Influence of sward height, daily timing of concentrate supplementation, and restricted time for grazing on forage utilization by lactating beef cows

Journal of Animal Science

Volumn 83, Issue 6, 2005, Pages 1435-1444

  Gekara, O J ^a   Prigge, E C ^a   Bryan, W B ^a,b   Nestor, E L ^a   Seidel, G ^b  

^a WEST VIRGINIA UNIVERSITY   (United States)

^b NONE

Author keywords

Cows; Digestibility; Intake; Restricted Time for Grazing; Sward Height; Timing of Supplementation

Indexed keywords

BOS TAURUS; DACTYLIS; POA; POA PRATENSIS; TRIFOLIUM REPENS;

EID: 33646066312     PISSN: 00218812     EISSN: None     Source Type: Journal    
DOI: 10.2527/2005.8361435x     Document Type: Article

References (37)

1. Adams, D. C. 1985. Effect of time of supplementation on performance, forage intake and grazing behavior of yearling beef steers grazing Russian wild ryegrass in the fall. J. Anim. Sci. 61:1037-1042.
2. Allen, M. S. 1996. Physical constraints on voluntary intake of forages by ruminants. J. Anim. Sci. 74:3063-3075.
3. AOAC. 1990. Official Methods of Analysis. 15th ed. Assoc. Offic. Anal. Chem., Arlington, VA.
4. Baker, M. J., E. C. Prigge, and W. B. Bryan. 1988. Herbage production from hay fields grazed by cattle in fall and spring. J. Prod. Agric 31:275-279.
5. Barthram, G. T. 1986. Experimental techniques: The HFRO sward stick. Pages 29-30 in Biennial Report 1984/85, Hill Farming Research Organization, Penicuik, Midlothian, U.K.
6. Bryan, W. B., W. V. Thayne, and E. C. Prigge. 1990. Sward height and capacitance probe for estimating herbage mass. J. Agron. Crop Sci. 164:208-212.
7. Bullock, J. M. 1996. Plant competition and population dynamics. Pages 69-100 in The Ecology and Management of Grazing Systems. J. Hodgson and A. W. Illius, ed. CAB Int., Wallingford, U.K.
8. Forbes, T. D. A. 1988. Researching the plant-animal interface: The investigation of ingestive behavior in grazing animals. J. Anim. Sci. 66:2369-2379.
9. Gekara, O. J., E. C. Prigge, W. B. Bryan, M. Schettini, E. L. Nestor, and E. C. Townsend. 2001. Influence of pasture sward height and concentrate supplementation on intake, digestibility, and grazing time of lactating beef cows. J. Anim. Sci. 79:745-752.
10. Goering, H. K., and P. J. Van Soest. 1970. Forage Fiber Analyses (Apparatus, Reagents, Procedures, and Some Applications). Agric. Handbook No. 379. ARS, USDA, Washington, DC.
11. Hodgson, J. 1990. Grazing Management: Science into Practice. Longman Group, U.K.
12. Holt, D. A., and A. R. Hilst. 1969. Daily variation in carbohydrate content of selected forage crops. Agron. J. 61:239-242.
13. Hoover, W. H. 1986. Chemical factors involved in ruminant fiber digestion. J. Dairy Sci. 69:2755-2766.
14. Horn, G. W., and F. T. McCollum. 1987. Energy supplementation of grazing ruminants. Pages 125-136 in Proc. of the Grazing Livestock Nutr. Conf., Univ. of Wyoming, Laramie.
15. Khorasani, G. R., G. De Boer, B. Robinson, and J. J. Kennelly. 1994. Influence of dietary protein and starch on production and metabolic responses of dairy cows. J. Dairy Sci. 77:813-824.
16. Kolver, E., L. D. Muller, G. A. Varga, and T. W. Cassidy. 1998. Synchronization of ruminai degradation of supplemental carbohydrates with pasture nitrogen in lactating dairy cows. J. Dairy Sci. 81:2017-2028.
17. Minson, D. J. 1990. Forage in Ruminant Nutrition. Academic Press, Inc., San Diego, CA.
