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Assessment of Mineral Status in Domestic Animals: Introductory Remarks^1,2,

University of Florida³, Gainesville 32611

Abstract

Mineral elements have been recognized for many years as essential dietary nutrients for animals. One group of these elements, generally referred to as "macro" but sometimes as "major" or "bulk" mineral elements, includes calcium, phosphorus, potassium, sodium, chlorine, magnesium and sulfur. The designating terms originated in part from quantities present in the animal body and amounts required in the diet. Another group of elements, referred to as "micro", "trace" or "minor" mineral elements because of comparatively lesser quantities in the animal body and smaller amounts required in the diet, includes iron, manganese, copper, iodine, cobalt, zinc and selenium. The need to suplement the usual dietary ingredients with these elements to assure efficient animal production has been demonstrated under many practical feeding situations. Other micro-mineral elements for which there is evidence of essentiality in animals include molybdenum, vanadium, nickel, chromium, tin, silicon, arsenic, lead and fluorine (Underwood, 1977).

¹ Florida Agric. Exp. Sta. Journal Ser. No. 7556.

² Presented at the Symposium on "Assessment of Mineral Status in Domestic Animals," sponsored by the Regulatory Agencies Committee, ASAS, and held during the 78th Annu. Meet. of the Am. Soc. Anim. Sci., Kansas State Univ. Manhattan, July 30, 1986.

³ Dept. of Anim. Sci.