How the mass and quality of wheat and vetch mulches affect drivers of soil N2O emissions
作者： Raquel Schmatz , Sylvie Recous , Douglas Adams Weiler , Getúlio Elias Pilecco , Adriane Luiza Schu
DOI: 10.1016/J.GEODERMA.2020.114395
关键词: Carbon dioxide 、 Environmental science 、 Denitrification 、 Moisture 、 Water content 、 Mulch 、 Agronomy 、 Crop residue 、 Carbon 、 Nitrogen 、 Soil science
摘要: Abstract Crop residue affects nitrous oxide (N2O) emissions in no-tillage systems, but the magnitude of depends on soil drivers that are directly influenced by crop quality and quantity. We conducted a one-year study to investigate how mulch chemical characteristics mass affect N2O during their decomposition field under subtropical conditions. The treatments consisted vetch wheat residues applied at quantities 0, 3, 6 9 Mg ha−1 dry matter. followed kinetics carbon (C) nitrogen (N), temperature, moisture inorganic N, denitrification end-product ratio [N2O/(N2O + N2)] days 15 30, dioxide (CO2) with static chamber method. Mulch C N dynamics were very rapid for much more gradual wheat, reflecting differences initial compositions, both residues, had no effect rate. presence mulches increased 0–10 cm layer, results water-filled pore space treatment as 0 = 3
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