Coffea Arabica water use in open versus shaded systems under smallholder's farm conditions in Eastern Uganda

Sarmiento-Soler Alejandra, Vaast Philippe, Hoffmann Munir P., Rötter Reimund P., Jassogne Laurence, Van Asten Piet J.A., Graefe Sophie. 2019. Coffea Arabica water use in open versus shaded systems under smallholder's farm conditions in Eastern Uganda. In : 27th Biennial ASIC Conference, Portland, 16-20 September 2018. Book of abstracts 2019. ASIC, SCA. Portland : ASIC, Résumé, 1 p. Biennial ASIC Conference. 27, Portland, États-Unis, 16 Septembre 2018/20 Septembre 2018.

Résumé : METHODS We monitored coffee water use (I day- 1) and certain microclimate parameters (rainfall, temperature, relative humidity, radiation and soil moisture) during one year (March 2015 - April 2016) in coffeeopen systems and coffee-shade systems at Mt. Elgon, Uganda. RESULTS Coffee daily water use per plant (1 .2 ± 0.64 1 d-1) and coffee transpiration per leaf area (0.30 ± 0.15 mm day- 1) did not differ significantly between cultivation systems. Neverthelees, system transpiration was on average higher in shaded systems (0.63 ± 0.25 mm d-1) than in open systems (0.27 ± 0.1 mm d- 1). Consequently soii water content was reduced in shaded systems up to SO%. CONCLUSIONS & PERSPECTIVES Coffee water use was not affected by the presence of shade trees. Hence, we could not prove water competition or complementarity between coffee and shade trees. Further research is needed to quantify water limitations under more extreme environmental conditions and the verstatility of several management practices (mulching, pruning, thinning) to reduce water limitations.

Mots-clés Agrovoc : Coffea arabica, adaptation aux changements climatiques, arbre d'ombrage, évapotranspiration, besoin en eau, microclimat, petite exploitation agricole

Mots-clés géographiques Agrovoc : Ouganda

Classification Agris : F08 - Systèmes et modes de culture
K10 - Production forestière
F60 - Physiologie et biochimie végétale
P40 - Météorologie et climatologie

Auteurs et affiliations

• Sarmiento-Soler Alejandra, Georg-August University of Göttingen (DEU)
• Vaast Philippe, CIRAD-PERSYST-UMR Eco&Sols (FRA)
• Hoffmann Munir P., Georg-August University of Göttingen (DEU)
• Rötter Reimund P., Georg-August University of Göttingen (DEU)
• Jassogne Laurence, IITA (UGA)
• Van Asten Piet J.A., IITA (UGA)
• Graefe Sophie, Georg-August University of Göttingen (DEU)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/593463/)

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