Free Access
Anim. Res.
Volume 52, Number 4, July-August 2003
Page(s) 321 - 336


  1. AFRC, Energy and Protein Requirements of Ruminants. An Advisory Manual Prepared by the AFRC Technical Committee on Response to Nutrients, CAB International,Wallingford, UK, 1993.
  2. Butler S.B., Stakelum G.K., Murphy J.J., Delaby L., Rath M., O'Mara F.P., The relationship between milk production and herbage intake of grazing dairy cows, Anim. Sci. (2003) in press.
  3. Caird L., Holmes W., The prediction of voluntary intake of grazing dairy cows, J. Agric. Sci. (Camb.) 107 (1986) 43-54.
  4. Castle M.E., Watson J.N., A comparison between diploid and a tetraploid perennial ryegrass for milk production, J. Agric. Sci. (Camb.) 77 (1971) 69-76.
  5. Connolly V., Breeding Improved Varieties of Perennial Ryegrass, Teagasc Report, ISBN 1 84170, 2001.
  6. Culleton N., Murphy W.E., Reseeding new perspectives on grasses and clovers, Farm and Food, Vol. 8, No. 2 Summer, 1998.
  7. Curran M.K., Holmes W., Prediction of voluntary intake of food by dairy cows. 2. Lactating grazing cows, Anim. Prod. 12 (1970) 213-224.
  8. DAFRD, Department of Agriculture, Food and Rural Development, Irish Recommended list of Herbage Varieties, Yearly Public, 2002.
  9. DelabyL., Peyraud J.L., DelagardeR., Effects of level of concentrate supplementation, herbage allowance and milk yield at turn-out on the performance of dairy cows inmid-lactation at grazing, Anim. Sci. 73 (2001) 171-181.
  10. Delaby L., Peyraud J.L., BouttierA., Pecatte J.R., Effect of grazing conditions and supplementation on herbage intake by dairy cows, Renc. Rech. Ruminants 6 (1999) 139.
  11. Dillon P., The use of n-alkanes as markers to determine herbage intake, botanical composition of available or consumed herbage and in studies of digesta kinetics with dairy cows, Ph.D. Thesis, Nat. Univ. Ireland, 1993.
  12. Dillon P., Crosse S., Stakelum G., Flynn F., The effect of calving date and stocking rate on the performance of spring calving dairy cows, Grass Forage Sci. 50 (1995) 286-299.
  13. Dillon P., Stakelum G., Herbage and dosed alkanes as a grass measurement technique for dairy cows, Irish J. Agric. Res. 28 (1989) 104.
  14. Emile J.-C., Hazard L., Betin M., Monnerie C., Cultivar effect in perennial ryegrass on milk production of dairy cows, Proc. of the 18th Gen. Meet. Eur. Grassl. Fed., 2000, pp. 235-237.
  15. Gately T., Early versus late perennial ryegrass (Lolium perenne) for milk production, Irish J. Agric. Res. 23 (1984) 1-11.
  16. Gowen N., O' Donovan M., Casey I., Stakelum G.,Rath M., Effect of perennial ryegrass cultivar on the milk production performance of rotationally grazed spring calving cows, Proceedings of the 19th Gen. Meet. European Grassl. Fed., 2002, pp. 568-569.
  17. Greenhalgh J.F.D., Reid G.W., Aitken J.N., Florence E., The effects of grazing intensity on herbage consumption and animal production. 1. Short-term effects in strip-grazed dairy cows, J. Agric. Sci. 67 (1966) 12-23.
  18. Hageman I.W., Lantinga E.A., Schlepers H., Herbage intake, digestibility characteristics and milk production of some diploid and tetraploid perennial ryegrass cultivars, Proc. of the 2nd Brit. Grassl. Soc. Res. Conf., Scot. Agric. College, Ayr., 1990, Paper 5.
  19. Hodgson J.,Variations in the surface characteristics of the sward and the short term rate of herbage intake by calves and lambs, Grass Forage Sci. 36 (1981) 49-57.
  20. Hutchings N.J., Spatial heterogeneity and other sources of variance in sward height as measured by the sonic and HFRO sward sticks, Grass Forage Sci. 46 (1991) 277-282.
  21. Kolver E.S., Muller L.D., Performance and nutrient intake of high producing Holstein cows consuming pasture or a total mixed ration, J. Dairy Sci. 81 (1997) 1403-1411.
