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This article in AJ

  1. Vol. 94 No. 1, p. 109-117
     
    Received: Jan 17, 2001


    * Corresponding author(s): jeturn@mail.uark.edu
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doi:10.2134/agronj2002.1090

Changes in Nutritive Value of Bermudagrass Hay during Storage

  1. James E. Turner *,
  2. Wayne K. Coblentz,
  3. Dean A. Scarbrough,
  4. Kenneth P. Coffey,
  5. D. Wayne Kellogg,
  6. Levi J. McBeth and
  7. Robert T. Rhein
  1. Dep. of Animal Sci., Univ. of Arkansas, Fayetteville, AR 72701

Abstract

Relatively little is known about storage of wet (>200 g kg−1 moisture) bermudagrass [Cynodon dactylon (L.) Pers.] hay. Our objective was to assess the changes in nutritive value of bermudagrass hay as a function of hay moisture, storage time, and spontaneous heating. ‘Greenfield’ bermudagrass was grown on a Pickwick silt loam soil (fine-silty, mixed, semiactive, thermic Typic Paleudult) and packaged in conventional rectangular bales at 219, 265, and 302 g kg−1 moisture [low-moisture (LM), medium-moisture (MM), and high-moisture (HM) bales, respectively]. Concentrations of most fiber and fiber-associated N components increased (P < 0.05) during storage, but these changes occurred primarily during the first 12 d. A nonlinear model ( Y = α βekt2) was used to describe the changes in neutral detergent fiber (NDF), acid detergent fiber, lignin, neutral detergent–insoluble N, and acid detergent–insoluble N (ADIN) during storage. The total changes (β) in NDF were 93.1, 69.5, and 67.8 g kg−1 for HM, MM, and LM bales, respectively. Respective asymptotic maxima for NDF (α) in these treatments were 777, 757, and 739 g kg−1 For ADIN, respective asymptotic maxima (α) reached 3.17, 1.83, and 1.71 g kg−1 for HM, MM, and LM bales, respectively. On Day 65, ADIN exceeded 10% of the entire N pool in both HM and MM bales. The nutritive value of bermudagrass hay baled and stored at >200 g kg−1 moisture deteriorates during storage, and the greatest deterioration occurs during the first 12 d after baling.

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Copyright © 2002. American Society of AgronomyPublished in Agron. J.94:109–117.