Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance
Introduction: Rice plays a critical role in human livelihoods and food security. However, its cultivation requires inputs that are not accessible to all farming communities and can have negative effects on ecosystems. simultaneously, ecological research demonstrates that biodiversity management within fields contributes to ecosystem functioning. Methods: This study aims to evaluate the mixture effect of four functionally distinct rice varieties in terms of characteristics and agronomic performance and their spatial arrangement on the upland rice performance in the highlands of Madagascar. The study was conducted during the 2021-2022 rainfall season at two close sites in Madagascar. Both site differ from each other's in soil properties and soil fertility management. The experimental design at each site included three modalities: i) plot composition, i.e., pure stand or binary mixture; ii) the balance between the varieties within a mixture; iii) and for the balanced mixture (50% of each variety), the spatial arrangement, i.e., row or checkerboard patterns. Data were collected on yields (grain and biomass), and resistance to Striga asiatica infestation, Pyricularia oryzea and bacterial leaf blight (BLB) caused by Xanthomonas oryzae-pv from each plot. Results and discussion: Varietal mixtures produced significantly higher grain and biomass yields, and significantly lower incidence of Pyricularia oryzea compared to pure stands. No significant differences were observed for BLB and striga infestation. These effects were influenced by site fertility, the less fertilized site showed stronger mixture effects with greater gains in grain yield (60%) and biomass yield (42%). The most unbalanced repartition (75% and 25% of each variety) showed the greatest mixture effect for grain yield at both sites, with a strong impact of the varietal identity within the plot. The mixture was most effective when EARLY_MUTANT_IAC_165 constituted 75% of the density associated with other varieties at 25% density. The assessment of the net effect ratio of disease, an index evaluating the mixture effect in disease reduction, indicated improved disease resistance in mixtures, regardless of site conditions. Our study in limited environments suggests that varietal mixtures can enhance rice productivity, especially in low-input situations. Further research is needed to understand the ecological mechanisms behind the positive mixture effect.
id |
dig-cirad-fr-608450 |
---|---|
record_format |
koha |
institution |
CIRAD FR |
collection |
DSpace |
country |
Francia |
countrycode |
FR |
component |
Bibliográfico |
access |
En linea |
databasecode |
dig-cirad-fr |
tag |
biblioteca |
region |
Europa del Oeste |
libraryname |
Biblioteca del CIRAD Francia |
language |
eng |
topic |
F01 - Culture des plantes F40 - Écologie végétale H20 - Maladies des plantes riz pluvial Striga asiatica Xanthomonas oryzae variété Oryza sativa rendement des cultures résistance aux maladies pure stands [EN] agroécosystème biodiversité performance de culture riz Pyricularia facteur climatique http://aims.fao.org/aos/agrovoc/c_8076 http://aims.fao.org/aos/agrovoc/c_32337 http://aims.fao.org/aos/agrovoc/c_24383 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_5f344aba http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_35199 http://aims.fao.org/aos/agrovoc/c_6599 http://aims.fao.org/aos/agrovoc/c_16024 http://aims.fao.org/aos/agrovoc/c_29554 http://aims.fao.org/aos/agrovoc/c_4510 F01 - Culture des plantes F40 - Écologie végétale H20 - Maladies des plantes riz pluvial Striga asiatica Xanthomonas oryzae variété Oryza sativa rendement des cultures résistance aux maladies pure stands [EN] agroécosystème biodiversité performance de culture riz Pyricularia facteur climatique http://aims.fao.org/aos/agrovoc/c_8076 http://aims.fao.org/aos/agrovoc/c_32337 http://aims.fao.org/aos/agrovoc/c_24383 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_5f344aba http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_35199 http://aims.fao.org/aos/agrovoc/c_6599 http://aims.fao.org/aos/agrovoc/c_16024 http://aims.fao.org/aos/agrovoc/c_29554 http://aims.fao.org/aos/agrovoc/c_4510 |
spellingShingle |
F01 - Culture des plantes F40 - Écologie végétale H20 - Maladies des plantes riz pluvial Striga asiatica Xanthomonas oryzae variété Oryza sativa rendement des cultures résistance aux maladies pure stands [EN] agroécosystème biodiversité performance de culture riz Pyricularia facteur climatique http://aims.fao.org/aos/agrovoc/c_8076 http://aims.fao.org/aos/agrovoc/c_32337 http://aims.fao.org/aos/agrovoc/c_24383 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_5f344aba http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_35199 http://aims.fao.org/aos/agrovoc/c_6599 http://aims.fao.org/aos/agrovoc/c_16024 http://aims.fao.org/aos/agrovoc/c_29554 http://aims.fao.org/aos/agrovoc/c_4510 F01 - Culture des plantes F40 - Écologie végétale H20 - Maladies des plantes riz pluvial Striga asiatica Xanthomonas oryzae variété Oryza sativa rendement des cultures résistance aux maladies pure stands [EN] agroécosystème biodiversité performance de culture riz Pyricularia facteur climatique http://aims.fao.org/aos/agrovoc/c_8076 http://aims.fao.org/aos/agrovoc/c_32337 http://aims.fao.org/aos/agrovoc/c_24383 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_5f344aba http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_35199 http://aims.fao.org/aos/agrovoc/c_6599 http://aims.fao.org/aos/agrovoc/c_16024 http://aims.fao.org/aos/agrovoc/c_29554 http://aims.fao.org/aos/agrovoc/c_4510 Rahajaharilaza, Koloina Muller, Bertrand Violle, Cyrille Vom Brocke, Kirsten Ramavovololona, Morel, Jean-Benoit Ballini, Elsa Fort, Florian Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance |
description |
Introduction: Rice plays a critical role in human livelihoods and food security. However, its cultivation requires inputs that are not accessible to all farming communities and can have negative effects on ecosystems. simultaneously, ecological research demonstrates that biodiversity management within fields contributes to ecosystem functioning. Methods: This study aims to evaluate the mixture effect of four functionally distinct rice varieties in terms of characteristics and agronomic performance and their spatial arrangement on the upland rice performance in the highlands of Madagascar. The study was conducted during the 2021-2022 rainfall season at two close sites in Madagascar. Both site differ from each other's in soil properties and soil fertility management. The experimental design at each site included three modalities: i) plot composition, i.e., pure stand or binary mixture; ii) the balance between the varieties within a mixture; iii) and for the balanced mixture (50% of each variety), the spatial arrangement, i.e., row or checkerboard patterns. Data were collected on yields (grain and biomass), and resistance to Striga asiatica infestation, Pyricularia oryzea and bacterial leaf blight (BLB) caused by Xanthomonas oryzae-pv from each plot. Results and discussion: Varietal mixtures produced significantly higher grain and biomass yields, and significantly lower incidence of Pyricularia oryzea compared to pure stands. No significant differences were observed for BLB and striga infestation. These effects were influenced by site fertility, the less fertilized site showed stronger mixture effects with greater gains in grain yield (60%) and biomass yield (42%). The most unbalanced repartition (75% and 25% of each variety) showed the greatest mixture effect for grain yield at both sites, with a strong impact of the varietal identity within the plot. The mixture was most effective when EARLY_MUTANT_IAC_165 constituted 75% of the density associated with other varieties at 25% density. The assessment of the net effect ratio of disease, an index evaluating the mixture effect in disease reduction, indicated improved disease resistance in mixtures, regardless of site conditions. Our study in limited environments suggests that varietal mixtures can enhance rice productivity, especially in low-input situations. Further research is needed to understand the ecological mechanisms behind the positive mixture effect. |
format |
article |
topic_facet |
F01 - Culture des plantes F40 - Écologie végétale H20 - Maladies des plantes riz pluvial Striga asiatica Xanthomonas oryzae variété Oryza sativa rendement des cultures résistance aux maladies pure stands [EN] agroécosystème biodiversité performance de culture riz Pyricularia facteur climatique http://aims.fao.org/aos/agrovoc/c_8076 http://aims.fao.org/aos/agrovoc/c_32337 http://aims.fao.org/aos/agrovoc/c_24383 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_5f344aba http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_35199 http://aims.fao.org/aos/agrovoc/c_6599 http://aims.fao.org/aos/agrovoc/c_16024 http://aims.fao.org/aos/agrovoc/c_29554 http://aims.fao.org/aos/agrovoc/c_4510 |
author |
Rahajaharilaza, Koloina Muller, Bertrand Violle, Cyrille Vom Brocke, Kirsten Ramavovololona, Morel, Jean-Benoit Ballini, Elsa Fort, Florian |
author_facet |
Rahajaharilaza, Koloina Muller, Bertrand Violle, Cyrille Vom Brocke, Kirsten Ramavovololona, Morel, Jean-Benoit Ballini, Elsa Fort, Florian |
author_sort |
Rahajaharilaza, Koloina |
title |
Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance |
title_short |
Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance |
title_full |
Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance |
title_fullStr |
Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance |
title_full_unstemmed |
Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance |
title_sort |
upland rice varietal mixtures in madagascar: evaluating the effects of varietal interaction on crop performance |
url |
http://agritrop.cirad.fr/608450/ http://agritrop.cirad.fr/608450/1/fpls-14-1266704.pdf |
work_keys_str_mv |