  22. Lantinga E.A., Groot J.C.J., Optimization of grassland production and herbage feed quality in an ecological context, EAAP Public. No. 84, 1996, pp. 58-67.
  23. Lowman B.G., Scott N., Somerville S., Condition scoring of cattle, Rev. Edition, Bulletin East Scotland College of Agric., 1976, No. 6.
  24. Mayes R.W., Lamb C.S., Colgrove P.A., The use of dosed herbage n-alkanes as markers for the determination of herbage intake, J. Agric. Sci. 107 (1986) 161-170.
  25. McCallum D.A., Thomson N.A., The effect of different perennial ryegrass cultivars on dairy animal performance, Proc. of the N.Z. Soc. Anim. Prod. 54 (1994) 87-90.
  26. McGilloway D.A., Cushnahan A., Laidlaw A.S., Mayne C.S., Kilpatrick D.J., The relationship between level of sward height reduction in a rotationally grazed swards and short-term intake rates of dairy cows, Grass Forage Sci. 54 (1999) 116-126.
  27. Minson D.J., Raymond W.F., Harris C.E., Millford R.J., Studies in the digestibility of herbage, J. Brit. Grassl. Soc. 15 (1960) 174-180.
  28. Morgan D.J., Stakelum G., Dwyer J., Modified neutral detergent cellulase digestibility procedure for use with the `Fibertec' system, Irish J. Agric. Res. 28 (1989) 91-92.
  29. O'Donovan M., The relationship between the performance of dairy cows and grassland management on intensive dairy farms in Ireland, Ph.D. Thesis, Nat. Univ. of Ireland, 2000.
  30. O'Riordan E.G., Grazing preference among Lolium perenne cultivars, Proc. of the Agric. Res. Forum, 1997, pp. 139-140.
  31. Parga J., Peyraud J.L., Delagarde R., Effect of sward structure and herbage allowance on herbage intake by the grazing dairy cows, in:Grazing management, the principles and practise of grazing for profit and environmental gain in temperate grassland system, Harrogate, Brit. Grassl. Soc., 2000.
  32. Peyraud J.L., Gonzalez-Rodriguez A., Relations between grass production, supplementation and intake in grazing dairy cows, Proceedings of the Grassl. Farming, balancing environmental and economic demands, EGF Vol. 5, Grassland Sci. in Europe, 2000, pp. 269-282.
  33. Peyraud J.L., Comeron E.A., Wade M.H., Lemaire G., The effect of daily herbage allowance, herbage mass and animal factors upon herbage intake by grazing dairy cows, Ann. Zootech. 45 (1996) 201-207.
  34. Rook J.A.F., Campling R.C., Effect of stage and number of lactation on yield and composition of cows milk, J. Dairy Sci. 32 (1965) 45.
  35. Sheehy S.J., The competitives of grass silage, University College Dublin, Occ. Public., 2000.
  36. Stakelum G., O'Donovan M., Grazing severity, sward digestibility and intake and farm cover targets for profitable summer milk production, in: Fitzgerald S. (Ed.), The production of high quality milk from grass and other feeds, in Irish Effect of grass cultivars on milk performance of grazing dairy cows 335 Grain and Feed Assoc. and Teagasc Moorepark, 1998, pp. 1-16.
  37. Statistics Analysis Systems Institute, User's Guide: Statistics, SAS Institute, Cary, North Carolina, 1991.
  38. Sweeney R.A., Generic combustion method for determination of crude protein in feeds: collaborative study, J. Assoc. Off. Anal. Chem. 72 (1989) 770-774.
  39. Thomas H., Terminology and definitions in studies of grassland plots, Grass Forage Sci. 35 (1980) 13-23.
  40. Tyrrell H.F., Reid J.T., Prediction of the energy value of milk, J. Dairy Sci. 48 (1965) 1215-1223.
  41. Vazquez O.P., Smith T.R., Factors affecting pasture intake and total dry matter intake in grazing dairy cows, J. Dairy Sci. 83 (2000) 2301-2309.
  42. Vipond J.E., Swift G., McCelland T.H., Milne J.A., Hunter E.A., A comparison of diploid and tetraploid perennial ryegrass and tetraploid ryegrass/white clover swards under continuous sheep stocking at controlled swards heights. 2. Animal production, Grass Forage Sci. 48 (1993) 290-300.


Copyright INRA, EDP Sciences