Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana
In West Africa, Harmattan-induced atmospheric and soil droughts represent seasonally recurring hazards for Theobroma cacao L. agro-ecosystems. Under the influence of the Harmattan winds, precipitation is impaired and air humidity and temperature reach stressful levels. Climate change is causing an increase in temperature that will drive up the evaporative power of the atmosphere, risking to harshen both the soil and atmospheric stress. This would further threaten the viability of cacao cultivation in this region. To characterize the response of cacao trees to atmospheric and soil drought, we monitored two sub-plots, with and without irrigation, throughout one Harmattan season (November 2019 - March 2020) in the Eastern region in Ghana. For both treatments we recorded: sap flow velocity, photosynthetic active radiation (PAR) above and below the canopy, soil moisture, temperature, air humidity and daily precipitation. Leaf area index (LAI) was estimated from PAR measurements. To characterize drought responses of mature cocoa trees during the day and at the seasonal scale, we developed two boosted regression trees models (BRT) with the environmental variables measured. The atmospheric component of Harmattan-induced drought was found to affect the canopy to a similar extent as soil water stress, both causing a decline in LAI of 33%. This study confirmed the importance of soil drought but highlighted as well the crucial role of atmospheric drought for this species' transpiration control. Soil and atmospheric water stresses did not have a synergistic effect on transpiration under the studied conditions. The BRT models identified LAI as one of the most influential drivers for sap velocity, which, in turn was sensitive to the interactive effect of both atmospheric and soil drought. Our results highlight that not only reduced precipitation but also increasing atmospheric drought is likely to negatively impact on cacao production in West Africa under increasingly dry conditions imposed by the influence of the Harmattan winds.
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Format: | article biblioteca |
Language: | eng |
Subjects: | H50 - Troubles divers des plantes, F60 - Physiologie et biochimie végétale, physiologie végétale, réponse de la plante, vent, sécheresse, stress dû à la sécheresse, translocation, conditions météorologiques, évaluation de l'impact, Theobroma cacao, http://aims.fao.org/aos/agrovoc/c_25189, http://aims.fao.org/aos/agrovoc/c_25446, http://aims.fao.org/aos/agrovoc/c_8401, http://aims.fao.org/aos/agrovoc/c_2391, http://aims.fao.org/aos/agrovoc/c_24993, http://aims.fao.org/aos/agrovoc/c_7869, http://aims.fao.org/aos/agrovoc/c_29565, http://aims.fao.org/aos/agrovoc/c_37938, http://aims.fao.org/aos/agrovoc/c_7713, http://aims.fao.org/aos/agrovoc/c_3253, |
Online Access: | http://agritrop.cirad.fr/599769/ http://agritrop.cirad.fr/599769/1/1-s2.0-S0168192321003567-main.pdf |
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dig-cirad-fr-5997692024-01-29T03:54:22Z http://agritrop.cirad.fr/599769/ http://agritrop.cirad.fr/599769/ Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana. Della Sala Pietro, Cilas Christian, Gimeno Teresa E., Wohl Steven, Opoku Stephen Yaw, Găinuşă-Bogdan Alina, Ribeyre Fabienne. 2021. Agricultural and Forest Meteorology, 311:108670, 17 p.http://doi.org/10.1016/j.agrformet.2021.108670 <http://doi.org/10.1016/j.agrformet.2021.108670> Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana Della Sala, Pietro Cilas, Christian Gimeno, Teresa E. Wohl, Steven Opoku, Stephen Yaw Găinuşă-Bogdan, Alina Ribeyre, Fabienne eng 2021 Agricultural and Forest Meteorology H50 - Troubles divers des plantes F60 - Physiologie et biochimie végétale physiologie végétale réponse de la plante vent sécheresse stress dû à la sécheresse translocation conditions météorologiques évaluation de l'impact Theobroma cacao http://aims.fao.org/aos/agrovoc/c_25189 http://aims.fao.org/aos/agrovoc/c_25446 http://aims.fao.org/aos/agrovoc/c_8401 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_7869 http://aims.fao.org/aos/agrovoc/c_29565 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_7713 Ghana http://aims.fao.org/aos/agrovoc/c_3253 In West