초록 ▼

IV. 연구개발 결과 및 활용에 대한 건의
1. 에너지 요구량
한우 거세우의 육성, 비육시의 ME 요구량은 제1세부과제에서 얻어진 유지요구량 (MEm)과 증체에 필요한 요구량(MEg)의 합계로 나타내었다
즉, MEg는 본 시험에서 얻어진 NEg를 표준 급여사료내의 에너지 대사율(q)로부터 ARC 표준에 준하여 구한 kf로 나누어 산출하였다.
MEm=0.1136xW^0.75
NEg=0.0533x대사체중(W^0.75)xDG(kg)
q=0.5304+0.0748xDG

IV. 연구개발 결과 및 활용에 대한 건의
1. 에너지 요구량
한우 거세우의 육성, 비육시의 ME 요구량은 제1세부과제에서 얻어진 유지요구량 (MEm)과 증체에 필요한 요구량(MEg)의 합계로 나타내었다
즉, MEg는 본 시험에서 얻어진 NEg를 표준 급여사료내의 에너지 대사율(q)로부터 ARC 표준에 준하여 구한 kf로 나누어 산출하였다.
MEm=0.1136xW^0.75
NEg=0.0533x대사체중(W^0.75)xDG(kg)
q=0.5304+0.0748xDG
kf=0.78xq+0.006
MEg=NEg/KF
ME = MEm + MEg
DE 요구량은 ME 요구량을 대사율(0.82)로 나누어 구하였고, TDN 요구량은 DE 요구량에 4.41을 곱하여 구하였다.
DE = ME/0.82
TDN 1kg = 4.41Mcal DE
2. 단백질 요구량
유지를 위한 정미단백질 요구량(NPm)은 본 시험에서 얻은 구한 CPm 요구량에 변환효율(EP)을 곱하여 구하였다.
CPm=5.56 W^0.75
NPm=CPmx0.51
증체의 단백질축저량(RP)은 한우 거세우 체구성에 대한 연구축산기술연구소 자료를 분석하여 도출한 다음 식중 제한급여 자료만을 이용하였다.
RP=DGx(224.7-0251xW)
따라서 정미 조단백질의 요구량은 다음 식과 같다.
NP=NPm + RP
거세우의 비육시의 MP 요구량은 정미단백질(NP)을 생물가(0.60)로 나누어 구하였다
MP = NP/생물가(0.60)
CP요구량은 NP 요구량을 단백질의 변환효율로 나누어 산출하였다.
CP=NP/0.51
3. 한우거세우의 건물섭취량 예측 및 사료급여 프로그램개발
건물섭취량은 체중의 %로 추정하는 것이 입력항목이 간단하고 대체로 정확한 다음과 같은 공식을 유도할 수 있었다.
DMI(% of BW/d) = 0.034BW(kg) + 3.437 (R² = 0.8657)

Abstract ▼

2. Result of experiments
1) Energy requirements for maintenance
The maintenance energy requirements of Hanwoo steers were measured by calorimetric method. The steers fed three different energy levels (0.8×maintenance, 1.2×maintenance, 1.6×maintenance) at growing, early stage of fattening and l

2. Result of experiments
1) Energy requirements for maintenance
The maintenance energy requirements of Hanwoo steers were measured by calorimetric method. The steers fed three different energy levels (0.8×maintenance, 1.2×maintenance, 1.6×maintenance) at growing, early stage of fattening and late stage of fattening. The steers received 44% of their energy from concentrates and 56% form rice straw and were housed in metabolism stalls during the 5days of collection period, a total collection of feces and urine. Thereafter, during the 2days of respiration period the heat production was measured by indirect calorimetry using respiratory chamber. Mean value of metabolizable energy for maintenance (MEm) was 113.6kcal/$W^{0.75}$
2) Energy requirements for growth
The equation for net energy requirements for growth (NEg) was developed with the data set including slaughter experiments conducted at the NLRI between 1994 and 1997 of approximately 200 steers. The results were as follow: NEg = 0.0533×empty $BW^{0.75}$×daily empty body growth
3) Protein requirements for maintenance
Nitrogen balance studies were carried out for determining the maintenance protein requirement at growing, early stage of fattening and late stage of fattening and nitrogen analysis of feed, feces and urine has had been doing. Mean value of protein requirement for maintenance(CPm) was 5.56kcal/W^0.75
4) Protein requirements for growth
The equation for net energy requirements for growth (NEg, RP) was developed with the data set including slaughter experiments conducted at the NLRI between 1994 and 1997 of approximately 200 steers. The results were as follow:
RP = DGx(224.7-0.251xW)
5) Evaluation of protein availability of feed
Ruminal digestibilities of rape seed meal corn germ meal showed significant differences (63.7% vs. 30.6%), while only 19% higher value was obtained for the rape seed meal in the abomasum. There was no difference of digestibility between the feeds in the duodenum.
6) Estimation of dry matter intake and development of feeding program
The equation for estimationg DM intake was induced as follwoing;
DMI(% OF BW/d)= 0.0034BW(kg)+3.437 (R²=0.8657)