While grass may suffice to meet the nutritional needs of grazing ruminants in terms of carbohydrate and protein, they may not necessarily provide the minimal levels of minerals necessary to maintain health. Since, with the exception of salt, it is unusual to provide supplementary minerals it is necessary to ensure that the grazed grass is so managed that mineral levels are adequate. This article reviews the various factors that influence the mineral profiles of tropical grasses in the Caribbean, Latin America, and Africa.
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References
1.
YoussefF. G. In ‘Trace Elements in Man and Animals–TEMA 5’. MillsC. F., BremnerI., and ChesterJ. K. (eds). pp. 857–859. Commonwealth Agricultural Bureaux, Farnham Royal, 1985.
2.
YoussefF. G. In ‘Feeding of Ruminants in Tropical Humid Conditions'. INRA Centre Antilles-Guyana, Pointe-a-Pitre Cedex, Guadeloupe, 1987.
3.
McDowellL. R. In ‘Nutrition of Grazing Ruminants in Warm Climates'. McDowellL. R. (ed.). pp. 359–387. Academic Press, New York, 1985.
4.
YoussefF. G., and BrathwaiteR. A. I.Trop. Agric. (Trinidad). 64, 122, 1987.
5.
Kayongo-MaleH., and ThomasJ. W.E. Afr. agric. For. J. 40, 428, 1975.
6.
ReidR. L., PostA. J., and OlsenF. J.‘Chemical Composition and Quality of Tropical Forages'. West Virginia University Bull. No. 669T. 1979.
7.
YoussefF. G.PersadN. K., TaylorG., and RamlalH. In ‘21st Annual Caribbean Food Crops Society Meeting and 32nd Annual Meeting of American Society for Horticulture Science – Tropical Region’. Port-of-Spain, Trinidad, 1985.
8.
BredonR. M., and HorrellC. R.Trop. Agric. (Trinidad), 39, 13, 1962.
9.
Agricultural Research Council.‘The Nutrient Requirements of Ruminant Livestock’. Commonwealth Agricultural Bureaux, Farnham, Royal, 1980.
10.
DijkshoornW. In ‘Chemistry and Biochemistry of Herbage’. ButlerG. W., and BaileyR. W. (eds). Vol. 2, pp. 163–188. Academic Press, New York, 1973.
11.
NortonB. W. In ‘Nutritional Limits to Animal Production from Pastures'. HackerJ. B. (ed.). pp. 89–110. Commonwealth Agricultural Bureaux, Farnham Royal.1982.
12.
LongM. I. E., NdyanaboW. K., MarshallB., and ThorntonD. D.Trop. Agric. (Trinidad). 46, 201, 1969.
13.
GomideJ. A., NollerC. H., MottG. O., ConradJ. H., and HillD. L., Agron. J. 61, 116, 1969.
14.
JonesD. I. H.Rhod. J. Agric. Res. 2, 57, 1964.
15.
HackerJ. B. In ‘Nutritional Limits to Animal Production from Pastures'HackerJ. B. (ed.). pp. 305–326. Commonwealth Agricultural Bureaux, Farnham Royal, 1982.
16.
GriffithsG., and WaltersR. J. K.J. agric. Sic., Camb., 67, 81, 1966.
FlemingG. A. In ‘Chemistry and Biochemistry of Herbage’. ButlerG. W., and BaileyR. W. (eds). Vol. 1. pp. 529–566. Academic Press, New York, 1973.
20.
YoussefF. G., PersadN. K., and RamlalH. In ‘Tenth Caribbean Conference of Chemistry and Chemical Engineering’. University of the West Indies, Trinidad, 1983.
21.
TergasL. E., and BlueW. G., Agron. J. 63, 6, 1971.
22.
YoussefF. G., PersadN. K., RamlalH., and RastogiR. K.In ‘17th West Indies Agricultual Economics Conference’. University of the West Indies, Trinidad. 1984.
23.
GomideJ. A. In ‘Proceedings Latin American Symposium on Mineral Nutrition Research with Grazing Ruminants'ConradJ. H., and McDowellL. R. (eds). pp. 32–40. University of Florida, Gainesville, 1978.
LittleD. A. In ‘Nutritional Limits to Animal Production from Pastures'. HackerJ. B. (ed.). pp. 259–283. Commonwealth Agricultural Bureaux, Farnham Royal, 1982.
26.
Vincente-ChandlerJ., AbrunaF., Caro-CostaR., FigarellaJ., SilvaS., and PearsonR. W. In ‘Intensive Grassland Management in the Humid Tropics of Puerto Rico’. University of Puerto Rico Bull. No. 233, 1974.
27.
Valez-SantiagoJ., and Arroyo-AguiluJ. A.J. Agric. Univ. P.R., 67, 61, 1983.
28.
OlsenF. J.Trop. Agric. (Trinidad)51, 523, 1974.
29.
RamosN., HerreraR. S., and CurbeloF.Cuban J. Agric. Sci., 17, 93, 1983.
30.
De SousaJ. C.Interrelationships among mineral Levels in Soil, Forage and Animal Tissues on Ranches on Northern Mato Grosso, Brazil’. Ph.D. Thesis. University of Florida. 1978.
