GREENHOUSE GAS EMISSIONS FROM AN ALKALINE SALINE SOIL CULTIVATED WITH MAIZE (ZEA MAYS L.) AND AMENDED WITH ANAEROBICALLY DIGESTED COW MANURE: A GREENHOUSE EXPERIMENT |
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| Authors: | J. Juárez-Rodríguez F. Fernández-Luqueño E. Conde V. Reyes-Varela F. Cervantes-Santiago E. Botello-Alvarez |
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| Affiliation: | 1. Laboratory of Bioengineering, Department of Biochemical Engineering , Instituto Tecnológico de Celaya , Celaya , México;2. Laboratory of Soil Ecology, Department of Biotechnology and Bioengineering , Cinvestav , Mexico City , Mexico;3. Laboratory of Bioengineering, Department of Environmental Engineering , Technological Institute of Celaya , Celaya , México |
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| Abstract: | Sludge derived from cow manure anaerobically digested to produce biogas (methane; CH4) was applied to maize (Zea mays L.) cultivated in a nutrient-low, alkaline, saline soil with electrolytic conductivity 9.4 dS m?1 and pH 9.3. Carbon dioxide (CO2) emission increased 3.1 times when sludge was applied to soil, 1.6 times when cultivated with maize and 3.5 times in sludge-amended maize cultivated soil compared to the unamended uncultivated soil (1.51 mg C kg?1 soil day?1). Nitrous oxide (N2O) emission from unamended soil was -0.0004 μg nitrogen (N) kg?1 soil day?1 and similar from soil cultivated with maize (0.27 μg N kg?1 soil day?1). Application of sludge increased the N2O emission to 4.59 μg N kg?1 soil day?1, but cultivating this soil reduced it to 2.42 μg N kg?1 soil day?1. It was found that application of anaerobic digested cow manure stimulated maize development in an alkaline saline soil and increased emissions of CO2 and N2O. |
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| Keywords: | concentrations of NH+ 4 NO? 2 and NO? 3 emission of CO2 and N2O plant development pH and electrolytic conductivity in soil |
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