Cited by 151Ruminant Nutrition and Digestive PhysiologyAnimal Nutrition and PhysiologyFood and Agricultural Sciences

Proteolysis During Ensilage of Forages Varying in Soluble Sugar Content

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Davies, D.R., Merry, R.J., Williams, A.P., Bakewell, E.L., Leemans, D.K., Tweed, J.K.S.·1998·Journal of Dairy Science

Abstract

The effect of contrasting concentrations of water-soluble carbohydrates of herbage on silage fermentation and composition was examined using grass with high [250 g/kg of dry matter (DM)] concentrations of water-soluble carbohydrates and grass and clover with low (66 g/kg of DM) concentrations of water-soluble carbohydrates. Herbages were ensiled untreated, after inoculation with lactic acid bacteria, or after treatment with formic acid. Good quality silages were produced from herbage with high concentrations of water-soluble carbohydrates, regardless of treatment, and all pH values were below 3.7 after 90 d of ensilage. However, the silage formed from inoculated herbage had a significantly lower concentration of ammonia N and a significantly higher proportion of residual ribulose-1,5-bisphosphate carboxylase compared with the other two silages. Fast protein liquid chromatography (Pharmacia, Uppsala, Sweden) was used to measure ribulose-1,5-bisphosphate carboxylase, and measurement of true plant protein fractions in herbage and silage showed benefits over traditional measurements such as the measurement of N and ammonia N. Herbages with low concentrations of water-soluble carbohydrates produced inferior quality silages that had lower ribulose-1,5-bisphosphate carboxylase contents and higher ammonia N contents, regardless of treatment; few significant differences were observed among treatments. Under good ensiling conditions, when available water-soluble carbohydrate is adequate, the use of inoculants can improve fermentation characteristics and increase the ribulose-1,5-bisphosphate carboxylase content of silages. However, when the herbage has low concentrations of water-soluble carbohydrates, even in inoculated herbages, lactic acid bacteria may follow a heterofermentative pathway instead of a homofermentative pathway, which can result in a decrease in silage quality and a reduction in intact ribulose-1,5-bisphosphate carboxylase.

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Research works printed but not linked: 4

  1. Mangan, J. L. 1982. The nitrogenous constituents of fresh forage. Pages 25-40 in Forage Protein in Ruminant Animal Production, B. Soc. Anim. Prod. Occass. Publ. No.
  2. Merry, R. J., R. F. Cussen-Mackenna, A. P. Williams, and J.K.S. Tweed. 1993. The effect of different inoculants on fermentation and proteolysis in silages of differing perennial ryegrass and white clover content. Page 83-84 in Proc. 10th Int. Conf. Silage Res. Sep. 6, 1993, Dublin, Ireland.
  3. Wilkinson, J. M., and K. K. Bolsen. 1996. Production of silage and hay in Europe and North America. Pages 42-43 in Proc. 11th Silage Conf., Univ. of Wales, Aberystwyth. Cambrian Printers, Aberystwyth, United Kingdom.
  4. Williams, A. P., J.K.S. Tweed, and J. E. Cockburn. 1990. A new approach to the measurement of proteolysis during ensilage. Pages 9-10 in Proc. 9th Silage Conf., Univ. Newcastle upon Tyne. Univ. Newcastle upon Tyne, United Kingdom.

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Authors
Davies, D. R., Merry, R. J., Williams, A. P., Bakewell, E. L., Leemans, D. K., & Tweed, J. K. S.
Affiliations
Aberystwyth University (GB)
Venue
Journal of Dairy Science
Published
1998-02
Volume
81
Issue
2
Pages
444-453
ISSN
0022-0302 (ISSN-L)
OpenAlex
W2092544287
Cited by
151
References
30
Citations by year
2026: 4 · 2025: 3 · 2024: 7 · 2023: 8 · 2022: 6 · 2021: 9 · 2020: 5 · 2019: 17 · 2018: 5 · 2017: 10 · 2016: 6 · 2015: 5 · 2014: 5 · 2013: 3 · 2012: 6
FWCI
5.59
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 › Animal Science and Zoology › Animal Nutrition and Physiology
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Food and Agricultural Sciences
Keywords
silage fermentation, water-soluble carbohydrates, Rubisco, lactic acid bacteria inoculation, formic acid treatment, ammonia nitrogen, silage quality
MeSH terms
Ammonia, Carbohydrates, Chromatography, High Pressure Liquid, Poaceae, Hydrogen-Ion Concentration, Lactobacillus, Nitrogen, Endopeptidases, Plant Proteins, Ribulose-Bisphosphate Carboxylase, Silage, Solubility

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