Cited by 75Ruminant Nutrition and Digestive PhysiologyCrop Yield and Soil FertilityAgricultural Engineering and Mechanization

Effect of hybrid, maturity, and mechanical processing of corn silage on intake and digestibility by beef cattle

Andrae, J G, Hunt, C W, Pritchard, G T, Kennington, L R, Harrison, J H, Kezar, W, Mahanna, W·2001·Journal of Animal Science

Abstract

A study involving a 2 x 2 x 2 factorial arrangement of treatments was conducted to evaluate effects of hybrid (Pioneer 3335 and 3489), maturity (half milkline and blacklayer), and mechanical processing (field chopper with and without on-board rollers engaged) on intake and digestibility of corn silage. Forty Angus steers (322 +/- 5.2 kg BW) were assigned to the eight silage treatments (five steers per treatment) and individually fed using electronic gates. Diets consisted of 60% corn silage and 40% chopped alfalfa hay (DM basis). Following a 5-d adaptation period, intake was measured for 7 d and subsequently fecal samples were collected for 5 d. Chromic oxide (5 g/d) was fed beginning 7 d before fecal sample collection and digestibility was determined by the ratio of Cr in the feed and feces. Steers were reallocated to treatments and these procedures were repeated, providing 10 observations per treatment. In addition, all silages were ruminally incubated in six mature cows for 0, 8, 16, 24, 48, and 96 h to determine extent and rate of DM, starch, NDF, and ADF disappearance. Processing increased DMI of hybrid 3489 but did not affect DMI of hybrid 3335 (hybrid x processing; P < 0.06). Total tract digestibility of DM, starch, NDF, and ADF decreased (P < 0.01) as plant maturity increased. Maturity tended to decrease starch digestibility more for hybrid 3489 than for hybrid 3335 (hybrid x maturity; P < 0.10). Processing increased (P < 0.01) starch digestibility but decreased (P < 0.01) NDF and ADF digestibility, resulting in no processing effect on DM digestibility. There was a numerical trend for processing to increase starch digestibility more for latethan for early-maturity corn silage (maturity x processing; P = 0.11). Processing increased in situ rates of DM and starch disappearance and maturity decreased in situ disappearance rates of starch and fiber. These data indicate that hybrid, maturity, and processing all affect corn silage digestibility. Mechanical processing of corn silage increased starch digestibility, which may have been associated with the observed decreased fiber digestibility.

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Crossref · 10.2527/2001.7992268x

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Authors
Andrae, J. G., Hunt, C. W., Pritchard, G. T., Kennington, L. R., Harrison, J. H., Kezar, W., & Mahanna, W.
Affiliations
  • University of Idaho (US)
  • Washington State University (US)
  • Pioneer Hi-Bred (US)
Corresponding author
Hunt, C W
Venue
Journal of Animal Science
Published
2001
Volume
79
Issue
9
Pages
2268
ISSN
0021-8812 (ISSN-L)
OpenAlex
W2171894728
Cited by
75
References
29
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 2 · 2020: 5 · 2019: 5 · 2018: 4 · 2017: 2 · 2016: 2 · 2015: 4 · 2014: 6 · 2013: 2
FWCI
6.19
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Animal Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Crop Yield and Soil Fertility
  • Physical Sciences › Engineering › Mechanical Engineering › Agricultural Engineering and Mechanization
Keywords
corn silage, maize hybrids, plant maturity, mechanical processing, beef cattle, dry matter intake, nutrient digestibility, starch digestibility, fiber digestibility, Angus steers, silage additives, ruminant nutrition, neutral detergent fiber, ADF
MeSH terms
Adaptation, Physiological, Medicago sativa, Animals, Cattle, Zea mays, Dietary Fiber, Digestion, Eating, Feces, Food Handling, Male, Nutritive Value, Particle Size, Pilot Projects, Random Allocation, Silage, Starch

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