Does incorporation of cowpea-maize residue mixes influence nitrous oxide emission and mineral nitrogen release in a tropical luvisol?

In the face of climate change, quantification of the emission of nitrous oxide from soils in relation to sufficient N availability for crop uptake has assumed much significance. This study used the 15 N stable isotope technique, under controlled laboratory conditions, to quantify the interactive eff...

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Bibliographic Details
Published in:Nutrient cycling in agroecosystems 2011-12, Vol.91 (3), p.281-292
Main Authors: Frimpong, K. A., Yawson, D. O., Baggs, E. M., Agyarko, Kofi
Format: Article
Language:English
Subjects:
Agricultural practices
Agriculture
Biomedical and Life Sciences
Climate change
Corn
Cowpeas
Crop residues
Emission
Emissions
Interactive control
Intercropping
Legumes
Life Sciences
Nitrogen
Nitrous oxide
Original Article
Stable isotopes
Vigna unguiculata
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Summary:In the face of climate change, quantification of the emission of nitrous oxide from soils in relation to sufficient N availability for crop uptake has assumed much significance. This study used the 15 N stable isotope technique, under controlled laboratory conditions, to quantify the interactive effect on and relative contributions of the component species to N 2 O emission and mineral N dynamics in a tropical luvisol incorporated with different rates of cowpea-maize residue mixtures. The results show that increasing the maize residue proportion in the mixture significantly decreases N 2 O emission compared to the sole cowpea incorporation but increases mineral N concentration compared to sole maize residue incorporation. It is concluded that mixing low C:N ratio cowpea residue with high C:N ratio maize residue has potential for N management in tropical legume-cereal intercropping systems with the view to minimizing N 2 O emission while making N available for crop uptake.
ISSN:1385-1314
1573-0867
DOI:10.1007/s10705-011-9461-1