CAJ | 학술논문

本文旨在研究荷斯坦犊牛日粮蛋白质消化模式的转变、转化效率和代谢特点。选用3头2日龄的荷斯坦公犊进行消化试验和氮平衡试验。试验结果表明，在犊牛1~6月龄期间氮的消化率平均为70.39±6.86，氮的生物学价值平均为51.31±6.04，氮的总利用率平均为36.48±7.24。犊牛日沉积氮量20.80g，每千克增重需氮量44.26g，或日沉积蛋白质130g，每千克增重需蛋白质量279.94g，小于成年牛的需求。
본문지재연구하사탄독우일량단백질소화모식적전변、전화효솔화대사특점。선용3두2일령적하사탄공독진행소화시험화담평형시험。시험결과표명，재독우1~6월령기간담적소화솔평균위70.39±6.86，담적생물학개치평균위51.31±6.04，담적총이용솔평균위36.48±7.24。독우일침적담량20.80g，매천극증중수담량44.26g，혹일침적단백질130g，매천극증중수단백질량279.94g，소우성년우적수구。
The objective of this study was to study diet protein metabolism of Holstein calves. Three 2-day-old Holstein calves were assigned at a digestion-metabolism experiment. The results showed that average apparent digestibility of Nitrogen was 70.39±6.86, the PBV was 51.31±6.04, the average net Nitrogen utilization was 36.48±7.24. The net protein for the gain was 279.94 g/kg. The results indicated that net protein for gain of calves was lower than that of mature cows.