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MITIGATION OF METHANE AND NITROUS OXIDE EMISSIONS FROM FLOOD-IRRIGATED RICE BY NO INCORPORATION OF WINTER CROP RESIDUES INTO THE SOIL

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Academic year: 2019

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Figure 2b).  However, the type of crop residue had no effect on total CH 4  emission for the period, as the mean values (incorporated and on surface) were 236 and 230 g m -2  CH 4  for ryegrass and serradella, respectively (Figure 2b)
Figure 3. Concentration of nitrate (NO 3 - ), manganese (Mn 2+ ) and iron (Fe 2+ ) in the solution of a flooded Albaqualf at depth of 2 (a, b, c,) and 20 cm (d, e, f) affected by the residue management (incorporated or left on the soil surface) of ryegrass
Figure 4. Concentration of dissolved organic carbon at depths of 2 and 20 cm (a and c, respectively) in a flooded Albaqualf under residue managements (incorporated or left on the soil surface) of ryegrass and serradella, and its relationship with CH 4  emi
Figure 5. Relationship  between  CH 4  soil emission rates and air temperature within the chamber.
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