발육은 첫 발정도 늦어진다(Barton et al., 1996; DeLa Sota et al. | |
육성우의 초산월령을 앞당기기 위해서는 어떻게 해야되는가? | 1개월령으로 낙농 선진국에서 권장하는 24개월령에 미치지 못하고 있는 실정이다. 초산 분만월령을 앞당기기 위해서는 육성 시기에 종부 가능한 체격까지 발육을 촉진시켜 종부 기간을 단축할 필요가 있고, 고열량 사료를 육성우에 급여함으로써 발육을 촉진시켜 분만사고 없이 초산 분만월령을 조기화 할 수 있다(ARC,1980; Collier et al., 1982; Gardner, 1977; Jeong, 2013). | |
송아지에게 극단적인 고영양이 미치는 영향은? | , 1993). 그러나 송아지에게 고영양 사료를 급여함으로서 초산 종부시기를 빠르게 하는 것은 가능하지만, 극단적인 고영양은 젖소의 유선조직 발달을 억제하여 유생산성이 평균보다도 저하되는 것으로 알려져 있다(Drackley, 2004; Moon et al, 2002; Son, 2012). Choi(2004)의 연구결과에 따르면 사료 단백질의 과잉 공급이 번식능력을 저하시키는 데 그 이유는 과잉의 질소를 배출할 때 소요되는 에너지와 관련이 있으며, 비유 초기에 유생산에 필요한 에너지가 체조직으로부터 배출될 때 과잉의 질소배출로 인해 추가적인 에너지가 손실되기 때문이라고 보고하였다. |
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