Root development in three tropical grass genotypes grown in contrasting soils and their potential for soil organic carbon accumulation

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cg.authorship.typesCGIAR and advanced research instituteen
cg.contributor.affiliationInternational Center for Tropical Agricultureen
cg.contributor.affiliationUniversidad Politécnica de Madriden
cg.contributor.donorBezos Earth Funden
cg.contributor.initiativeAccelerated Breeding
cg.contributor.initiativeLivestock and Climate
cg.contributor.initiativeSustainable Animal Productivity
cg.contributor.programAcceleratorCGIAR Sustainable Animal and Aquatic Foods science program
cg.coverage.countryColombia
cg.coverage.iso3166-alpha2CO
cg.coverage.regionAmericas
cg.coverage.regionSouth America
cg.coverage.regionLatin America and the Caribbean
cg.creator.identifierMildred Mayorga: 0000-0002-4467-829X
cg.creator.identifierEduardo Vazquez: 0000-0003-4662-1921
cg.creator.identifierJuan Andrés Cardoso Arango: 0000-0002-0252-4655
cg.subject.actionAreaGenetic Innovation
cg.subject.actionAreaResilient Agrifood Systems
cg.subject.alliancebiovciatLIVESTOCKen
cg.subject.alliancebiovciatPLANT GENETIC RESOURCESen
cg.subject.alliancebiovciatSOIL INFORMATIONen
cg.subject.alliancebiovciatTROPICAL FORAGESen
cg.subject.impactAreaClimate adaptation and mitigation
cg.subject.impactAreaNutrition, health and food security
cg.subject.impactAreaPoverty reduction, livelihoods and jobs
cg.subject.sdgSDG 1 - No povertyen
cg.subject.sdgSDG 2 - Zero hungeren
cg.subject.sdgSDG 13 - Climate actionen
dc.contributor.authorMayorga, Mildreden
dc.contributor.authorVázquez, Eduardoen
dc.contributor.authorCardoso, Juan Andresen
dc.date.accessioned2025-07-03T08:23:18Z
dc.date.available2025-07-03T08:23:18Z
dc.identifier.urihttps://hdl.handle.net/10568/175466
dc.titleRoot development in three tropical grass genotypes grown in contrasting soils and their potential for soil organic carbon accumulationen
dcterms.abstractGrasses have significant potential for accumulating soil organic carbon, primarily due to their ability to translocate up to 60% of their gross primary production to belowground organs. Root depth is the most critical factor governing root carbon storage and stabilization in the soil. Urochloa humidicola is a tropical forage species well adapted to acidic, low-fertility soils and exhibits a high capacity for biological nitrification inhibition. Among its genotypes, CIAT679 and Bh08-1149 display contrasting root traits. Meanwhile, Mulato II is a Urochloa hybrid cultivar known for its high biomass production and forage quality. To compare carbon inputs and root development traits among the genotypes CIAT679, Bh08-1149, and Mulato II in two soil types—a high-fertility Vertisol and an acidic, low-fertility Oxisol—a rhizotron experiment was conducted under greenhouse conditions. After six months of growth, Mulato II exhibited the greatest root length, volume, surface area, and diameter, as well as the highest leaf area, photosynthetic rate, and photosystem II efficiency (ΦPSII). However, its root system grew in a more horizontal orientation. Among the U. humidicola genotypes, CIAT679 displayed superior root length, volume, and surface area. When comparing plant development across soil types, those grown in the Oxisol exhibited greater root length, surface area, volume, diameter, depth, and root orientation angle, along with higher photosynthetic rate and ΦPSII. This response is likely due to the Oxisol's higher sand content and lower clay fraction, which facilitate root exploration and growth. The enhanced root system in this soil type likely improves water and nutrient uptake, contributing to superior photosynthetic performance. Notably, the genotypes CIAT679 and Bh08-1149 grown in the Oxisol, developed the deepest roots and their greater root orientation angles indicate more vertical root growth.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationMayorga, M.; Vázquez, E.; Cardoso, J.A. (2025) Root development in three tropical grass genotypes grown in contrasting soils and their potential for soil organic carbon accumulation. 1 p.en
dcterms.extent1 p.en
dcterms.issued2025-06-15
dcterms.languageen
dcterms.licenseCC-BY-4.0
dcterms.subjectroot architectureen
dcterms.subjectarquitectura de raícesen
dcterms.subjectcarbon sequestrationen
dcterms.subjectsecuestro de carbonoen
dcterms.subjecturochloaen
dcterms.subjectroot lengthen
dcterms.subjectroot penetration depthen
dcterms.subjectlongitud de las raícesen
dcterms.subjectprofundidad de penetración de la raízen
dcterms.subjectsoil stabilizationen
dcterms.subjectestabilización del sueloen
dcterms.typePoster

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