GREENHOUSE GAS EMISSIONS FROM AN ALKALINE SALINE SOIL CULTIVATED WITH MAIZE (ZEA MAYS L.) AND AMENDED WITH ANAEROBICALLY DIGESTED COW MANURE: A GREENHOUSE EXPERIMENT

摘要

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.View full textDownload full textKeywordsconcentrations of NH+ 4 , NO− 2 and NO− 3 , emission of CO2 and N2O, plant development, pH and electrolytic conductivity in soilRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/01904167.2012.644371