Effect of Age on Energy Requirement for Maintenance and Growth of Dorper and Hu Crossbred F1 Ewes Weighing 20 to 50 kg
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
This research aimed to define the energy requirement of Dorper and Hu Hybrid F1 ewes 20 to 50 kg of body weight, furthermore to study energy requirement changes with age and evaluate the effect of age on energy requirement parameters. In comparative slaughter trial, thirty animals were divided into three dry matter intake treatments (ad libitum, n = 18; low restricted, n = 6; high restricted, n = 6), and were all slaughtered as baseline, intermediate, and final slaughter groups, to calculate body chemical components and energy retained. In digestibility trial, twelve ewes were housed in individual metabolic cages and randomly assigned to three feeding treatments in accordance with the design of a comparative slaughter trial, to evaluate dietary energetic values at different feed intake levels. The combined data indicated that, with increasing age, the net energy requirement for maintenance (NEm) decreased from 260.62±13.21 to 250.61±11.79 kJ/kg0.75 of shrunk body weight (SBW)/d, and metabolizable energy requirement for maintenance (MEm) decreased from 401.99±20.31 to 371.23±17.47 kJ/kg0.75 of SBW/d. Partial efficiency of ME utilization for maintenance (km, 0.65 vs 0.68) and growth (kg, 0.42 vs 0.41) did not differ (p>0.05) due to age; At the similar condition of average daily gain, net energy requirements for growth (NEg) and metabolizable energy requirements for growth (MEg) for ewes during late fattening period were 23% and 25% greater than corresponding values of ewes during early fattening period. In conclusion, the effect of age upon energy requirement parameters in the present study were similar in tendency with previous recommendations, values of energy requirement for growth (NEg and MEg) for Dorper and Hu crossbred female lambs ranged between the NRC (2007) recommendation for early and later maturating growing sheep.
Abstract
This research aimed to define the energy requirement of Dorper and Hu Hybrid F1 ewes 20 to 50 kg of body weight, furthermore to study energy requirement changes with age and evaluate the effect of age on energy requirement parameters. In comparative slaughter trial, thirty animals were divided into three dry matter intake treatments (ad libitum, n = 18; low restricted, n = 6; high restricted, n = 6), and were all slaughtered as baseline, intermediate, and final slaughter groups, to calculate body chemical components and energy retained. In digestibility trial, twelve ewes were housed in individual metabolic cages and randomly assigned to three feeding treatments in accordance with the design of a comparative slaughter trial, to evaluate dietary energetic values at different feed intake levels. The combined data indicated that, with increasing age, the net energy requirement for maintenance (NEm) decreased from 260.62±13.21 to 250.61±11.79 kJ/kg0.75 of shrunk body weight (SBW)/d, and metabolizable energy requirement for maintenance (MEm) decreased from 401.99±20.31 to 371.23±17.47 kJ/kg0.75 of SBW/d. Partial efficiency of ME utilization for maintenance (km, 0.65 vs 0.68) and growth (kg, 0.42 vs 0.41) did not differ (p>0.05) due to age; At the similar condition of average daily gain, net energy requirements for growth (NEg) and metabolizable energy requirements for growth (MEg) for ewes during late fattening period were 23% and 25% greater than corresponding values of ewes during early fattening period. In conclusion, the effect of age upon energy requirement parameters in the present study were similar in tendency with previous recommendations, values of energy requirement for growth (NEg and MEg) for Dorper and Hu crossbred female lambs ranged between the NRC (2007) recommendation for early and later maturating growing sheep.
참고문헌 (24)
- AFRC., "Energy and Protein Requirements of Ruminants: An Advisory Manual Prepared by the AFRC Technical Committee on Responses to Nutrients" (1993), CAB International
- AOAC., "Official Methods of Analysis" (1990), Association of Official Analytical Chemists Inc
- ARC., "The Nutrient Requirements of Ruminant Livestock" (1980), Commonwealth Agricultural Bureaux
- Blaxter, K. L., "Prediction of the amount of methane produced by ruminants", Br. J. Nutr, 19, pp.511~522 (1965)
- Cannas, A., "A mechanistic model for predicting the nutrient requirements and feed biological values for sheep", J. Anim. Sci, 82, pp.149~169 (2004)
- CSIRO., "Nutrient Requirements of Domesticated Ruminants", Commonwealth Scientific and Industrial Research Organization Publishing, ~ (2007)
- Dawson, L. E. R., "Estimation of maintenance energy requirements of beef cattle and sheep", J. Agric. Sci, 131, pp.477~485 (1998)
- Deng, K. D., "Energy requirements for maintenance and growth of Dorper crossbred ram lambs", Livest. Sci, 150, pp.102~110 (2012)
- Fernandes, M. H. M. R., "Energy and protein requirements for maintenance and growth of Boer crossbred kids", J. Anim. Sci, 85, pp.1014~1023 (2007)
- Freetly, H. C., "Relationship between aging and nutritionally controlled growth rate on heat production of heifers", J. Anim. Sci, 81, pp.1847~1852 (2003)
- Galvani, D. B., "Energy requirements of Texel crossbred lambs", J. Anim. Sci, 86, pp.3480~3490 (2008)
- Garrett, W., "Factors influencing energetic efficiency of beef production", J. Anim. Sci, 51, pp.1434~1440 (1980)
- Shoukun Ji, "Net Phosphorus Requirements of Dorper×Thin-tailed Han Crossbred Ram Lambs", ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES, 26(9), pp.1282~1288 (2013), 아세아·태평양축산학회[DOI]
- Kamalzadeh, A., "Maintenance and growth requirements for energy and nitrogen of Baluchi sheep", Int. J. Agric. Biol (2007)
- NRC., "Nutrient requirements of small ruminants: Sheep, goats, cervids, and new world camelids" (2007), Natl. Acad. Press
- Pires, C. C., "Corporal composition and nutritional requirements for energy and protein of growing lambs", Rev. Bras. Zootec, 29, pp.853~860 (2000)
- Prieto, C., "Protein and energy requirements for maintenance of indigenous Granadina goats", Br. J. Nutr, 63, pp.155~163 (1990)
- Rhind, S., "Seasonality of food intake in ruminants: Recent developments in understanding", Nutr. Res, 15, pp.43~65 (2002)
- Suttie, J. M., "Extreme seasonal growth in arctic deer: comparisons and control mechanisms", Am. Zool, 35, pp.215~221 (1995)
- Seve, B., "Nutrient-hormone signals regulating muscle protein turnover in pigs", Proc. Nutr. Soc, 56, pp.565~580 (1997)
- Silva, A. M. A., "Net requirements of protein and energy for maintenance of wool and hair lambs in a tropical region", Small Rumin. Res, 49, pp.165~171 (2003)
- Tyler, N. J. C., "Seasonal inappetence and weight loss in female reindeer in winter", Ecol. Bull, 47, pp.105~116 (1999)
- Van Soest, P. J., "Methods for dietary fiber, neutral detergent fiber, and nonstarch polysaccharides in relation to animal nutrition", J. Dairy Sci, 74, pp.3583~3597 (1991)
- Xu, G. S., "Study on Energy and Protein Requirements of 20 to 35kg Dorper and thin-tailed Han Crossbred Lambs", 박사, pp.2012