Cited by 236Ruminant Nutrition and Digestive PhysiologyCrop Yield and Soil FertilityAnimal Nutrition and Physiology

Impact of the Maturity of Corn for Use as Silage in the Diets of Dairy Cows on Intake, Digestion, and Milk Production

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Bal, M.A., Coors, J.G., Shaver, R.D.·1997·Journal of Dairy Science

Abstract

Whole-plant corn was harvested at early dent, quarter milkline, two-thirds milkline, and black layer stages to evaluate the effects of maturity on intake, digestion, and milk production when corn was fed as silage in the diet. Twenty multiparous Holstein cows were used in a replicated experiment with a 4 x 4 Latin square design with 28-d periods. Diets containing 50% forage (67% corn silage and 33% alfalfa silage) and 50% concentrate (dry matter basis) were fed as total mixed rations. Moisture contents were 69.9, 67.6, 64.9, and 58.0% for silages from corn harvested at early dent, quarter milkline, two-thirds milkline, and black layer stages, respectively. Intakes of dry matter were similar across the four treatments and ranged from 3.73 to 3.79% of body weight. Milk production was highest (33.4 kg/d) for cows fed silage from corn harvested at the two-thirds milkline stage and lowest (32.4 kg/d) for cows fed silage from corn harvested at the early dent stage. Milk protein production was highest for cows fed silage from corn harvested at the two-thirds milkline stage (1.17 vs. 1.12 to 1.13 kg/d). Apparent total tract digestion of dry matter, organic matter, crude protein, acid detergent fiber, and starch was lowest for cows fed silage from corn harvested at the black layer stage. Although starch intake was similar for cows fed silage from corn harvested at the two-thirds milkline stage and for cows fed silage from corn harvested at the black layer stage (9 kg/d), intake of digestible starch was 0.4 kg/d lower for cows fed silage from corn harvested at the black layer stage. The optimum stage for corn that was ensiled was two-thirds milkline with some flexibility between quarter and two-thirds milkline.

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  1. [15]15. Mahanna, B. 1995. Lessons learned (and questions raised) from feeding the 1993 and 1994 corn crops. Page 175 in Proc. Four-State Appl. Nutr. Manage. Conf., La Crosse, WI. Univ. Wisconsin Coop. Ext., Madison.
  2. [21]21. SAS ® User's Guide: Statistics, Version 5 Edition. 1985. SAS Inst., Inc., Cary, NC.

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Authors
Bal, M. A., Coors, J. G., & Shaver, R. D.
Affiliations
University of Wisconsin–Madison (US)
Venue
Journal of Dairy Science
Published
1997-10
Volume
80
Issue
10
Pages
2497-2503
ISSN
0022-0302 (ISSN-L)
OpenAlex
W2161110173
Cited by
236
References
25
Citations by year
2025: 4 · 2024: 6 · 2023: 9 · 2022: 10 · 2021: 4 · 2020: 10 · 2019: 10 · 2018: 7 · 2017: 6 · 2016: 9 · 2015: 15 · 2014: 15 · 2013: 10 · 2012: 11
FWCI
8.75
Type
journal article
Language
en
Open access
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
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
Keywords
corn maturity, corn silage, dairy cattle, milk production, milk protein, dry matter intake, nutrient digestibility, starch hydrolysis, Holstein cows, alfalfa silage, total mixed ration
MeSH terms
Animals, Animal Nutritional Physiological Phenomena, Cattle, Zea mays, Diet, Digestion, Eating, Female, Hydrogen-Ion Concentration, Lactation, Silage, Lactic Acid

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