18. Mould, F. L., and E. R. Ørskov. 1984. Manipulation of rumen fluid pH and its influence on cellulolysis in sacco, dry matter degradation and the rumen microflora of sheep offered either hay or concentrate. Anim. Feed Sci. Technol. 10:1-15.
19. NRC. 2001. Nutrient Requirements of Dairy Cattle. 7th ed. Natl. Acad. Press, Washington, DC.
20. Orr, R. J., P. D. Penning, A. Harvey, and R. A. Chapman. 1997. Diurnal patterns of intake rate by sheep grazing monocultures of ryegrass or white clover. Appl. Anim. Behav. Sci. 52:65-77.
21. Orskov, E. R., and C. Fraser. 1975. The effects of processing barley based supplements on rumen pH, rate of digestion and voluntary intake in sheep. Br. J. Nutr. 34:493-500.
22. Pearson, C. J., and R. L. Ison. 1997. Pages 74-95 in Agronomy of Grassland Systems. 2nd ed. Cambridge Univ. Press, Cambridge, U.K.
23. Penning, P. D., A. J. Rook, and R. J. Orr. 1991. Patterns of ingestive behavior of sheep continuously stocked on monocultures of ryegrass or white clover. Appl. Anim. Behav. Sci. 31:237-250.
24. Prigge, E. C., W. B. Bryan, and E. S. Goldman-Innis. 1999. Early-and late-season grazing of orchardgrass and fescue hay fields over seeded with red clover. Agron. J. 91:690-696.
25. Prigge, E. C., W. B. Bryan, and E. L. Nestor. 1997. Sward height on performance of cow-calf units and yearling steers grazing cool season pasture. Proc. 18th Int. Grassl. Cong. Winnipeg/Saskatoon, Canada. 29:97-98.
26. Rayburn, E. B., and S. B. Rayburn. 1998. A standardized plate meter for estimating mass in on-farm research trials. Agron. J. 90:238-241.
27. Robertson, J. B., and P. J. Van Soest. 1981. The detergent system of analysis and its application to human foods. Pages 123-158 in The Analysis of Dietary Fiber. W. P. T. James and O. Theander, ed. Marcel Dekker, New York, NY.
28. Rook, A. J., C. A. Huckle, and P. D. Penning. 1994, Effects of sward height and concentrate supplementation on ingestive behavior of spring-calving dairy cows grazing grass-clover swards. Appl. Anim. Behav. Sci. 40:101-112.
29. Seath, D. M., and G. D. Miller. 1946. Effects of warm weather on grazing performance of milking cows. J. Dairy Sci. 29:199-206.
30. Sinclair, L. A., P. C. Garnsworthy, J. R. Newbold, and P. J. Buttery. 1993. Effect of synchronizing the rate of dietary energy and nitrogen release on rumen fermentation and microbial protein synthesis in sheep. J. Agric. Sci. (Camb.) 120:251-262.
31. Sniffen, C. J., and P. H. Robinson. 1987. Microbial growth and flow as influenced by dietary manipulations. J. Dairy Sci. 70:425-441.
32. Stobbs, T. H. 1970. Automatic measurement of grazing time by dairy cows on tropical grass and legume pastures. Trop. Grassl. 4:237-244.
33. Sunvold, G. D., and R. C. Cochran. 1991. Evaluation of ADL, APL, AIA, and IADF as internal markers for prediction of alfalfa, bromegrass, and prairie hay digestibility by beef steers. J. Anim. Sci. 69:4951-4955.
34. Van Soest, P. J. 1994. Pages 165-195 in Nutritional Ecology of the Ruminant. Cornell Univ. Press, Ithaca, NY.
35. Van Soest, P. J., J. B. Robertson, and B. A. Lewis. 1991. Methods for dietary fiber, neutral detergent fiber and non-starch polysaccharides in relation to animal nutrition. J. Dairy Sci. 74:3583-3597.
36. Van Vuuren, A. M., C. J. Van der Koelen, and J. Vroons-de Bruin. 1986. Influence of the level and composition of concentrate supplements on rumen fermentation patterns of grazing dairy cows. Neth. J. Agric. Sci. 34:457-467.
37. Youngberg, H. W., D. A. Holt, and V. L. Lechtenberg. 1972. Diurnal variation in nitrogenous constituents of alfalfa. Agron. J. 64:288-291.