AT rahajaharilazakoloina uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance AT mullerbertrand uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance AT viollecyrille uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance AT vombrockekirsten uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance AT ramavovololona uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance AT moreljeanbenoit uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance AT ballinielsa uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance AT fortflorian uplandricevarietalmixturesinmadagascarevaluatingtheeffectsofvarietalinteractiononcropperformance |
_version_ |
1794797488865017856 |
spelling |
dig-cirad-fr-6084502024-03-04T13:28:25Z http://agritrop.cirad.fr/608450/ http://agritrop.cirad.fr/608450/ Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance. Rahajaharilaza Koloina, Muller Bertrand, Violle Cyrille, Vom Brocke Kirsten, Ramavovololona, Morel Jean-Benoit, Ballini Elsa, Fort Florian. 2023. Frontiers in Plant Science, 14:1266704, 15 p.https://doi.org/10.3389/fpls.2023.1266704 <https://doi.org/10.3389/fpls.2023.1266704> Upland rice varietal mixtures in Madagascar: Evaluating the effects of varietal interaction on crop performance Rahajaharilaza, Koloina Muller, Bertrand Violle, Cyrille Vom Brocke, Kirsten Ramavovololona, Morel, Jean-Benoit Ballini, Elsa Fort, Florian eng 2023 Frontiers in Plant Science F01 - Culture des plantes F40 - Écologie végétale H20 - Maladies des plantes riz pluvial Striga asiatica Xanthomonas oryzae variété Oryza sativa rendement des cultures résistance aux maladies pure stands [EN] agroécosystème biodiversité performance de culture riz Pyricularia facteur climatique http://aims.fao.org/aos/agrovoc/c_8076 http://aims.fao.org/aos/agrovoc/c_32337 http://aims.fao.org/aos/agrovoc/c_24383 http://aims.fao.org/aos/agrovoc/c_8157 http://aims.fao.org/aos/agrovoc/c_5438 http://aims.fao.org/aos/agrovoc/c_10176 http://aims.fao.org/aos/agrovoc/c_2328 http://aims.fao.org/aos/agrovoc/c_5f344aba http://aims.fao.org/aos/agrovoc/c_36669 http://aims.fao.org/aos/agrovoc/c_33949 http://aims.fao.org/aos/agrovoc/c_35199 http://aims.fao.org/aos/agrovoc/c_6599 http://aims.fao.org/aos/agrovoc/c_16024 http://aims.fao.org/aos/agrovoc/c_29554 Madagascar http://aims.fao.org/aos/agrovoc/c_4510 Introduction: Rice plays a critical role in human livelihoods and food security. However, its cultivation requires inputs that are not accessible to all farming communities and can have negative effects on ecosystems. simultaneously, ecological research demonstrates that biodiversity management within fields contributes to ecosystem functioning. Methods: This study aims to evaluate the mixture effect of four functionally distinct rice varieties in terms of characteristics and agronomic performance and their spatial arrangement on the upland rice performance in the highlands of Madagascar. The study was conducted during the 2021-2022 rainfall season at two close sites in Madagascar. Both site differ from each other's in soil properties and soil fertility management. The experimental design at each site included three modalities: i) plot composition, i.e., pure stand or binary mixture; ii) the balance between the varieties within a mixture; iii) and for the balanced mixture (50% of each variety), the spatial arrangement, i.e., row or checkerboard patterns. Data were collected on yields (grain and biomass), and resistance to Striga asiatica infestation, Pyricularia oryzea and bacterial leaf blight (BLB) caused by Xanthomonas oryzae-pv from each plot. Results and discussion: Varietal mixtures produced significantly higher grain and biomass yields, and significantly lower incidence of Pyricularia oryzea compared to pure stands. No significant differences were observed for BLB and striga infestation. These effects were influenced by site fertility, the less fertilized site showed stronger mixture effects with greater gains in grain yield (60%) and biomass yield (42%). The most unbalanced repartition (75% and 25% of each variety) showed the greatest mixture effect for grain yield at both sites, with a strong impact of the varietal identity within the plot. The mixture was most effective when EARLY_MUTANT_IAC_165 constituted 75% of the density associated with other varieties at 25% density. The assessment of the net effect ratio of disease, an index evaluating the mixture effect in disease reduction, indicated improved disease resistance in mixtures, regardless of site conditions. Our study in limited environments suggests that varietal mixtures can enhance rice productivity, especially in low-input situations. Further research is needed to understand the ecological mechanisms behind the positive mixture effect. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/608450/1/fpls-14-1266704.pdf text cc_by info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ https://doi.org/10.3389/fpls.2023.1266704 10.3389/fpls.2023.1266704 info:eu-repo/semantics/altIdentifier/doi/10.3389/fpls.2023.1266704 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.3389/fpls.2023.1266704 info:eu-repo/semantics/dataset/purl/figshare.com/articles/dataset/Assessing_the_impact_of_rice_varietal_mixtures_on_crop_performance_in_Madagascar/24488386 info:eu-repo/grantAgreement///ANR-16-IDEX-0006//(FRA) MUSE/MUSE |