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Carbon, Nitrogen Balances and Greenhouse Gas Emission during Cattle Feedlot Manure Composting

Xiying Hao*, Chi Chang and Francis J. Larney

Agriculture and Agri-Food Canada, Lethbridge Research Centre, P.O. Box 3000, Lethbridge, AB, Canada T1J 4B1



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Fig. 1. Changes in (a) total carbon (TC), (b) total nitrogen (TN), (c) NH4–N, and (d) NO3–N during composting of straw-bedded manure (SBM) and wood chip–bedded manure (WBM). Vertical bars are standard errors, while vertical arrows on the x axis indicate windrow turning dates.

 


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Fig. 2. The rates of (a) oxygen (O2) consumption, (b) carbon dioxide (CO2), (c) methane (CH4), and (d) nitrous oxide (N2O) emission during composting of straw-bedded manure (SBM) and wood chip–bedded manure (WBM). Vertical bars are standard errors, while vertical arrows on the x axis indicate windrow turning dates.

 





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