Milk composition as affected by intra-ruminal infusion of volatile fatty acids to cows on a restricted ration

Autor:	G. F. Wilson, R. M. Dolby, A. W. F. Davey
Rok vydání:	1967
Předmět:	food and beverages Soil Science Plant Science Reichert value Butyric acid Butterfat Acetic acid chemistry.chemical_compound Rumen medicine.anatomical_structure chemistry Lactation medicine Hay Animal Science and Zoology Composition (visual arts) Food science Agronomy and Crop Science
Zdroj:	New Zealand Journal of Agricultural Research. 10:215-225
ISSN:	1175-8775 0028-8233
DOI:	10.1080/00288233.1967.10425129
Popis:	Dilute solutions of acetic, propionic, and butyric acids were infused into the rumens of six lactating cows receiving a restricted hay and concentrate ration. Milk yield and composition. characteristics of the butterfat, and concentration of individual volatile fatty acids in the rumen liquor were determined. All three acids raised milk yield (P < 0.05). Increased yields of butterfat (P < 0.10) and solids-not-fat (P < 0.05) were obtained with acetic acid, but the percentage composition was not changed significantly. Propionic acid lowered the daily butterfat yield (P < 0.10) and butterfat percentage (P < 0.05). but increased the protein yield (P < 0.05) and percentage (P < 0.01), and hence increased the level of solids-not-fat in the milk. Butyric acid increased (P < 0.05) the yield and the percentage of butterfat (P < 0.05) and decreased (P < 0.05) the solids-not-fat percentage in the milk. The three acids lowered the iodine values of the butterfat. Butyric acid increased the Reichert value of t...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5c8aa5317bc3274ad41a062cc9c4316b https://doi.org/10.1080/00288233.1967.10425129 Zobrazit plný text záznamu