• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Effect of corn grain processing on lactational performance, nutrient utilization and metabolism in dairy cows.

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_td_9706168_sip1_m.pdf
    Size:
    3.049Mb
    Format:
    PDF
    Description:
    azu_td_9706168_sip1_m.pdf
    Download
    Author
    Yu, Pinliang
    Issue Date
    1996
    Committee Chair
    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
    Three experiments were conducted to determine effects of corn grain processing on lactational performance and nutrient utilization in dairy cows; and to evaluate feeding value of Amaferm (a culture of Aspergillus oryzae) for lactating cows. In trial I, 40 lactating Holstein cows were allotted to five Dietary treatments containing 40% corn grain as finelyground (FG), coarsely-ground (CG) , steam-flaked (SFL, 309 giL), steam-flaked (SFM, 361 giL), or steam-rolled (SR, 490 giL). The SFM increased milk yield 1.6 kgld more than FG, and an average 2.5 kgld more than CG, SFL, or SR. Diets with FG increased efficiency of feed utilization 16% because of the lower DMI. Diets with SFL had lower milk fat content than CG or SR. Starch digestibility in the total digestive tract was higher for FG, SFL, or SFM than for CG or SR. In trial 2, 32 Holstein cows were used in a 2x2 factorial arrangement of treatments for 70d. The four diets were: 1) steam-flaked corn (SFC, 361 giL) + 3 gld Amaferm 2) SFC without Amaferm, 3) steam-rolled corn (SRC, 490 giL) + 3 gld Amaferm, and 4) SRC without Amaferm. Intake was not affected by processing of grain or addition of Amaferm. Compared with rolled, flaked corn increased milk yield 2.1 Kg/d, milk protein percentage .09%, milk protein yield 8.5%, lactose yield 5.4%, and efficiency of feed utilization 8%. Addition of Amaferm had no significant effects on lactational performance, rectal temperatures or respiration rates of lactating cows during the hot summer conditions of the study. In trial 3, 5 cannulated lactating Holstein cows were used in a 5 x 5 Latin square design. Dietary treatments were: l) FG; 2) CG; 3) SFL; 4) SFM; and 5) SR. Diets with SR had lower DMI than CG. Diets with FG, SFL, or SFM had lower ruminal pH than CG or SR. Rumen NH₃ concentrations were higher for FG and CG than for SFL, SFM and SR. Total VFA concentrations were higher for FG and SFL than for SR. The C₂:C₃ ratio was lower for SFL and SFM than for CG, FG and SR. Diets containing FG, SFL, and SFM resulted in higher total tract starch digestibilities than that with SR.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Animal Sciences
    Graduate College
    Degree Grantor
    University of Arizona
    Collections
    Dissertations

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.