Browse > Article
http://dx.doi.org/10.5187/JAST.2007.49.2.239

Effects of Weaning Age on Growth Performance, Feed Intake, Disease Occurrence of Hanwoo Calves and Reproductive Efficiency of Dams  

Kwon, E.G. (National Livestock Research Institute, R.D.A.)
Park, B.K. (National Livestock Research Institute, R.D.A.)
Cho, Y.M. (National Livestock Research Institute, R.D.A.)
Han, M.H. (National Livestock Research Institute, R.D.A.)
Choi, C.Y. (National Livestock Research Institute, R.D.A.)
Lee, M.S. (National Livestock Research Institute, R.D.A.)
Publication Information
Journal of Animal Science and Technology / v.49, no.2, 2007 , pp. 239-244 More about this Journal
Abstract
This study was conducted to investigate effects of weaning age on growth perforance, feed intake, disease occurrence and maternal reproductive efficiency in Hanwoo. Sixty experimental calves were allocated into two groups, early weaned (n=29, calf age 90 d, EW) and normally weaned (n=31, calf age 120 d, NW). Body weights and average daily gains during nursing and post-weaning periods were similar between two groups (p>0.05). Weaning age had no effect on calf starter, grass hay, dry matter, crude protein and TDN intakes of calves (p>0.05). Maternal calving interval in EW was shortened by 23 days compared to NW (p>0.05). Any difference in occurrence of disease was not observed between groups. Present results indicate that early weaning age has no negative effects on growth performance, feed intake or on disease occurrence in Hanwoo calves. And it has positive influence on maternal calving interval.
Keywords
Weaning age; Growth performance; Feed intake; Maternal reproductive efficiency; Hanwoo calf;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 AOAC. 1995. Official Methods of Analysis. 16th Ed. Association of Official Analytical Chemist, Washington D. C., U. S. A
2 Arthington, J. D., Spears, J. W. and Miller, D. C. 2005. The effect of early weaning on feedlot performance and measures of stress in beef calves. J. Anim. Sci. 83:933-939
3 Green, W. W. and Buric, J. 1953. Comparative performance of beef calves weaned at 90 and 180 days of age. J. Anim. Sci. 12:561-572   DOI
4 Hoffman, D. P., Stevenson, J. S. and Minton, J. E. 1996. Restricting calf presence without suckling compared with weaning prolongs postpartum anovulation in beef cattle. J. Anim. Sci. 74:190- 198   DOI
5 Jain, N. C. 1986. Cattle : Normal hematology with comments on response to disease. In : Schalm's veterinary hematology. 4th. 2d, Lea ＆ Febiger. pp. 178-207
6 Lusby, K. S., Wettemann, R. P. and Turman, E. J. 1981. Effects of early weaning calves from first-calf heifers on calf and heifer performance. J. Anim. Sci. 53:1193-1197   DOI
7 Short, R. E., Bellows, R. A., Moody, E. L. and Howland, B. E. 1972. Effects of suckling and ma- stectomy on bovine postpartum reproduction. J. Anim. Sci. 34:70-74   DOI
8 김두, 유영수, 유한상, 윤충근. 1990. 한우 송아지의 포유기간 중의 설사발생에 관한 연구. 대한수의학회지. 30:255-260
9 서국현, 이동원, 허태영, 류일선, 손동수, 정영훈, 최창용, 김일화. 2001. 송아지 수동면역 결핍과 질병발생에 관한 요인 연구. 축산시험연구보고서. pp. 406-433
10 Myers, S. E., Faulkner, D. B., Ireland, F. A. and Parrett, D. F. 1999. Comparison of three weaning ages on cow-calf performance and steer carcass traits. J. Anim. Sci. 77:323-329
11 Peterson, G. A., Turner, T. B., Irvin, K. M., Davis, M. E., Newland, H. W. and Harvey, W. R. 1987. Cow and calf performance and economic considerations of early weaning of fall-born beef calves. J. Anim. Sci. 64:15-22   DOI
12 SAS. 1999. SAS/STAT Software for PC. Release 6.11, SAS Institute, Cary, NC, U. S. A
13 강수원, 임석기, 정종원, 우제석, 전기준. 2003. 농후사료 급여수준 및 방목이 춘계분만 한우 암송아지의 성장발육, 번식능력 및 사료이용성에 미치는 효과. 한국동물자원과학회지. 45:101-112
14 안병석, 김영근, 한학석, 박태진. 1991. 한우 송아지의 성장에 미치는 종모우군의 효과. 한국축산학회지. 33:646-650
15 이현범, 권오덕, 강정부, 윤종삼. 가축질병학(총론. 우병학). 1995. 유한문화사. pp. 83-95
16 Story, C. E., Rasby, R. J., Clark, R. T. and Milton, C. T. 2000. Age of calf at weaning of spring-calving beef cows and the effect on cow and calf performance and production economics. J. Anim. Sci. 78:1403-1413
17 Whitter, J. 1995. Time of weaning and cow condition. In: Proc., The Range Beef Cow Symposium X IV, Gering, NE. pp. 92-104
18 Williams, G. L., McVey, W. R. Jr. and Hunter, J. F. 1993. Mammary somatosensory pathways are not required for suckling-mediated inhibition of luteinizing hormone secretion and delay of ovulation in cows. Biol. Reprod. 49:1328-1337   DOI   ScienceOn
19 권오덕, 최경성, 이승옥, 정환, 이주목. 2000. 한우 신생송아지의 질병발생에 관한 조사연구. 한국임상수의학회지. 17:93-101
20 Jung, J. K. 1983. Effects of calving date, cow age and suckling on the interval from calving to conception in beef cows. Kor. J. Anim. Sci. 25:470-475
21 Makarechian, M., Kubisch, H. M. and Price, M. A. 1988. Effects of date of weaning on subsequent performance of beef cows and their female calves. Can. J. Anim. Sci. 68:1035-1040   DOI
22 Martin, S. W. and Wiggins, A. D. 1973. A model of the economic costs of dairy calf mortality. Am. J. Vet. 34:1027-1031
23 Adams, E. C., Clark, R. T., Coady, S. A., Lamb, J. B. and Nielsen, M. K. 1994. Extended grazing systems for improving economic returns from Nebraska sandhills cow / calf operations. J. Range Manage. 47:258-263   DOI