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Cited by 38Ruminant Nutrition and Digestive PhysiologyCrop Yield and Soil FertilityAnimal Nutrition and Physiology

Influence of Particle Size on the Effectiveness of the Fiber in Corn Silage

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Clark, P.W., Armentano, L.E.·1999·Journal of Dairy Science
DOI 10.3168/jds.s0022-0302(99)75270-7
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Abstract

This experiment evaluated the influence of particle size on the effectiveness of fiber in corn silage relative to that in hay crop, which consisted of mostly alfalfa silage. Fifteen multiparous Holstein cows were assigned to five treatments in each of 2 yr. The design was replicated but truncated 5 x 5 Latin squares with three 21-d periods in 1994 and four 21-d periods in 1995. The five diets (2-yr average, dry basis) were a basal, low fiber control with 12% neutral detergent fiber (NDF) from hay crop forage (60% of total diet NDF); a high fiber control with 22% NDF from hay crop forage (82% of total diet NDF); and three diets each containing 12% NDF from hay crop forage and 9% NDF from coarse corn silage, fine corn silage, or an equal mixture of the two. An increase in the forage content above the basal amount with either hay crop or corn silage increased rumination and total chewing time. No detectable differences in rumination, total chewing time, or milk fat concentration were detected among the corn silage diets. In yr 1, yield of milk components and dry matter intake were greater for cows fed the four low alfalfa diets, but there was no effect due to particle size of the corn silage. In yr 2, linear increases in milk, fat, and protein yields were observed as the mean particle size of the corn silage decreased. Reduction of corn silage particle size did not affect chewing behavior.

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  • In a recent study, an indirect comparison of 24 published studies and 106 treatment means showed no significant influence of length of cut on total-tract NDF digestibility, DMI, milk production and composition.

    “In a recent study, 73 an indirect comparison of 24 published studies and 106 treatment means showed no significant influence of LOC on the total-tract NDF digestibility, DMI, milk production and composition.”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [73]

    The Yr 1 and Yr 2 methods describe experiments with 15 cows each, not an indirect comparison of 24 studies and 106 treatment means. Results and Discussion states that digestibility was not measured and that chopping increased milk and milk-protein yields in yr 2, contrary to the claimed across-the-board absence of an effect. (LLM, conf=0.88)

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  • Total-tract NDF digestibility numerically decreased with increasing length of cut, with the highest value 465 g/kg at the lowest length of cut 0.48-0.64 cm and the lowest value 449 g/kg at the highest length of cut >3.2 cm.

    “The total-tract NDF digestibility numerically decreased with increasing LOC, with the highest value of 465 g kg -1 recorded with the lowest LOC (0.48-0.64 cm) and the lowest value 449 g kg -1 recorded with the highest LOC (>3.2 cm).”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [73]

    The Yr 1 methods and diets section compares coarse, medium, and fine corn silage, but the passages found do not report total-tract NDF digestibility. Searches for digestibility, 465 and 449 g/kg, and the stated lengths of cut found no matching results in our copy; its Results and Discussion instead reports chewing outcomes. (LLM, conf=0.76)

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  • The influence of length of cut of ensiled maize on total-tract digestibility of NDF is equivocal in the literature, with reports of similar or increased NDF digestibility with longer length of cut.

    “The influence of LOC of ensiled maize on the total-tract digestibility of NDF is equivocal in the literature, with reports of similar 62,73 -78 or increased 31,79,80 NDF digestibility, with longer LOC of ensiled maize.”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [73]

    The Results and Discussion state that digestibility was not measured in this experiment. The passages on coarse and fine corn silage report chewing activity and milk responses, not total-tract NDF digestibility. A search for NDF digestibility and total-tract digestibility found no passage establishing the claimed similar or increased digestibility with longer length of cut. (LLM, conf=0.79)

    Experimental — accuracy not yet measured

  • The influence of length of cut of ensiled maize on total-tract digestibility of NDF is equivocal in the literature, with reports of similar or increased NDF digestibility with longer length of cut.

    “The influence of LOC of ensiled maize on the total-tract digestibility of NDF is equivocal in the literature, with reports of similar 62,73 -78 or increased 31,79,80 NDF digestibility, with longer LOC of ensiled maize.”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [75]

    The Results and Discussion compare coarse and fine corn silage for chewing and milk outcomes, but do not report total-tract NDF digestibility by length of cut. A discussion of another study mentions reduced digestibility of fibrous components after rolling silage, which is not a comparison of the claimed lengths of cut. Searches for NDF digestibility, total-tract digestibility, and coarse-versus-fine silage found no passage establishing the attributed result. (LLM, conf=0.74)

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Authors
Clark, P. W., & Armentano, L. E.
Affiliations
  • University of Wisconsin–River Falls (US)
  • University of Wisconsin–Madison (US)
ORCID
Armentano, L.E.
Venue
Journal of Dairy Science
Publisher
American Dairy Science Association
Published
1999-03
Volume
82
Issue
3
Pages
581-588
ISSN
0022-0302 (ISSN-L)
DOI
10.3168/jds.s0022-0302(99)75270-7
OpenAlex
W4237871439
Semantic Scholar
665141f5ff6f4e6756b0f5732f022ed575e80b11
Cited by
38
References
21
Citations by year
2024: 2 · 2023: 1 · 2020: 1 · 2019: 1 · 2015: 3 · 2014: 3 · 2012: 3
FWCI
4.81
Type
journal article
Language
en
Open access
Licence
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
University of Wisconsin-Madison
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
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
Keywords
corn silage, particle size, fiber digestibility, neutral detergent fiber, Holstein cows, rumination, chewing time, milk yield, milk fat, milk protein, dry matter intake, alfalfa hay, dairy cattle nutrition
MeSH terms
Animals, Cattle, Zea mays, Detergents, Dietary Fiber, Female, Lactation, Lipids, Mastication, Milk, Milk Proteins, Particle Size, Rumen, Silage

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