Africa, Harmattan-induced atmospheric and soil droughts represent seasonally recurring hazards for Theobroma cacao L. agro-ecosystems. Under the influence of the Harmattan winds, precipitation is impaired and air humidity and temperature reach stressful levels. Climate change is causing an increase in temperature that will drive up the evaporative power of the atmosphere, risking to harshen both the soil and atmospheric stress. This would further threaten the viability of cacao cultivation in this region. To characterize the response of cacao trees to atmospheric and soil drought, we monitored two sub-plots, with and without irrigation, throughout one Harmattan season (November 2019 - March 2020) in the Eastern region in Ghana. For both treatments we recorded: sap flow velocity, photosynthetic active radiation (PAR) above and below the canopy, soil moisture, temperature, air humidity and daily precipitation. Leaf area index (LAI) was estimated from PAR measurements. To characterize drought responses of mature cocoa trees during the day and at the seasonal scale, we developed two boosted regression trees models (BRT) with the environmental variables measured. The atmospheric component of Harmattan-induced drought was found to affect the canopy to a similar extent as soil water stress, both causing a decline in LAI of 33%. This study confirmed the importance of soil drought but highlighted as well the crucial role of atmospheric drought for this species' transpiration control. Soil and atmospheric water stresses did not have a synergistic effect on transpiration under the studied conditions. The BRT models identified LAI as one of the most influential drivers for sap velocity, which, in turn was sensitive to the interactive effect of both atmospheric and soil drought. Our results highlight that not only reduced precipitation but also increasing atmospheric drought is likely to negatively impact on cacao production in West Africa under increasingly dry conditions imposed by the influence of the Harmattan winds. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/599769/1/1-s2.0-S0168192321003567-main.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html http://doi.org/10.1016/j.agrformet.2021.108670 10.1016/j.agrformet.2021.108670 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.agrformet.2021.108670 info:eu-repo/semantics/altIdentifier/purl/http://doi.org/10.1016/j.agrformet.2021.108670 |
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H50 - Troubles divers des plantes F60 - Physiologie et biochimie végétale physiologie végétale réponse de la plante vent sécheresse stress dû à la sécheresse translocation conditions météorologiques évaluation de l'impact Theobroma cacao http://aims.fao.org/aos/agrovoc/c_25189 http://aims.fao.org/aos/agrovoc/c_25446 http://aims.fao.org/aos/agrovoc/c_8401 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_7869 http://aims.fao.org/aos/agrovoc/c_29565 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_3253 H50 - Troubles divers des plantes F60 - Physiologie et biochimie végétale physiologie végétale réponse de la plante vent sécheresse stress dû à la sécheresse translocation conditions météorologiques évaluation de l'impact Theobroma cacao http://aims.fao.org/aos/agrovoc/c_25189 http://aims.fao.org/aos/agrovoc/c_25446 http://aims.fao.org/aos/agrovoc/c_8401 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_7869 http://aims.fao.org/aos/agrovoc/c_29565 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_3253 |
spellingShingle |
H50 - Troubles divers des plantes F60 - Physiologie et biochimie végétale physiologie végétale réponse de la plante vent sécheresse stress dû à la sécheresse translocation conditions météorologiques évaluation de l'impact Theobroma cacao http://aims.fao.org/aos/agrovoc/c_25189 http://aims.fao.org/aos/agrovoc/c_25446 http://aims.fao.org/aos/agrovoc/c_8401 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_7869 http://aims.fao.org/aos/agrovoc/c_29565 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_3253 H50 - Troubles divers des plantes F60 - Physiologie et biochimie végétale physiologie végétale réponse de la plante vent sécheresse stress dû à la sécheresse translocation conditions météorologiques évaluation de l'impact Theobroma cacao http://aims.fao.org/aos/agrovoc/c_25189 http://aims.fao.org/aos/agrovoc/c_25446 http://aims.fao.org/aos/agrovoc/c_8401 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_7869 http://aims.fao.org/aos/agrovoc/c_29565 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_3253 Della Sala, Pietro Cilas, Christian Gimeno, Teresa E. Wohl, Steven Opoku, Stephen Yaw Găinuşă-Bogdan, Alina Ribeyre, Fabienne Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana |
