Home About Browse Search

Gas emissions from dairy cow and fattening pig buildings

effects of animal parameters, climatic factors and manure management on methane and ammonia missions

Ngwabie, Ngwa Martin (2011). Gas emissions from dairy cow and fattening pig buildings. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2011:18
ISBN 91-576-7553-8
[Doctoral thesis]

[img] PDF


The objective of this research is to contribute to the knowledge concerning the abatement of gas emissions from livestock production. Investigations regarding the choice of sampling locations for gas concentration measurements, quantification of gas emissions and the factors that affect gas emissions were conducted. NH₃, CH₄, CO₂ and N₂O emissions were measured from two naturally ventilated buildings for dairy cows and from a mechanically ventilated building for fattening pigs. Animal activity, temperature and humidity were also measured. Gas and odour emissions from manure samples with and without the addition of wood shavings were measured in a flux chamber at different air and manure temperatures. Significant differences existed in the mean concentrations of all the gases at various indoor sampling locations in a naturally ventilated building for dairy cows. The differences in gas concentrations between various sampling locations were much smaller for long-term, relative to short-term, measurements, suggesting that a single sampling location during long-term measurements may generate representative data. Decreasing daily animal activity was associated with increasing pig weight, and with increasing air temperatures for the cows. Diurnal variations in gas emissions were related to feeding/cleaning routines and to animal activity. Daily emissions from the pig building increased with pig weight and temperature. Air temperature was more important than cow activity for daily NH₃ emissions while cow activity was more important than air temperatures for daily CH₄ emissions. Reducing manure temperatures and increasing manure carbon-to-nitrogen ratio are potential NH₃ abatement techniques. However, low air temperatures may increase cow activity which may in turn increase CH₄ emissions. Increasing the frequency of manure removal from the floor and from animal buildings reduces indoor emissions of most gases. Low N₂O emissions were measured from the buildings in this study; hence the use of liquid manure systems might reduce N₂O emissions.

Authors/Creators:Ngwabie, Ngwa Martin
Title:Gas emissions from dairy cow and fattening pig buildings
Subtitle:effects of animal parameters, climatic factors and manure management on methane and ammonia missions
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2011
Number of Pages:74
ALLI: N. M. Ngwabie, K.-H. Jeppsson, S. Nimmermark, C. Swensson, G. Gustafsson (2009). Multi-location measurements of greenhouse gases and emission rates of methane and ammonia from a naturally ventilated barn for dairy cows. Biosystems Engineering. 103, 68-77. II: N. M. Ngwabie, K.-H. Jeppsson, G. Gustafsson, S. Nimmermark (2011). Effects of Animal Activity and Air temperature on Methane and Ammonia Emissions from a Building for Dairy Cows. (Submitted). III: N. M. Ngwabie, K.-H. Jeppsson, S. Nimmermark, G. Gustafsson (2010). Effects of Animal and Climate Parameters on Gas Emissions from a Barn for Fattening Pigs. (Submitted). IV: Ngwabie N M, K.-H. Jeppsson, G. Gustafsson, S. Nimmermark (2010). Influence of climatic factors and the addition of wood shavings on ammonia and odour emissions from fresh livestock manure. Agricultural Engineering International: CIGR Journal. Manuscript 1660. Vol. 12, No.3.
Place of Publication:Alnarp
ISBN for printed version:91-576-7553-8
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L01 Animal husbandry
Subjects:Not in use, please see Agris categories
Agrovoc terms:animal housing, dairy cows, swine, methane emissions, ammonia, sampling, measurement
Keywords:Livestock buildings, Sampling location, Greenhouse gases, Ammonia, Environmental quality, Daily variations, Diurnal variations, Manure management, Animal activity, Temperature
Permanent URL:
ID Code:2443
Department:(LTJ, LTV) > Rural Buildings and Animal Husbandry (until 121231)
Deposited By: Martin Ngwabie Ngwa
Deposited On:24 Feb 2011 00:00
Metadata Last Modified:02 Dec 2014 10:18

Repository Staff Only: item control page


Downloads per year (since September 2012)

View more statistics