Cited by 24Ruminant Nutrition and Digestive PhysiologyCrop Yield and Soil FertilityAnimal Nutrition and Physiology

Performance of Lactating Dairy Cows Fed Silage from Corn of Varying Maturities

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St. Pierre, N.R., Bouchard, R., St. Laurent, G., Roy, G.L., Vinet, C.·1987·Journal of Dairy Science

Abstract

The deleterious effect of frost on corn harvested for silage was investigated with 30 lactating Holstein cows fed silages from corn harvested at the milk or dough stage, or after one, two, or five frosts. The fibrous components of the corn plant increased as maturity and dry matter content increased, whereas the mineral content tended to decrease. Dry matter intake and 4% fat-corrected milk increased as maturity of the silage increased up to the silage harvested after two frosts and then declined for the silage harvested after five frosts. Gross energy apparent digestibility decreased from 64.9% for milk stage silage to 60.6% for silage from corn harvested after five frosts. Partitioning of gross energy, nitrogen, calcium, phosphorus, potassium, and magnesium provided similar increasing trends in feed intake, utilization, and milk production from milk stage silage to that harvested after two frosts, then a decline of all measurements occurred with silage harvested after five frosts. Net energy for lactation was calculated for each silage from the observed digestible energy, from a regression equation used by the provincial feed evaluation laboratories, and from a recently published summative equation; the latter method appeared best.

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Crossref · 10.3168/jds.s0022-0302(87)79985-8

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  1. [4]4. Chase, L. E. 1979. Effect of high moisture feeds on feed intake and milk production in dairy cattle. Page 52 in Proc. 1979 Cornell Nutr. Conf., Cornell Univ., Ithaca, NY.

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Authors
St. Pierre, N. R., Bouchard, R., St. Laurent, G., Roy, G. L., & Vinet, C.
Affiliations
Agriculture and Agri-Food Canada (CA)
Venue
Journal of Dairy Science
Published
1987-01
Volume
70
Issue
1
Pages
108-115
ISSN
0022-0302 (ISSN-L)
OpenAlex
W1995005230
Cited by
24
References
18
Citations by year
2021: 2 · 2018: 1 · 2014: 1
FWCI
2.43
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 silage, silage maturity, lactating dairy cows, Holstein cows, dry matter intake, fat-corrected milk, energy digestibility, nutrient partitioning, net energy for lactation, mineral content, milk stage, dough stage
MeSH terms
Animals, Animal Feed, Cattle, Zea mays, Female, Lactation, Pregnancy, Silage

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