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Published online 25 January 2007
Published in J Environ Qual 36:440-447 (2007)
DOI: 10.2134/jeq2006.0222
© 2007 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Factors Influencing the Concentration of Volatile Fatty Acids, Ammonia, and Other Nutrients in Stored Liquid Pig Manure

Kenneth L. Conn*, Edward Topp and George Lazarovits

Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, Ontario, Canada N5V 4T3


Figure 1
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  		Fig. 1. Principal components analysis (PCA) plot of various pig operation manure chemistry. Values in parentheses indicate the contribution of the first principal component (PC1) or the second principal component (PC2) to the total variation in the chemistry of manure collected from storage tanks. Thus, 86% of the variability in the data could be explained by the type of pig operation. Circles were drawn to facilitate elucidation of the patterns. Pig operations were sow ({circ}), finishing ({square}), or mixed (sow, weaner, and finishing) ({blacktriangleup}).

 

Figure 2
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  		Fig. 2. Relationship between volatile fatty acid (VFA), ammonium (NH4+) plus ammonia (NH3), and pH of manure (n = 72). Pig operations were sow ({circ}), finishing ({square}), or mixed (sow, weaner, and finishing) ({blacktriangleup}).

 




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