Nitrogen fixation and growth of Lens culinaris as affected by nickel availability: A pre-requisite for optimization of gromining
2016
Saad, Ramez | Kobaissi, A. | Robin, Christophe | Echevarria, Guillaume | Benizri, E | Laboratoire Sols et Environnement (LSE) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | Laboratoire "Biologie, Végétale et Environnement" - Faculté des Sciences ; Université Libanaise | Laboratoire Agronomie et Environnement (LAE) ; Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL) | French National Research Agency through the national "Investissements d'avenir" program (ANR-10-LABX-21-LABEX RESSOURCES21 ; ANR-14-CE04-0005) ; Association of Specialization and Scientific Guidance (ASSG) | ANR-10-LABX-0021,RESSOURCES21,Strategic metal resources of the 21st century(2010) | ANR-14-CE04-0005,AGROMINE,Agromine des métaux stratégiques issus de matrices contaminées(2014)
Low soil fertility in ultramafic soils limits the efficiency of nickel phytoextraction. Developing more efficient cropping systems for agromining can be achieved by the association of a hyperaccumulator with a legume by enhancing soil fertility. However, legume crops can result sensitive to ultramafic soil conditions, including nickel Ni availability. We assessed here whether Lens culinaris is adapted to ultramafic environments by growing on soils displaying a wide range of Ni concentrations and consequently producing functional nodules. The soil was enriched with different Ni concentrations ([Ni]) (0–90 mg Ni kg 1). Natural 15N abundance was used to assess N2 fixation (%Ndfa). Biotic parameters were investigated (nodule number, Ni, carbon and nitrogen concentrations, plant biomass . . . ). Soil parameters were investigated (total [Ni], DTPA-extractable Ni, C and N concentrations . . . ). Most of the physicochemical and biological parameters were significantly affected by the increased soil [Ni]. Nodule numbers per plant was lower under high [Ni] than control (soil without Ni). Nodules lost their capacities to fix N2 under high Ni addition (90 mg Ni kg 1). For many parameters, there were no significant differences between control and treatments up to 60 mg of Ni kg 1 added to the soil. Lentil is able to grow on a soil containing amounts of Ni-DTPA similar to those generally found in serpentine soils. It could be used in association with a hyperaccumulator plant as a nitrogen provider in order to optimize Ni agromining.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique