Effects of rumensin anti-bloat capsules on plasma magnesium concentration and aspects of health and performance of pastured dairy cows

G.F. Wilson, G.A. Lynch, C. Van Der Wel

Department of Animal Science, Massey University, Palmerston North, New Zealand

Proceedings of the New Zealand Society of Animal Production. 1993, 53: 247-250

One hundred and twenty three Friesian or Friesian x Jersey mature dairy cows were used to examine the effects of Rumensin Anti- bloat Capsules (ABC), containing sodium monesin on plasma magnesium, glucose and þ-hydroxybutyrate concentrations. Forty one cows received the ABC 3-8 weeks prior to calving, 41 immediately after calving and 41 were control animals. The experiment was undertaken early in the spring prior to the period during which bloat normally becomes a problem.

The ABC increased plasma magnesium concentrations relative to the control cows prior to calving (ABC 0.783 v Control 0.733 m mol/l; P<0.04), but not after calving. Plasma glucose concentrations were raised significantly (P<0.01) by the ABC both before (ABC 1.320 v Control 1.583 m mol/l), and after calving (ABC 1.510 v Control 1.777 m mol/l).

Differences between treatments in body weight, milk production and reproductive parameters were not significant, but there was a suggestion that ABC protected the cows from clinical mastitis.

It is concluded that use of the Anti-bloat capsules should help improve the health of dairy cows.

Keywords: NZSAPAB; Sodium monensin; plasma magnesium; pastured dairy cows; Rumensin anti-bloat capsules.

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Last Updated 25-01-1997