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Ammonia and hydrogen ion concentration in the rumen content of wethers fed rations differing in nitrogen sources 1

Ammonia and hydrogen ion concentration in the rumen content of wethers fed rations differing in nitrogen sources 1

Zhivotnov"dni Nauki 16(2): 96-102

Latin square trials were conducted involving fistulated wethers, fed meadow hay and maize meal containing rations of 12% crude protein level. Sunflower oil meal, urea, Starea or Golden Pro with .apprxeq. 25% nonprotein N in the ration served as an additional protein source. Urea included in the ration for experiment animals leads to a considerable and rapid increase in ammonia level in the rumen content. Ammonia concentration for these rations is highest 1/2 h after feeding (35.96-43.98 mg/100 ml). The prolonged maintenance of comparatively higher ammonia concentration in the rumen content with Golden Pro rations in comparison with the other rations is probably due to the bentonite included in its composition. The absolute pH values of the rumen content do not differ significantly for rations containing urea in various forms.

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