The effects of copper supplementation on stock health and production. 3. The effect of parenteral copper on the milk yield characteristics of a dairy herd with hypocuprosis

The effects of copper supplementation on stock health and production. 3. The effect of parenteral copper on the milk yield characteristics of a dairy herd with hypocuprosis
Peer reviewed

Abstract

Hypocuprosis in Northland dairy herds has been shown to be associated with the incidence of post-parturient haemoglobinuria (P.P.H.) and with a general anaemia within such affected herds (Smith, 1973). Indications were that parenterally administered copper resulted in a lowered incidence of P.P.H. and a general improvement, in stock health (Parts 1 and 2 of this paper). Quantitative information was needed, however, to evaluate the effects of copper injections on subsequent seasonal milk production of hypocuprotic herds. Part 3 describes the results of an experiment designed to quantitate the effects of parenteral copper on various milk yield characteristics within the same herd that provided data for Part 2 of this paper.

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