description |
In West Africa, Harmattan-induced atmospheric and soil droughts represent seasonally recurring hazards for Theobroma cacao L. agro-ecosystems. Under the influence of the Harmattan winds, precipitation is impaired and air humidity and temperature reach stressful levels. Climate change is causing an increase in temperature that will drive up the evaporative power of the atmosphere, risking to harshen both the soil and atmospheric stress. This would further threaten the viability of cacao cultivation in this region. To characterize the response of cacao trees to atmospheric and soil drought, we monitored two sub-plots, with and without irrigation, throughout one Harmattan season (November 2019 - March 2020) in the Eastern region in Ghana. For both treatments we recorded: sap flow velocity, photosynthetic active radiation (PAR) above and below the canopy, soil moisture, temperature, air humidity and daily precipitation. Leaf area index (LAI) was estimated from PAR measurements. To characterize drought responses of mature cocoa trees during the day and at the seasonal scale, we developed two boosted regression trees models (BRT) with the environmental variables measured. The atmospheric component of Harmattan-induced drought was found to affect the canopy to a similar extent as soil water stress, both causing a decline in LAI of 33%. This study confirmed the importance of soil drought but highlighted as well the crucial role of atmospheric drought for this species' transpiration control. Soil and atmospheric water stresses did not have a synergistic effect on transpiration under the studied conditions. The BRT models identified LAI as one of the most influential drivers for sap velocity, which, in turn was sensitive to the interactive effect of both atmospheric and soil drought. Our results highlight that not only reduced precipitation but also increasing atmospheric drought is likely to negatively impact on cacao production in West Africa under increasingly dry conditions imposed by the influence of the Harmattan winds. |
format |
article |
topic_facet |
H50 - Troubles divers des plantes F60 - Physiologie et biochimie végétale physiologie végétale réponse de la plante vent sécheresse stress dû à la sécheresse translocation conditions météorologiques évaluation de l'impact Theobroma cacao http://aims.fao.org/aos/agrovoc/c_25189 http://aims.fao.org/aos/agrovoc/c_25446 http://aims.fao.org/aos/agrovoc/c_8401 http://aims.fao.org/aos/agrovoc/c_2391 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_7869 http://aims.fao.org/aos/agrovoc/c_29565 http://aims.fao.org/aos/agrovoc/c_37938 http://aims.fao.org/aos/agrovoc/c_7713 http://aims.fao.org/aos/agrovoc/c_3253 |
author |
Della Sala, Pietro Cilas, Christian Gimeno, Teresa E. Wohl, Steven Opoku, Stephen Yaw Găinuşă-Bogdan, Alina Ribeyre, Fabienne |
author_facet |
Della Sala, Pietro Cilas, Christian Gimeno, Teresa E. Wohl, Steven Opoku, Stephen Yaw Găinuşă-Bogdan, Alina Ribeyre, Fabienne |
author_sort |
Della Sala, Pietro |
title |
Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana |
title_short |
Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana |
title_full |
Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana |
title_fullStr |
Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana |
title_full_unstemmed |
Assessment of atmospheric and soil water stress impact on a tropical crop: The case of Theobroma cacao under Harmattan conditions in eastern Ghana |
title_sort |
assessment of atmospheric and soil water stress impact on a tropical crop: the case of theobroma cacao under harmattan conditions in eastern ghana |
url |
http://agritrop.cirad.fr/599769/ http://agritrop.cirad.fr/599769/1/1-s2.0-S0168192321003567-main.pdf |
work_keys_str_mv |
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