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Cited by 35Ruminant Nutrition and Digestive PhysiologyCrop Yield and Soil FertilityAgricultural Engineering and Mechanization

Effect of length of cut and kernel processing on use of corn silage by lactating dairy cows

Open access
Cooke, K.M., Bernard, J.K.·2005·Journal of Dairy Science
DOI 10.3168/jds.s0022-0302(05)72689-8
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Abstract

Forty Holstein cows were used in an 8-wk randomized block design trial to determine the effects of theoretical length of cut (TLC) and kernel processing (KP) of whole plant corn silage on nutrient intake and digestibility, milk yield, and milk composition. Corn was harvested at three-quarters milk line stage of maturity at TLC of 1.90 or 2.54 cm. At each TLC, corn was KP at either 2 or 8 mm roll clearance. The control was harvested at 1.90 cm without KP. Corn silage provided 38% of the dietary dry matter (DM) in the experimental diets. Intake of DM and nutrients was similar among treatments. Apparent digestibility of DM and acid detergent fiber (ADF) increased with increasing TLC. Fiber digestibility was improved by KP compared with unprocessed corn silage. Starch digestibility was greater for corn silage KP at 2 vs. 8 mm. Apparent digestibility of DM, crude protein, and ADF was lowest for the diet containing silage harvested at 2.54 cm TLC and KP at 8 mm, resulting in an interaction of TLC and KP. No differences were observed in DM intake (DMI) among treatments. An interaction of TLC and KP was observed, however, for yield of milk protein and energy-corrected milk (ECM) and efficiency of converting DMI to ECM because of lower yield for diets containing silage harvested at 2.54 cm TLC and KP at 8 mm. Results of this trial indicate that as TLC increases, aggressive KP is necessary to maintain nutrient digestibility and performance of lactating dairy cows.

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  • Particle size reduction of the kernel fraction of the corn plant has been shown to improve feeding and storage characteristics along with milk production.

    “Particle size reduction of the kernel fraction of the corn plant has been shown to improve feeding and storage characteristics along with milk production (Shinners et al., 2000;Johnson et al., 2002a,b;Cooke and Bernard, 2005;Shinners and Holmes, 2013).”

    From Silage review: Recent advances and future technologies for whole-plant and fractionated corn silage harvesting (2018) · cites this paper as Cooke and Bernard, 2005

    The Intake and Digestibility section reports better fiber digestion with kernel processing and greater starch digestibility with more aggressive processing. Production Response reports higher milk yields for one processed-silage treatment than another, but the response depended on length of cut. The paper does not establish improved storage characteristics; its silage-characteristics discussion instead reports a tendency toward higher pH and lower lactic acid in processed silage. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

  • Particle size of processed whole-plant corn silage harvested with longer theoretical length of cut settings was similar to unprocessed silages in some but not all studies.

    “In addition, particle size of processed WPCS harvested with longer TLOC settings was similar to unprocessed silages in some (Dhiman et al., 2000, trial 2;Schwab et al., 2002;Cooke and Bernard, 2005) but not all (Bal et al., 2000a;Dhiman et al., 2000, trial 3;Weiss and Wyatt, 2000) studies.”

    From Silage review: Recent advances and future technologies for whole-plant and fractionated corn silage harvesting (2018) · cites this paper as Cooke and Bernard, 2005

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Research works printed but not linked: 2

  1. [24]24. SAS User's Guide: Statistics, Version 6 Edition, 1989. SAS Inst., Inc., Cary, NC.
  2. [25]25. Savoie, P. 1997. Kernel processing: History and engineering. Pages 85-94 in Proc. Silage: Field to Feedbunk. NRAES-99, NE Region Agric. Eng. Service, Ithaca, NY.

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Authors
Cooke, K. M., & Bernard, J. K.
Affiliations
University of Georgia (US)
Corresponding author
Bernard, J.K.
ORCID
Bernard, J.K.
Venue
Journal of Dairy Science
Publisher
American Dairy Science Association
Published
2005-01
Volume
88
Issue
1
Pages
310-316
ISSN
0022-0302 (ISSN-L)
DOI
10.3168/jds.s0022-0302(05)72689-8
OpenAlex
W2005486973
Cited by
35
References
24
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 1 · 2020: 4 · 2019: 2 · 2018: 4 · 2016: 3 · 2013: 1 · 2012: 2
FWCI
2.00
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, lactating dairy cows, nutrient intake, nutrient digestibility, acid detergent fiber, starch digestibility, milk yield, energy-corrected milk, Holstein cows, silage maturity
MeSH terms
Animals, Cattle, Zea mays, Dairying, Dietary Fiber, Digestion, Female, Food Handling, Lactation, Milk, Parity, Silage, Starch

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