Cited by 75Ruminant Nutrition and Digestive PhysiologyAnimal Nutrition and PhysiologyAgricultural Engineering and Mechanization

Factors influencing the response in intake of silage and animal performance after wilting of grass before ensiling: A review

Wright, Gordon, Steen, Patterson·2000·Grass and Forage Science

Abstract

This review examines the response in intake of silage and animal performance after wilting of grass before ensiling. It uses data from eighty‐five published comparisons. Initial analysis identified those variables having the greatest influence on the increase in dry‐matter (DM) intake of grass silage owing to wilting. Total water loss, drying rate of the wilted material and ammonia‐N concentration of the unwilted material were the variables most closely and positively correlated to the proportional increase in DM intake as a result of wilting, with r2 values of 0·344, 0·393 and 0·240 respectively. There was little evidence of curvilinearity in any of the relationships. Stepwise regression analysis was used to identify the best multiple linear regressions for predicting the proportional increase in intake owing to wilting. Factors associated with the extent and rate of water loss in the field (total water loss and drying rate) and the quality of the unwilted material ensiled and its subsequent fermentation pattern (DM digestibility, crude protein, ammonia‐N content of unwilted silage) were the key variables in the relationship. Subsequent analysis related the increase in output of milk energy of dairy cows and liveweight gain of beef cattle to the same independent variables. This indicated that variables shown to describe the response in DM intake in the previous analysis were among those most closely related to the increases in animal performance owing to wilting of grass. To assess whether the increase in animal performance owing to wilting could be explained as a direct response to increased metabolizable energy (ME) intake of wilted compared with unwilted silages, linear relationships were derived between the increase in milk and beef production parameters and the increase in ME intake owing to wilting. From these, it was concluded that there was no clear evidence that wilting reduced the efficiency of utilization of ME in beef or dairy cattle. The present study showed that the increase in milk energy output (measured in MJ) per increase in ME intake (measured in MJ) owing to wilting was linear, with a slope of 0·19. This response from additional ME intake owing to wilting is in line with what would be anticipated when increasing ME intake by other methods.

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Crossref · 10.1046/j.1365-2494.2000.00198.x

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Authors
Wright, Gordon, Steen, & Patterson
Affiliations
Queen's University Belfast (GB)
Corresponding author
Wright
Venue
Grass and Forage Science
Publisher
Wiley
Published
2000-03
Volume
55
Issue
1
Pages
1-13
ISSN
  • 0142-5242 (ISSN-L)
  • 1365-2494
OpenAlex
W1562292809
Cited by
75
References
36
Citations by year
2025: 1 · 2024: 4 · 2023: 4 · 2022: 6 · 2021: 2 · 2020: 3 · 2019: 2 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 2 · 2014: 2 · 2013: 1 · 2012: 3
FWCI
1.41
Type
journal article
Language
en
Open access
closed
Locations
Grass and Forage Science (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
  • Physical Sciences › Engineering › Mechanical Engineering › Agricultural Engineering and Mechanization
Keywords
grass silage, dry matter intake, animal performance, dairy cattle, beef cattle, milk energy output, liveweight gain, ammonia-N, silage fermentation, water loss, drying rate, silage quality

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