Academic Journal
The genotypic variation in the positive response of sorghum to higher sowing density is linked to an increase in water use efficiency
| العنوان: | The genotypic variation in the positive response of sorghum to higher sowing density is linked to an increase in water use efficiency |
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| المؤلفون: | Pilloni, Raphael, Kakkera, Aparna, Jana, Kholova, Tardieu, François, Vincent, Vadez, Vadez, Vincent |
| المساهمون: | Diversité, adaptation, développement des plantes (UMR DIADE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD Occitanie )-Université de Montpellier (UM), Agroécologie et intensification durables des cultures annuelles (UPR AIDA), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), International Crops Research Institute for the Semi-Arid Tropics Inde (ICRISAT), Consultative Group on International Agricultural Research CGIAR (CGIAR), Czech University of Life Sciences Prague (CZU), Écophysiologie des Plantes sous Stress environnementaux (LEPSE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Centre d'Etude Regional Pour l'Amelioration de l'Adaptation A la Secheresse (CERAAS), Occitanie Region through a financial contribution to grant ANR-17-MPGA-0011, ANR-17-MPGA-0011,ICARUS,Improve Crops in Arid Regions and future climates(2017), ANR-16-IDEX-0006,MUSE,MUSE(2016) |
| المصدر: | ISSN: 1161-0301 ; European Journal of Agronomy ; https://hal.inrae.fr/hal-04680017 ; European Journal of Agronomy, 2024, 158, pp.127207. ⟨10.1016/j.eja.2024.127207⟩. |
| بيانات النشر: | HAL CCSD Elsevier |
| سنة النشر: | 2024 |
| مصطلحات موضوعية: | Productivity, Sustainable intensification, Semi-arid tropics, Vapor pressure deficit, Lysimeters, Fodder, [SDV.SA.AGRO]Life Sciences [q-bio]/Agricultural sciences/Agronomy, [SDV.BBM.GTP]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Genomics [q-bio.GN] |
| الوصف: | International audience ; In semi-arid tropical areas, sorghum is sown at very low planting densities. Hence, increasing plant density represents an opportunity to improve productivity. However, assessing the expected increase in water needs is critical prior to testing higher densities under rainfed conditions. This was tested with a panel of elite cultivars in field and lysimiter experiments, and testing the effects of two density treatment, high (HD, 22 plants.m -2 ) and low (LD, 11 plants.m -2 ), on grain and biomass yield and on water use and water use efficiency (WUE). Doubling the conventional sowing density significantly increased biomass and grain yield, with a genotypic variability in the biomass response. No link was found between the response to density and the maintenance of the tillering capacity, whereas the response to density was somewhat explained by a differential increase in the leaf area index under high density (r=0.43 P<0.05). Lysimeter experiments showed that, compared with the conventional density, the high-density treatment had 62% increase in biomass vs a 38% increase in water use, resulting in a 17% higher WUE on average of the genotypes tested. There was an appreciable genotypic variability in this degree of WUE increase under high density. The most striking result was the very tight positive link between the biomass response to density and the differential increase in WUE in the dry season (r=0.91 P<0.0001), whereas in the wet season this link was negative (r=-0.48 P<0.02). This work shows that intensifying sorghum production by increasing sowing density is possible, in the short term using cultivars that show the largest WUE increase under high density, in the longer term by breeding high-density adapted cultivars, targeting plant traits that explain the tight link between higher WUE and higher yield under high density |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1016/j.eja.2024.127207 |
| الاتاحة: | https://hal.inrae.fr/hal-04680017 https://hal.inrae.fr/hal-04680017v1/document https://hal.inrae.fr/hal-04680017v1/file/Pilloni-EJA-2024-CC-BY.pdf https://doi.org/10.1016/j.eja.2024.127207 |
| Rights: | http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.2BFA4D03 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.eja.2024.127207 |
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