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Dynamics of gas formation during ensilage

Knicky, Martin and Wiberg, Hans-Gunnar and Eide, Fredrik and Gertzell, Bengt (2014). Dynamics of gas formation during ensilage. Uppsala.

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Abstract

The formation of a whole spectrum of gasses, which is undesirable occurs during ensiling process. The formation of gasses is undesirable, because it is often a sign of undesirable processes in silages, and causes concern about the impact on the global environment. Formation of CO2 is the most abundant. Besides CO2, the formation of toxic N oxides also occurs during ensiling. Since silage additive addition affects the fermentation pattern, the aim of the study was to monitor the formation of various gasses from silages treated with different silage additives. A grass ley (70% timothy) was harvested on August 24th 2013, nearby Helsingborg. Bacterial inoculant (E. faecium, L. plantarum, L. buchneri) at the rate of 250000 cfu/g FF, and silage additive Safesil at the rate of 3 L/ton FF were compared with untreated control. Gasses collected in bags were analysed for N2, H2, O2, CO, CH4 by gas chromatographaphy. CO2, NO, and NO2 were absorbed in water and analysed using ion chromatography. Standard analyses to determine silage quality were performed after ensiling period. Silages treated with bacterial inoculant had significantly higher pH, propionic acid, acetic acid, and ethanol contents but lower concentration of lactic acid than other silage treatments. Control and bacterially inoculated silages produced more gas than Safesil treated silages, mainly due to an increased proportion of CO2. The formation of NOx gases displayed no significant differences among other treatments.

Authors/Creators:Knicky, Martin and Wiberg, Hans-Gunnar and Eide, Fredrik and Gertzell, Bengt
Title:Dynamics of gas formation during ensilage
Series/Journal:Rapport / Sveriges lantbruksuniversitet, Institutionen för husdjurens utfodring och vård (0347-9838)
Year of publishing :2014
Number:290
Page range:41-46
Number of Pages:6
Place of Publication:Uppsala
Publisher:Department of Animal Nutrition & Management, Swedish University of Agricultural Sciences
ISSN:0347-9838
Language:English
Publication Type:Other
Article category:Other scientific
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
URN:NBN:urn:nbn:se:slu:epsilon-e-3070
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3070
ID Code:12704
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Animal Nutrition and Management
Deposited By: SLUpub Connector
Deposited On:25 Nov 2015 14:36
Metadata Last Modified:18 Feb 2016 07:05

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