caa a22 4500 477110991 CHVBK 20180405111609.0 cr unu---uuuuu 170330e19961001xx s 000 0 eng 10.1007/BF02415521 doi (NATIONALLICENCE)springer-10.1007/BF02415521 Extractability of nickel and its concentration in cultivated plants in Ni rich ultramafic soils of New Caledonia [Elektronische Daten] [Laurent L'Huillier, Sylvie Edighoffer] The presence of higher-than-normal quantities of nickel is one of the most general features of ultramafic soils and is often suspected as the reason for their infertility. This study on the bioavailability of Ni in ultramafic soils derived from peridotites in New Caledonia showed important variations depending on the position of the soil in the landscape. In piedmont and non hydromorphic colluvio-alluvial soils, Ni was poorly absorbed by cultivated plants. In contrast, crops species grown in the plain soils, especially those found in the colluvio-alluvial and plain soils subject to temporary reducing conditions, possessed very high and even toxic Ni concentrations. Extraction of Ni by DTPA 5 mM was an effective method of estimating Ni bioavailability in these soils. The regression equation developed with only DTPA-extractable ni explained 88% of the variability in tomato Ni concentration. Extractable Ni might originate from the association of Ni with primary alterable minerals, organic matter and goethite. ei]Section editor: L V Kochian Kluwer Academic Publishers, 1996 Key words nationallicence bioavailability nationallicence crop plants nationallicence DTPA nationallicence maize nationallicence Ni uptake nationallicence toxicity nationallicence L'Huillier Laurent Agropedology Laboratory, ORSTOM, B.P. A5, 98 848, Noumea cedex, New-Caledonia aut Edighoffer Sylvie Agropedology Laboratory, ORSTOM, B.P. A5, 98 848, Noumea cedex, New-Caledonia aut Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 255-264 0032-079X 186:2<255 1996 186 11104 https://doi.org/10.1007/BF02415521 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02415521 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- L'Huillier Laurent Agropedology Laboratory, ORSTOM, B.P. A5, 98 848, Noumea cedex, New-Caledonia aut NATIONALLICENCE 700 1- Edighoffer Sylvie Agropedology Laboratory, ORSTOM, B.P. A5, 98 848, Noumea cedex, New-Caledonia aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers 186/2(1996-10-01), 255-264 0032-079X 186:2<255 1996 186 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer