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Research-Article| Volume 70, ISSUE 7, P1391-1403, July 1987

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Influence of Feed Ion Content on Buffering Capacity of Ruminant Feedstuffs In Vitro1

  • D.K. Jasaitis
    Affiliations
    Cook College, Rutgers–The State University, New Brunswick, NJ 08903
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  • J.E. Wohlt
    Affiliations
    Cook College, Rutgers–The State University, New Brunswick, NJ 08903
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  • Author Footnotes
    2 Department of Animal Sciences.
    J.L. Evans
    Footnotes
    2 Department of Animal Sciences.
    Affiliations
    Cook College, Rutgers–The State University, New Brunswick, NJ 08903
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  • Author Footnotes
    1 New Jersey Agricultural Experiment Station Publication Number D-O69O1-3-86, supported by state and USDA Animal Health funds. Financial support was also received from Agway Inc., Syracuse, NY; Church & Dwight Co., Inc., Princeton, NJ; and the Harold Wetterberg Foundation, Princeton, NJ.
    2 Department of Animal Sciences.
Open ArchiveDOI:https://doi.org/10.3168/jds.S0022-0302(87)80161-3
Influence of Feed Ion Content on Buffering Capacity of Ruminant Feedstuffs In Vitro1
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      Abstract

      In vitro buffering capacity of 52 feeds was measured to determine the buffering capacity range within and among feed types. Feeds were analyzed for dry matter, total ash, minerals (Ca, Mg, K, Na, Cl, N, P, Si, S), pH, titratable acidity and alkalinity, acid-buffering capacity, and base-buffering capacity (milliequivalents of acid or base required to bring .5 g dry matter suspended in 50 ml distilled deionized water to pH 4 or 9, respectively, divided by total pH change). Buffering capacity was lowest for energy feeds, intermediate for low protein feeds (15 to 35% crude protein) and grass forages, and highest for high protein feeds (>35% crude protein) and legume forages. The concept of diet formulation for a predetermined buffering capacity was tested. Two isonitrogenous and isocaloric diets substantially different from each other in buffering capacity were formulated using ingredients from the pool of 52 feeds. The measured acid-buffering capacity of these diets was similar to their predicted values. Acid buffering capacity was correlated with total cations and total ash. However, simple linear regression was not sufficient to predict accurately acid-buffering capacity from total ash values. Further studies are needed to provide a better estimate of feed-buffering capacity.

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      Article info

      Publication history

      Accepted: March 23, 1987
      Received: October 10, 1986

      Identification

      DOI: https://doi.org/10.3168/jds.S0022-0302(87)80161-3

      Copyright

      © 1987 American Dairy Science Association. Published by Elsevier Inc.

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