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Cited by 250Ruminant Nutrition and Digestive PhysiologyCrop Yield and Soil FertilityAgricultural Engineering and Mechanization

Crop Processing and Chop Length of Corn Silage: Effects on Intake, Digestion, and Milk Production by Dairy Cows

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Bal, M.A., Shaver, R.D., Jirovec, A.G., Shinners, K.J., Coors, J.G.·2000·Journal of Dairy Science
DOI 10.3168/jds.s0022-0302(00)74993-9
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Abstract

Effects of corn silage crop processing and chop length on intake, digestion, and milk production were evaluated. Corn silage treatments were harvested at one-half milkline stage of maturity (65% whole-plant moisture content) and at 0.95-cm theoretical length of cut without processing (control) or 0.95-, 1.45-, or 1.90-cm theoretical length of cut with processing at a 1-mm roll clearance. Twenty-four multiparous Holstein cows averaging 71 d in milk at trial initiation were in a replicated 4 x 4 Latin square design with 28-d periods; one square was comprised of ruminally cannulated cows for rumen measurements. Corn silage treatments were fed in total mixed rations containing 50% forage (67% corn silage and 33% alfalfa silage) and 50% corn and soybean meal based concentrate (dry matter basis). Dry matter intake (25.9 vs. 25.3 kg/d) and milk (46.0 vs. 44.8 kg/ d) and fat (1.42 vs. 1.35 kg/d) yields were higher for the processed corn silage treatments compared with the control corn silage. Within the processed corn silage treatments, there were no chop length effects on intake, milk production, or milk composition. Chewing activity was not different among the four corn silage treatments averaging 12 h/d. Total tract digestion of dietary starch was lower for control corn silage (95.1%) compared with fine, medium, and coarse processed corn silage treatments, which averaged 99.3%. Total tract digestion of dietary NDF was reduced for fine-processed corn silage compared with control corn silage and coarse-processed corn silage (28.4% vs. 33.9 and 33.7%, respectively). Processing corn silage improved dry matter intake, starch digestion, and lactation performance. Under the conditions of this study and with theoretical lengths of cut ranging from 0.95 to 1.90 cm, length of chop effects were minimal in processed corn silage.

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  1. [23]23. SAS User's Guide: Statistics, Version 7 Edition. 1998. SAS Inst., Inc., Cary, NC.
  2. [24]24. Satter, L. D., Z. Wu, V. R. Moreira, M. A. Bal, and R. D. Shaver. 1999. Processing corn silage. Page 49-58 in Proc. of the 24th Annual Minnesota Forage Conf., American. Forage and Grass- land Council, Rochester, MN.

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Authors
Bal, M. A., Shaver, R. D., Jirovec, A. G., Shinners, K. J., & Coors, J. G.
Affiliations
University of Wisconsin–Madison (US)
ORCID
Venue
Journal of Dairy Science
Publisher
American Dairy Science Association
Published
2000-06
Volume
83
Issue
6
Pages
1264-1273
ISSN
0022-0302 (ISSN-L)
DOI
10.3168/jds.s0022-0302(00)74993-9
OpenAlex
W2106148986
Semantic Scholar
d7c72d57d66e095bab28f2518cdc56ed67532208
Cited by
240
References
25
Citations by year
2026: 4 · 2025: 3 · 2024: 7 · 2023: 14 · 2022: 15 · 2021: 11 · 2020: 14 · 2019: 15 · 2018: 6 · 2017: 13 · 2016: 9 · 2015: 9 · 2014: 13 · 2013: 5 · 2012: 10
FWCI
26.85
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of Dairy 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, crop processing, chop length, dairy cattle, dry matter intake, starch hydrolysis, milk production, milk fat yield, mastication, rumen fermentation, Holstein cows, alfalfa silage
MeSH terms
Medicago sativa, Animals, Body Weight, Cattle, Zea mays, Digestion, Eating, Female, Fermentation, Food Handling, Lactation, Mastication, Milk, Particle Size, Rumen, Silage

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