An evaluation of two grassland-based systems of mid-season prime lamb production using prolific ewes of two genotypes

Irish Journal of Agricultural and Food Research

Volumn 48, Issue 1, 2009, Pages 87-101

  Keady, T W J ^a   Hanrahan, J P ^a   Flanagan, S ^a  

^a TEAGASC   (Ireland)

Author keywords

Indoor lambing; Lamb production; Outdoor lambing; Year round grazing

Indexed keywords

ANIMALIA; OVIS ARIES;

EID: 68349159674     PISSN: 07916833     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (33)

1. Alexander, G. and Williams, D. 1971. Heat stress and development of the conceptus in domestic sheep. Journal of Agriculture Science 76: 53-72.
2. Bell, A.W., Kennaugh, J.M., Battaglia, F.C. and Meschia, G. 1989. Uptake of amino acids and ammonia at mid-gestation by the foetal lamb. Quarterly Journal of Experimental Physiology 74: 635-643.
3. Black, W.J.M. 1975. Winter grazing of pasture by sheep. 1. Some effects of sheep stocking density on permanent pasture, including sward recovery, botanical composition and animal performance assessments. Irish Journal of Agricultural Research 14: 275-284.
4. Binnie, R.C., Mayne, C.S. and Laidlaw, A.S. 2001. The effects of rate and timing of application of fertiliser nitrogen in late summer on herbage mass and chemical composition of perennial ryegrass swards over the winter period in Northern Ireland. Grass and Forage Science 56: 46-56.
5. Carson, A.F., Dawson, L.E.R., Irwin, D. and Kilpatrick, D.J. 2004. The effect of management systems at lambing and flock genetics on lamb output and labour requirements on lowland sheep farms. Animal Science 78: 439-450.
6. Carson, A.F., McClinton, L.W. and Steen, R.W.J. 1999. Effects of Texel or Rouge de l'Ouest genes in lowland ewes and rams on ewe prolificacy, lamb viability and weaned lamb output. Animal Science 68: 69-78.
7. Dulphy, J.P. and Dermarquilly, C. 1972. Effect of chopping fineness of grass silage on the feeding behaviour of sheep. Annales de Zootechnie 21: 443-449.
8. Fitzgerald, J.J. 1996. Grass silage as a basic feed for store lambs 2. Effect of harvesting system and chop length of grass silage on silage intake and performance of store lambs. Grass and Forage Science 51: 378-388.
9. Flanagan, S. 2003. Extended grazing by sheep as a substitute for silage and housing. Proceedings of the Agricultural Research Forum, Tullamore, Ireland, page 79.
10. Grennan, E.J. 1993. Grazing management for sheep. Irish Grassland and Animal Production Association Journal 27: 101-107.
11. Hanrahan, J.P. 1989. Evaluation of crossbred ewe types. Farm and Food Research 20: 28-30.
12. Hanrahan, J.P. 1990. The relationship between ewe body weight, condition score and reproductive performance. Research Note number 6/90 for Teagasc Advisers, Teagasc, Carlow, Ireland.
13. Hanrahan, J.P. 1994. Evaluation of crossbred ewe types: ovulation rate and prolificacy. Proceedings of the Agricultural Research Forum, Tullamore, Ireland, pages 21-22.
14. Hanrahan, J.P. 2007. Association between ewe breed type and longevity in a lowland production system. Proceedings of the Agricultural Research Forum, Tullamore, Ireland, page 72.
15. Hanrahan, J.P. 1997. Belclare breed. 1997 Belclare Research Centre Research Report, Teagasc, Carlow, Ireland, page 23.
16. Keady, T.W.J. 1991. Studies of the mode of action of a bacterial inoculant as a silage additive and an evaluation of its efficacy. PhD Thesis, Queen's University, Belfast, Northern Ireland.
17. Keady, T.W.J. and Hanrahan, J.P. 2006. Efficient sheep production in a subsidy free environment - Research from Athenry. Irish Grassland and Animal Production Association Journal 40: 15-27.
18. Keady, T.W.J. and Hanrahan, J.P. 2007a. The effects of herbage allocation and concentrate supplementation on the performance of replacement ewe lambs offered extended grazed pastures. Proceedings of the British Society of Animal Science, page 140.
19. Keady, T.W.J. and Hanrahan, J.P. 2007b. An evaluation of grass allocation management to single and twin bearing ewes in late pregnancy on ewe and subsequent lamb performance. Proceedings of the Agricultural Research Forum, Tullamore, Ireland, page 107.
20. Keady, T.W.J. and Hanrahan, J.P. 2009a. Effect of shearing at housing, grass silage feed value and extended grazing herbage allowance on ewe and subsequent lamb performance. Animal 3: 141-151.
21. Keady, T.W.J. and Hanrahan, J.P. 2009b. The effects of herbage allowance and frequency of allocation, and silage feed value, when offered to ewes in mid gestation on ewe and lamb performance and subsequent herbage yield. Animal 3: 879-890.
22. Keady, T.W.J., Hanrahan, J.P. and Flanagan, S. 2007. The effects of extended grazing during mid, late and throughout pregnancy, and winter shearing indoors, on ewe performance and subsequent lamb growth rate. Irish Journal of Agricultural Research 46: 169-180.
23. th International Silage Conference, Auchincruive, Scotland, pages 322-323.
24. th Annual Report of the Agricultural Research Institute of Northern Ireland, pages 40-55.
25. Keady, T.W.J. and Murphy, J.J. 1998. The effects of ensiling and supplementation with sucrose and fishmeal on forage intake and milk production of lactating dairy cows. Animal Science 66: 9-20.
26. Keady, T.W.J. and O'Kiely, P. 1996. An evaluation of the effects of rate of nitrogen fertilization of grassland on silage fermentation, in-silo losses, effluent production and aerobic stability. Grass and Forage Science 51: 350-362.
27. Nolan, T. 1972. Fat lamb production in the West of Ireland. 2. Effects of three stocking rates on lamb growth rate and on production of lamb carcass meat and wool per hectare. Irish Journal of Agricultural Research 11: 47-62.
28. Nolan, T. and Black, W.J.M. 1970. Effect of stocking rate on tooth wear in ewes. Irish Journal of Agricultural Research 9: 187-196.
29. O'Riordan, E.G. 1995. Effect of regrowth interval in the autumn on growth of grass in the autumn/winter period. Proceedings of the Agricultural Research Forum, Tullamore, Ireland, pages 181-182.
30. Russel, A.J.F., Doney, J.M. and Gunn, R.G. 1969. Subjective assessment of body fat in live sheep. Journal of Agricultural Science, Cambridge 72: 451-454.
31. SAS. 2000. Version 8.0. SAS Institute Inc., Cary, NC, USA.
32. Shelton, M. and Huston, J.E. 1968. Effects of high temperature stress during gestation on certain aspects of reproduction in the ewe. Journal of Animal Science 27: 153-158.
33. Stakelum, G. and Dillon, P. 1990. Influence of sward structure and digestibility on the intake and performance of lactating and growing cattle. In: 'Management Issues for the Grassland Farmer in the 1990s'. British Grassland Society Occasional Symposium No 25, pages 30-44.