Effect of mineral salts, carbachol, and pilocarpine on nutrient digestibility and ruminal characteristics in cattle

Fifty percent concentrate diets containing 2% sodium bicarbonate, sodium chloride, or no additional mineral salts were fed at a rate of 86 g dry matter/kg body weight X 75/d to three barren Holstein cows fitted with ruminal fistulas in a 3 X 3 Latin square design. Dietary adaptation was 14 d followe...

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Bibliographic Details
Published in:Journal of dairy science 1987-03, Vol.70 (3), p.592-600
Main Authors: Wiedmeier, R.D, Arambel, M.J, Lamb, R.C, Marcinkowski, D.P
Format: Article
Language:English
Subjects:
Animals
Bicarbonates - pharmacology
BOVIN LAITIER
Carbachol - pharmacology
Cattle - physiology
DAIRY CATTLE
DIET
DIETA
DIGESTIBILIDAD
DIGESTIBILITE
DIGESTIBILITY
Digestion - drug effects
Female
GANADO DE LECHE
MEDICAMENT NEUROTROPE
MEDICAMENTOS NEUROTROPICOS
METABOLISM
METABOLISME
METABOLISMO
MINERALES
MINERALS
MINERAUX
NEUROTROPIC DRUGS
NUTRIENTES
NUTRIENTS
Pilocarpine - pharmacology
REGIME ALIMENTAIRE
RUMEN
Rumen - drug effects
SALES
SALTS
SEL
Sodium - pharmacology
Sodium Bicarbonate
Sodium Chloride - pharmacology
SUBSTANCE NUTRITIVE
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Summary:Fifty percent concentrate diets containing 2% sodium bicarbonate, sodium chloride, or no additional mineral salts were fed at a rate of 86 g dry matter/kg body weight X 75/d to three barren Holstein cows fitted with ruminal fistulas in a 3 X 3 Latin square design. Dietary adaptation was 14 d followed by 4 d collection. Ruminal pH, liquid volume, liquid dilution rate, and particulate rate of passage were increased with dietary mineral salts. Six Holstein cows fitted with ruminal fistulas were administered .01 mg carbachol/kg body weight/d, .10 mg pilocarpine/kg body weight/d, or saline placebo via subcutaneous, osmotically controlled pumps in a replicated 3 X 3 Latin square design. Treatments were administered for a 14-d adaptation period followed by an 8-d collection period. Both carbachol and pilocarpine increased liquid dilution rate, particulate rate of passage, and percent cellulolytic bacteria, whereas liquid volume was reduced.
ISSN:0022-0302
1525-3198
DOI:10.3168/jds.S0022-0302(87)80046-2