Growth and nitrogen fixation of annual Medicago-Rhizobium associations during winter in Mediterranean region

cg.contactarmand.guckert@ensaia.inpl-nancy.fren_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerFrench National Research Institute for Agriculture, Food and Environment - INRAE Franceen_US
cg.contributor.centerUniversity of Aleppo, Faculty of Agricultureen_US
cg.contributor.centerUniversity of Lorraine, Agronomy and Environment Laboratory - UL France - LAEen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.date.embargo-end-dateTimelessen_US
cg.identifier.doihttps://dx.doi.org/10.1016/S1161-0301(01)00103-4en_US
cg.isijournalISI Journalen_US
cg.issn1161-0301en_US
cg.issue3en_US
cg.journalEuropean Journal of Agronomyen_US
cg.subject.agrovocnitrogen fixationen_US
cg.subject.agrovoclow temperatureen_US
cg.subject.agrovocnodulationen_US
cg.volume15en_US
dc.contributorGintzburger, Gustaveen_US
dc.contributorObaton, Men_US
dc.contributorRobin, Christopheen_US
dc.contributorTouchane, Hen_US
dc.contributorGuckert, Armanden_US
dc.creatorSultan, Khathijahen_US
dc.date.accessioned2021-07-27T19:33:23Z
dc.date.available2021-07-27T19:33:23Z
dc.description.abstractLow winter temperature in Mediterranean rangelands delays the growth of most pasture and forage plants and, in particular, annual Medicago (medics). Finding proper associations of medic-Rhizobium, capable to grow and fix nitrogen at low temperature, is necessary to extend the grazing period. In this paper, we studied the performance of three Medicago cultivars: M. aculeata accessions 80 (A) and 5099 (B) and M. rigidula accession 716 (R), grown in the field with three different nitrogen sources. The first treatment (N) was obtained through fertilization, while the second (I) was ensured by inoculation with different strains of Rhizobium meliloti (M620, M508 and BZI). A third treatment (C) was used as a control, neither inoculated nor fertilized. The trial was repeated for 2 consecutive years (1998 and 1999) at ICARDA research station (Aleppo, Syria). Plant development, dry matter production and nodule initiation were investigated. The percentage of fixation-derived shoot nitrogen was also quantified using 15N dilution technique. Our results indicate a genotypic variation in low-temperature tolerance of annual medics. Accession A had a slow growth pattern with low dry matter production compared with B and R over the two seasons. In the two seasons and at the early growth stages, Rhizobium strain played a key role in plant growth, where both inoculated and fertilized plants of accession R had a comparable dry matter. Furthermore, the proportion of nitrogen derived from fixation in A was very low, which was reflected, in turn, on the total amount of fixed nitrogen. The proportion of fixed nitrogen of the association R-BZI was high for the 2 years, where it reached 72 and 87% of the total N in the plant, respectively. It is suggested that associations differed in their response to low winter temperature. Among those we studied, M. rigidula accession 716, inoculated with the strain BZI, proved to be the most adapted association to our environment. In addition, M. aculeata accession 5099 seems to be promising for winter growth, but it needs to be inoculated with a strain more adapted to low temperature.en_US
dc.identifierhttps://mel.cgiar.org/dspace/limiteden_US
dc.identifier.citationKhathijah Sultan, Gustave Gintzburger, M Obaton, Christophe Robin, H Touchane, Armand Guckert. (1/11/2001). Growth and nitrogen fixation of annual Medicago-Rhizobium associations during winter in Mediterranean region. European Journal of Agronomy, 15 (3), pp. 221-229.en_US
dc.identifier.statusTimeless limited accessen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/13513
dc.languageenen_US
dc.publisherElsevier (12 months)en_US
dc.sourceEuropean Journal of Agronomy;15,(2001) Pagination 221-229en_US
dc.subjectmediterranean conditionsen_US
dc.subjectannual medicsen_US
dc.subject15n isotopic dilutionen_US
dc.titleGrowth and nitrogen fixation of annual Medicago-Rhizobium associations during winter in Mediterranean regionen_US
dc.typeJournal Articleen_US
dcterms.available2001-10-30en_US
dcterms.extent221-229en_US
dcterms.issued2001-11-01en_US
mel.impact-factor5.124en_US

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