Response of Lactating Cows to Abomasal Infusions of Casein,
Methionine and Glucose
G.L. Rogers and L.M. McLeay
Ruakura Agricultural Research Centre, Hamilton
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Proceedings of the New Zealand Society of Animal Production. 1977, 37: 46-49
Nine cows, surgically fitted with abomasal cannulae, were used
in five experiments to investigate the effects of abomasal infusions of
casein, glucose and methionine on milk yield and composition. Cows were
offered constant amounts of high-moisture pasture silage or pasture. The
milk yield and milk protein concentration of cows on the silage ration
were increased by abomasal infusions of casein in five experiments.
Methionine gave a similar response to casein, whereas an isocaloric
infusion of glucose did not alter milk protein yield above the controls
for the silage ration. Responses of cows to abomasal infusions of casein
were significantly greater for cows offered silage in comparison with
pasture. The studies indicate a specific response to abomasally infused
casein and methionine in cows fed pasture silage.
Keywords: NZSAPAB;
Last Updated 24-08-2000
