Influence of Olea europea L. and Ficus Carrica L. fine root activity on the K biodisponibility and clay mineralogy of the rhizosphere

Eurasian Journal of Soil Science

Mohamed Rebbouh¹  Hallima Ouahab¹  Lila Kessouri¹  Arezki Derridj²  Bruce Velde²  Sophia Mouas-Bourbia³  Malika Boudiaf-Nait Kaci³  Pierre Barre⁴  Malika Mouffok⁴ 

[1] Département des Sciences Agronomiques, Faculté des Sciences Biologiques et Agronomiques, UMMTO, Algérie;LaboratoiredeProduction, Amélioration &Protectiondes Végétaux &des DenréesStockées,Facultédes Sciences Biologiques et Agronomiques, UMMTO, Algérie;Laboratoire Ressources Naturelles, Faculté des Sciences Biologiques et Agronomiques, UMMTO, Algérie;Laboratoire de Géologie, UMR 8538 CNRS-ENS, 24 Rue Lhomond, 75231 Paris Cedex 05, France;

关键词: Clay minerals;    olive tree;    fig tree;    rhizosphere;    potassium;   

DOI  :  http://dx.doi.org/10.18393/ejss.2015.4.220-226

来源: DOAJ

【 摘 要 】

The objective of this study was to compare the effect of fine root activity of Olea europea L. and Ficus carrica L. of soil in its immediate vicinity (in the so-called rhizosphere zone). The study was conducted on two stations in Northern Algeria: Guendoul and Bouira. Olea europea L. and Ficus carrica L. roots significantly modified some chemical properties of rhizosphere soil. Increases of soil carbon, KNH4+ and KHNO3- were observed in the Olea europea L. and Ficus carrica L rhizosphere soil at both stations. Bulk and rhizosphere soil clay mineralogy was similar. Interstratified illite-smectite, smectite-illite and illite were predominant in the clay fraction. Chlorite and kaolinite were less represented. The decomposition of XRD diffractograms of two soil clay fractions using the Decomp program revealed that Olea europea L. roots promote nK+ storage in interlayer position. Indeed, the lower abscissa position of the gravity center (cg) of the X-ray patterns, the peak displacement of clays populationsPCI, I/S, S/Itoward illite peak position indicatesan increase of“illite-like” layer content in the vicinity of Olea europea L. roots. Olea europea L. roots appeared to have more influence on the rhizosphere soil than Ficus carrica L. rootsprobably because of its higher root biomass and the greater activity of the tree in winter (contrary to Ficus Carrica L., Olea europea L. keep their leaves in winter). The two species underground activity seems to be well reflected in their respective rhizosphere.

【 授权许可】

Unknown