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  Livelihood and climate trade-offs in Kenyan peri-urban vegetable production

Kurgat, B. K., Stöber, S., Mwonga, S., Lotze-Campen, H., Rosenstock, T. S. (2018): Livelihood and climate trade-offs in Kenyan peri-urban vegetable production. - Agricultural Systems, 160, 79-86.
https://doi.org/10.1016/j.agsy.2017.10.003

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Kurgat, B. K.1, Autor
Stöber, S.1, Autor
Mwonga, S.1, Autor
Lotze-Campen, Hermann2, Autor              
Rosenstock, T. S.1, Autor
Affiliations:
1External Organizations, ou_persistent22              
2Potsdam Institute for Climate Impact Research, ou_persistent13              

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 Zusammenfassung: Trade-offs between livelihood and environmental outcomes due to agricultural intensification in sub-Saharan Africa are uncertain. The present study measured yield, economic performance and nitrous oxide (N2O) emissions in African indigenous vegetable (AIV) production to investigate the optimal nutrient management strategies. In order to achieve this, an on-farm experiment with four treatments – (1) 40 kg N/ha diammonium phosphate (DAP), (2) 10 t/ha cattle manure, (3) 20 kg N/ha DAP and 5 t/ha cattle manure and (4) a no-N input control – was performed for two seasons. Yields and N2O emissions were directly measured with subsampling and static chambers/gas chromatography, respectively. Economic outcomes were estimated from semi-structured interviews (N = 12). Trade-offs were quantified by calculating N2O emissions intensity (N2OI) and N2O emissions economic intensity (N2OEI). The results indicate that, DAP alone resulted at least 14% greater yields, gross margin and returns to labour in absolute terms but had the highest emissions (p = 0.003). Productivity-climate trade-offs, expressed as N2OI, were statistically similar for DAP and mixed treatments. However, N2OEI was minimized under mixed management (p = 0.0004) while maintaining productivity and gross margins. We therefore conclude that soil fertility management strategies that mix inorganic and organic source present a pathway to sustainable intensification in AIV production. Future studies of GHG emissions in crop production need to consider not only productivity but economic performance when considering trade-offs.

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 Datum: 2018
 Publikationsstatus: Final veröffentlicht
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 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.agsy.2017.10.003
PIKDOMAIN: Climate Impacts & Vulnerabilities - Research Domain II
eDoc: 7751
Research topic keyword: Adaptation
Research topic keyword: Climate impacts
Research topic keyword: Food & Agriculture
Research topic keyword: Inequality and Equity
Regional keyword: Africa
Organisational keyword: RD2 - Climate Resilience
Working Group: Land Use and Resilience
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Titel: Agricultural Systems
Genre der Quelle: Zeitschrift, SCI, Scopus
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Seiten: - Band / Heft: 160 Artikelnummer: - Start- / Endseite: 79 - 86 Identifikator: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/agricultural-systems