Root penetration is associated with root diameter and root growth rate in tropical forage grasses

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cg.authorship.typesCGIAR and advanced research instituteen_US
cg.contributor.affiliationInternational Center for Tropical Agricultureen_US
cg.contributor.affiliationRoyal University of Agricultureen_US
cg.contributor.affiliationUniversity of Adelaideen_US
cg.contributor.donorAustralian Centre for International Agricultural Researchen_US
cg.contributor.initiativeMixed Farming Systemsen_US
cg.creator.identifierChanthy Huot: 0000-0003-1557-9070en_US
cg.creator.identifierYi Zhou: 0000-0002-7119-7408en_US
cg.creator.identifierMatthew Denton: 0000-0002-2804-0384en_US
cg.identifier.doihttps://doi.org/10.3390/grasses4010004en_US
cg.issn2813-3463en_US
cg.issue1en_US
cg.journalGrassesen_US
cg.reviewStatusPeer Reviewen_US
cg.subject.actionAreaResilient Agrifood Systemsen_US
cg.subject.alliancebiovciatLIVESTOCKen_US
cg.subject.alliancebiovciatPLANT BREEDINGen_US
cg.subject.alliancebiovciatSOIL INFORMATIONen_US
cg.subject.alliancebiovciatTROPICAL FORAGESen_US
cg.subject.impactAreaNutrition, health and food securityen_US
cg.subject.sdgSDG 1 - No povertyen_US
cg.subject.sdgSDG 2 - Zero hungeren_US
cg.subject.sdgSDG 13 - Climate actionen_US
cg.volume4en_US
dc.contributor.authorHuot, Chanthyen_US
dc.contributor.authorPhilp, Joshua N. M.en_US
dc.contributor.authorZhou, Yien_US
dc.contributor.authorDenton, Matthew D.en_US
dc.date.accessioned2025-01-28T07:05:47Zen_US
dc.date.available2025-01-28T07:05:47Zen_US
dc.identifier.urihttps://hdl.handle.net/10568/170166en_US
dc.titleRoot penetration is associated with root diameter and root growth rate in tropical forage grassesen_US
dcterms.abstractSoil compaction impedes root exploration by plants, which limits access to nutrients and water, ultimately compromising survival. The capability of roots to penetrate hard soils is therefore advantageous. While root penetration has been studied in various annual crops, the relationships between root growth and root penetration are poorly understood in tropical perennial grasses. This study aimed to compare root penetration capability in 10 tropical perennial forage grasses and identify relationships between root penetration, root diameter and vertical root growth. Root penetration of each species, namely Urochloa (syn. Brachiaria) brizantha cv. Mekong Briz, U. decumbens cv. Basilisk, U. humidicola cv. Tully, U. hybrid cv. Mulato II, U. mosambicensis cv. Nixon, U. ruziziensis cv Kennedy, Panicum coloratum cv. Makarikariense, Megathyrsus maximus (syn. Panicum maximum) cv. Tanzânia, Paspalum scrobiculatum (syn. Paspalum coloratum) cv. BA96 10 and Setaria sphacelata cv Solendar, was evaluated using wax layers of varying resistances, created from a mixture of 40% (1.39 MPa) and 60% (2.12 MPa) paraffin wax, combined with petroleum jelly. Reference root sizes were determined for the grass species by measuring root diameter and root lengths of seedlings grown in growth pouches. Vertical root growth rate for each species was measured in grasses grown in 120 cm deep rhizotrons. Species with greater root penetration at both resistances had significantly higher shoot growth rates (r = 0.65 at 40% wax and 0.66 at 60% wax) and greater root diameters (r = 0.67 at 40% wax and 0.68 at 60% wax). Root penetration was significantly higher in species with greater vertical root growth rate only in the 60% wax treatment (r = 0.82). Root penetration at higher resistance was correlated with the root diameter and rapid vertical root growth of the species. This may indicate a contribution of these traits to root penetration ability. The combination of greater root diameter and root vertical growth rate, as observed in M. maximus, may assist in the identification of perennial forage grasses suitable for agroecosystems challenged by soil compaction and rapidly drying soil surface.en_US
dcterms.accessRightsOpen Accessen_US
dcterms.available2025-01-16en_US
dcterms.bibliographicCitationHuot, C.; Philp, J.N.M.; Zhou, Y.; Denton, M.D. (2025) Root penetration is associated with root diameter and root growth rate in tropical forage grasses. Grasses 4(1): 4. ISSN: 2813-3463en_US
dcterms.extent4en_US
dcterms.issued2025-01-16en_US
dcterms.languageenen_US
dcterms.licenseCC-BY-4.0en_US
dcterms.publisherMultidisciplinary Digital Publishing Instituteen_US
dcterms.subjecturochloaen_US
dcterms.subjectroot penetration depthen_US
dcterms.subjectprofundidad de penetración de la raízen_US
dcterms.subjectsoil compactionen_US
dcterms.subjectcompactación del sueloen_US
dcterms.subjecttensile strengthen_US
dcterms.subjectpaspalumen_US
dcterms.subjectresistencia a la tensiónen_US
dcterms.typeJournal Articleen_US

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