eprintid: 11463
rev_number: 14
eprint_status: archive
userid: 3170
dir: disk0/00/01/14/63
datestamp: 2020-04-08 08:20:40
lastmod: 2020-04-08 08:20:40
status_changed: 2020-04-08 08:20:40
type: article
metadata_visibility: show
creators_name: Worou, O N
creators_name: Tondoh, J E
creators_name: Koné, A W
creators_name: Gaiser, T
creators_name: Guéi, A M
creators_name: Edoukou, F E
icrisatcreators_name: Worou, O N
affiliation: ICRISAT (Bamako)
affiliation: West African Science Service Center on Climate Change and Adapted Land Use (WASCAL),Burkina Faso
affiliation: UFR des Sciences de la Nature/Centre de Recherche en Ecologie, Université Nangui Abrogoua, Côte d’Ivoire
affiliation: Institute of Crop Science and Resource Conservation, University of Bonn, Bonn, Germany
affiliation: UFR d’Agroforesterie/Centre de Recherche en Ecologie, Université Jean Lorougnon Guédé, Daloa, Côte d’Ivoire
affiliation: Centre de Recherche en Ecologie, Abidjan 08, Côte d’Ivoire
country: Mali
country: Burkina Faso
country: Côte d’Ivoire
country: Germany
title: Conventional versus agro-ecological intensification: assessing the effect of conservation agriculture in maize cropping systems with the DSSAT model in Côte d’Ivoire (West Africa)
ispublished: pub
subjects: CPM
subjects: S2020
subjects: s2.4
divisions: CRPS1
full_text_status: restricted
keywords: Conservation agriculture, Conventional intensification,  Climate variability, DSSAT model, West Africa
note: This paper was built on findings of projects promoting sustainable agricultural production through agro-ecology implemented in Côte d’Ivoire. They were financially supported by the International Foundation of Science (IFS), the French Ministry of Foreign Affairs, the Global Environment Facility (GEF), and the German Ministry of Education and Research (BMBF). The authors are thankful to their commitments to promoting sustainable agriculture in West Africa.
abstract: Integrated soil fertility management options are being promoted as ways of adapting agricultural systems to sustain yields on highly degraded and poor soils encountered throughout West Africa. The efficiency of these practices may be affected by high variability and uncertainty associated with seasonal rainfall, especially for areas such as Côte d’Ivoire, where intra-seasonal rainfall has been observed to change from 1 year to another. The DSSAT crop simulation model was used in this study as a tool to evaluate the impacts of soil improvement options including inorganic fertilizer and conservation agriculture generating higher carbon sequestration and crop yield in maize agro-ecosystems. The model was calibrated using agronomic data for three cropping seasons from 2009 to 2010 in Goulikao (Center-West Côte d’Ivoire) and Ahérémou 2 (Central Côte d’Ivoire), respectively and validated against independent datasets of yield of 2003–2004 seasons in the buffer zone of the Lamto Natural Reserve, Central Côte d’Ivoire. The model predicted average maize yields of 1454 kg ha−1 across the sites versus an observed average value of 1736 kg ha−1, R2 of 0.72, and RMSE of 597 kg ha−1 after the default values for stable soil organic matter fraction used in the model were substituted by the estimated one. For the validation, the predicted higher maize yield was consistently related to fallow biomass inputs and different rates of fertilizer, thus generating a RMSE of total aboveground biomass and grain yield of 606 kg ha−1 and 350 kg ha−1, respectively. The impact of fallow residues and cropping sequence on subsequent maize yield was simulated and compared with conventional fertilizer and control data using 12 years historic climate time series. We conclude that soil fertility improvements through conservation agriculture can sustain grain yield at the same level as conventional inputs of urea against larger climate variability. However, this system may be substituted by conventional agriculture when climate forecast reveals a dry cropping season year.
date: 2019-05
date_type: published
publication: Regional Environmental Change (TSI)
volume: 19
number: 6
publisher: Springer
pagerange: 1725-1736
id_number: doi:10.1007/s10113-019-01511-w
refereed: TRUE
issn: 1436-3798
official_url: https://doi.org/10.1007/s10113-019-01511-w
citation:   Worou, O N and Tondoh, J E and Koné, A W and Gaiser, T and Guéi, A M and Edoukou, F E  (2019) Conventional versus agro-ecological intensification: assessing the effect of conservation agriculture in maize cropping systems with the DSSAT model in Côte d’Ivoire (West Africa).  Regional Environmental Change (TSI), 19 (6).  pp. 1725-1736.  ISSN 1436-3798     
document_url: http://oar.icrisat.org/11463/1/s10113-019-01511-w_author_access_token%3DTmEEkjKRZ9kXwAqzrvAUK_e4RwlQNchNByi7wbcMAY5yOcoOX0WngCD_C6YX-AhiDggM-gGWR_IWrpn5G6MiGqb8L2h1AMwrychdo1KwWsgeAdaekRqTPObMdpB9-2WZRJqXh8AIL2rrRFsqy71J3Q%3D%3D