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Permanent link (DOI): https://doi.org/10.7939/R3PH4R

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Effects of silage inoculants on silage fermentation, aerobic stability and animal performance Open Access

Descriptions

Other title
Subject/Keyword
corn
Barley
silage inoculant
beef steers
esterase-producing
digestibility
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Addah,Weseh
Supervisor and department
Okine, K. Erasmus (Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta)
Baah, John (Lethbridge Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta)
Examining committee member and department
Adegbola, Adesogan (Department of Animal Sciences, University of Florida)
McAllister, A. Timothy (Lethbridge Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta)
Gaenzle, Michael (Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta)
Okine, K. Erasmus (Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta)
Guan, Leluo (Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta)
Baah, John (Lethbridge Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta)
Swift, Mary Lou (Lethbridge Research Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta)
Oba, Masahito (Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization
Animal Science
Date accepted
2013-09-11T14:50:08Z
Graduation date
2013-11
Degree
Doctor of Philosophy
Degree level
Doctoral
Abstract
Ferulic acid constitutes a major constraint to ruminal fibre digestibility. The overall objective of this study was therefore to determine the effects of a first (non-fibrolytic) - or a third (ferulic acid esterase-producing) - generation inoculant on the fermentation characteristics, aerobic stability and nutritional value of silages. In experiment 1, barley and corn silages were inoculated with a first-generation inoculant containing Lactobacillus plantarum, Enterococcus faecium and Pediococcus acidilactici in a 2 × 2 factorial design. Inoculation induced a more homolactic fermentation in barley than in corn silage but did not improve aerobic stability, DM intake, in situ digestibility or growth performance of growing feedlot steers. Aerobic stability of barley silage, and DM intake and growth performance of steers fed barley silage were improved as compared to corn silage. In experiments 2 and 3, barley silage was inoculated with a third-generation inoculant containing ferulic acid esterase-producing Lactobacillus buchneri in combination with Lactobacillus plantarum and Lactobacillus casei. The inoculated silages had higher concentrations of acetic acid and were more aerobically stable than uninoculated silage. Inoculation increased in situ fibre digestibility (experiment 2) and feed efficiency for growing feedlot steers (experiment 3). In the final experiment (experiment 4), barley silage was chopped to a theoretical chop length (TLC) of approximately 1.0 (SC) or 2.0 cm (LC) and inoculated without or with the same inoculant used in experiments 2 and 3 in a 2 × 2 factorial design. Inoculation increased the concentration of acetic acid in the LC silage and improved its aerobic stability, but decreased the concentration of acetic acid and had no effect on the aerobic stability SC silage. Growth performance of finishing feedlot steers were neither affected by TLC, inoculation nor their interactions, however, the proportion of saleable meat and rib eye area of steers was greater for SC than for LC. In conclusion, this study demonstrated that third-generation inoculants could be used to improve the nutritional value of barley silage. Third-generation inoculants could also allow TLC to be increased from 1 to 2 cm without adverse effects on silage fermentation or quality.
Language
English
DOI
doi:10.7939/R3PH4R
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
. W. Addah, J. Baah, P. Groenewegen, E. K. Okine and T. A. McAllister. Can. J. Anim. Sci. 91: 133–146W. Addah, J. Baah, E. K. Okine and T. A. McAllister. 2012. Can. J. Anim. Sci. 92: 381–394.W. Addah, J. Baah, E. K. Okine and T. A. McAllister. J. Anim Sci. 90:1541–52

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