KIT | KIT-Bibliothek | Impressum | Datenschutz

Closing maize yield gaps in sub-Saharan Africa will boost soil N$_{2}$O emissions

Leitner, S.; Pelster, D. E.; Werner, Christian; Merbold, L.; Baggs, E. M.; Mapanda, F.; Butterbach-Bahl, Klaus

Abstract:
In sub-Saharan Africa (SSA), the most important staple crop is maize; the production of which is dominated by smallholder farming systems using low external inputs (<10 kg N ha$^{−1}$) resulting in low crop yields and large yield gaps (difference between actual and potential yields). To assess increases in soil N$_{2}$O emissions when closing maize yield gaps by increased fertilizer use, we reviewed the literature, developed a relationship between yield gaps and soil N$_{2}$O emissions, and used it to scale across SSA. According to our analysis, N$_{2}$O emissions from maize production will increase from currently 255 to 1755 ± 226 Gg N$_{2}$O-N year$^{−1}$ (+589%) if existing maize yield gaps are closed by 75%, increasing total anthropogenic N$_{2}$O emissions for SSA by c. 50%.

Open Access Logo


Verlagsausgabe §
DOI: 10.5445/IR/1000125458
Veröffentlicht am 03.11.2020
Originalveröffentlichung
DOI: 10.1016/j.cosust.2020.08.018
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1877-3435, 1877-3443
KITopen-ID: 1000125458
Erschienen in Current opinion in environmental sustainability
Band 47
Seiten 95-105
Nachgewiesen in Scopus
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page