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Performance of dairy cows on an unusual calcium-phosphorus ratio

Oklahoma A. & M. College

Abstract

Considerable study has been devoted to the calcium-phosphorus ratio in rations of dairy cattle and the ratio of these elements as utilized by the animal. From these studies the conclusion has been drawn that the ratio of calcium to phosphorus as supplied in the feed should be within certain limits. Two important basic principles have therefore been associated with the problem of supplying adequate amounts of calcium and phosphorus in feeding milk cows. First, that the continued well-being of a good milk cow is, in addition to other requirements, dependent on a feeding practice which will provide amounts of calcium and phosphorus necessary for body maintenance, milk production, and reproduction. Secondly, it has been the opinion of many investigators that there should also be a certain rather definite ratio between the amounts of these elements as supplied in the ration. A great excess of either of these minerals has been considered as a likely cause of detrimental effects.