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Published online 29 March 2006
Published in Soil Sci Soc Am J 70:744-752 (2006)
DOI: 10.2136/sssaj2005.0242
© 2006 Soil Science Society of America
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In situ Mineralization of Dairy Cattle Manures as Determined using Soil-Surface Carbon Dioxide Fluxes

Philippe Rochette*, Denis A. Angers, Martin H. Chantigny, Bernard Gagnon and Normand Bertrand

Agriculture and Agri-Food Canada, 2560, Hochelaga Blvd., Sainte-Foy, QC, Canada, G1V 2J3


Figure 1
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  		Fig. 1. Soil CO2 concentration at 5 cm, soil-surface CO2 flux and cumulated mineralized manure C in a clay soil. Arrows indicate dates of manure application. Error bars represent LSD0.05 for treatment comparison at each date.

 

Figure 2
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  		Fig. 2. Soil CO2 concentration at 5 cm, soil-surface CO2 flux and cumulated mineralized manure C in a loamy soil. Arrows indicate dates of manure application. Error bars represent LSD0.05 for treatment comparison at each date.

 

Figure 3
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  		Fig. 3. Soil temperature at 5 and 20 cm in a clay and a loamy soils at the time of CO2 flux measurements (9 to 12 EST). Arrows indicate dates of manure application.

 

Figure 4
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  		Fig. 4. Soil water content in the 0- to 10- and 15- to 25-cm soil layers in a clay and a loamy soils at the time of CO2 flux measurements (9 to 12 EST). Arrows indicate dates of manure application.

 

Figure 5
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  		Fig. 5. Fraction of soil aggregates >2 mm and soil microbial biomass C in the top 15 cm of a clay and a loamy soils. Values are means of values (n = 16) obtained at four sampling dates during the experiment. Different letters indicate significant differences (p < 0.05) according to LSD test.

 




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