Determination of Maintenance Energy Requirements for Growing Hanwoo Steers

육성기 거세한우의 유지에너지 요구량 결정에 관한 연구

  • Received : 2010.10.15
  • Accepted : 2010.12.03
  • Published : 2011.04.30


Present experiment was carried out to determine maintenance energy requirements for growing Hanwoo steers. Six Hanwoo steers (BW = $180.6{\pm}3.1$ kg) were used in two 3 ${\times}$ 3 latin square design with three different energy intake levels; TDN 1.70 kg (Low), 2.05 kg (Medium), 2.80 kg (High), respectively, based on the Korean Feeding Standards. Each period lasted 18 days including a 14-day adaptation and a 4-day measuring period. The steers were in the head hood chamber system (one cattle per chamber) during each measuring time to measure heat and methane production for 1 day. Dry matter intake was 2,058, 3,256 and 3,881 g/day for Low, Medium and High TDN, respectively. Increase in energy intake did not affect digestibilities of dry matter, crude protein, crude fiber, crude fat, NDF, ADF and nitrogen-free extract. Gross energy intake averaged 180.21, 292.74 and 337.15 kcal/$BW^{0.75}$ for Low, Medium and High TDN, respectively. Energy loss was 28.7% in feces and 2.1% in urine of gross energy intake. Further, energy loss from methane produced during rumen fermentation was 6~8.3%, while body heat loss averaged 34~60%. Intercept of regression equation between ME intake and retained energy indicated that the energy requirement was 109.84 kcal ME/$BW^{0.75}$.


Maintenance energy;Energy balance;Energy requirement;Hanwoo


  1. A. O. A. C. 1990. Official Methods of Analysis. 15th ed. Association of Official Analytical Chemists. Washington, D. C.
  2. Balch, C. C. 1971. Proposal to use time spent for chewing as an index of the extent to which diets for ruminants prossess the physical property of fibrousness characteristics of roughages. Brit. J. Nutr. 26:383-392.
  3. Byers, F. M. 1982. Patterns and energetic efficiency of tissue growth in beef cattle of four brceds. In energy metabolism of farm animals (ed A. ekern and F. Sundstol), pp. 92-95. Agricultural University of Norway, Aas-NLH.
  4. Carstens, G. P., Johnson, D. E., Johnson, K. A., Hotovy, S. K. and Szymanski, T. J. 1989. Genetic variation in energy expenditures of monozygous twin beef cattle at 9 and 20 months of age. Energy Metab. Proc. Symp. 43:312-315.
  5. Chung, Y. H., Lee, S. C., Kang, S. W., Chung, C. S. and Chung, C.Y. 1992. Estimation of energy and protein requirements for Korean Native Heifers. I. Estimation of energy and protein requirements for Korean native heifer by metabolism trail. Korean. J. Anim. Sci. 34:293-300.
  6. Derno, M., Jentsch, W., Schweigel, M., Kuhla, S., Metges, C. C. and Matthes, H. D. 2005. Measurements of heat production for estimation of maintenance energy requirements of Hereford steers. J. Anim. Sci. 32:451-456.
  7. Duncan, D. B. 1955. Multiple range and multi F test. Biometrics. 11:1-42.
  8. Feng, Y., Kim, W. Y., Kim, H. D., Kim, J. K. and Han In K. 1999. Studies on energy utilization of low-quality roughages in fattening holstein steers. Kor. J. Anim. Nutr. Feed. 23(5):401-410.
  9. Garrett, W. N. 1971. Energy efficiency of beef and dairy steers. J. Anim. Sci. 69:2168-2176.
  10. Kim, K. H., Oh, Y. G., Kim, W., Lee, S. C., Shin, K. J. and Jeon, B.T. 2004. Determination of energy requirement for maintenance in Hanwoo steers. J. Anim. Sci & Technol. (kor) 46(2):193-200.
  11. Laurenz, J. C., Byers, F. M., Schelling, G. T. and Greene, L. W. 1991. Effects of season on the maintenance requirements of mature beef cows. J. Anim. Sci. 69:2168-2176.
  12. Lee, S. C., Thak, T. Y., Kim, K. H. and Yoon, S. G. 2003.Metabolizable energy requirement of growing Hanwoo bulls for maintenance by energy equilibrium method. J. Anim. Sci. & Technol. (kor). 45:123-130.
  13. Lofgreen, J. P. and Garrett, W. N. 1968. A system for expressing net energy requirements and feed values for growing and finishing beef cattle. J. Anim. Sci., 27:793-806.
  14. National Institute of Animal Science, RDA. 2007. Korean Feeding Standard for Hanwoo.
  15. NRC. 1984. Nutrient Requirements of Domestic Animals. No. 4. Nutrient Requirements of Beef Cattle. Sixth Revised Ed. National Academy of Sciences-National Research Council. Washington, DC.
  16. NRC. 2000. Nutrient Requirements of Domestic Animals. No. 4. Nutrient Requirements of Beef Cattle. Sixth Revised Ed. National Academy of Sciences-National Research Council. Washington, DC.
  17. Orskov. E. R., Fracer, C. and Kay, R. N. B. 1969. Dietary factors influencing digestion of starch in the rumen and small and large intestine of early weaned lambs. Brit. J. Nutr. 23:2217-226.
  18. Osuji, P. O., Gordon, J. G. and Webster, A, J. F. 1975. Energy exchanges associated with eating and ruminantion in sheep given grass diets of different physical forms. Brit. J. Nutr. 34:59-71.
  19. SAS. 2002. SAS User’s Guide: Statistics, Version 9.1 Edition. SAS Inst., Inc., Cary, NC.
  20. Solis, J. C., Byers, F. M., Schelling, G. T., Long, C. R. and Green, L. W. 1988. Maintenance requirements and energetic efficiency of cows of dififerent breed. J. Anim. Sci. 66:764-773.
  21. Taylor, C. S., Turner, H. G. and Young, G. B. 1981. Genetic control of equilibrium maintenance effciency in cattle. Anim. Prod. 33:179-194.
  22. Thak, T. Y., Kang, T. H. and Kim, K. S. 1983. Studies on maintenance requirements of energy and protein for korean native cows by metabolism trials. Korean. J. Anim. Sci. 25(2):117-137.
  23. Vermorel, M., Bouvier, J. C. and Geay, Y. 1980. Energy utilization by growing calves: Effects of age, milk intake and feed level. Energy Metab. Proc. Symp 26:9-53.