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    Utilization of liquid acid whey by lactating dairy cows

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    Author
    DeCorte, Connie Marie, 1962-
    Issue Date
    1990
    Keywords
    Agriculture, Animal Culture and Nutrition.
    Advisor
    Huber, John T.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Two trials were conducted, the first of which was a 56 d trial with 24 Holstein cows in mid lactation. Treatments were 100% water (T1) or 100% liquid acid whey (T2). Cows on T2 had decreased DM intake and 3.5% FCM, and increased milk fat and protein. Milk fatty acids shifted towards higher medium chained fatty acids for cows on T2 and higher C18 and C18:1 for cows on T1. Molar % of rumen VFA's for cows on T2 decreased for C2, C3, and branched chain fatty acids and increased for C4, C5, and C6. There was no correlation between storage time of whey and whey intake. In the second trial, treatments were arranged in a repeated 3 x 3 latin square design. Six lactating cows were fitted with duodenal cannulae (2 fitted with ruminal cannulae). Treatments were 100% water (T1), 50% water and 50% whey (T2) and 100% whey (T3). The digesta marker was Cr₂O₃. Periods were 12 d with sampling on the last 4 d. Compared to T1, rumen C2 decreased on T2 and T3 and rumen C5 increased on T3 while milk fatty acids shifted towards higher C12 and C14 and lower C18.
    Type
    text
    Thesis-Reproduction (electronic)
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Animal Sciences
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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