Nickel phytotoxicity in relationship to soil ph manipulation and chelating agents

Influence of nitrogen on the behaviour of nickel in wheat

“…High concentrations of Ni have been found in plants and soil near Ni mines and smelters, and toxic effects on vegetation have been recorded (Temple and Bisessar, 1981). Phytotoxicity of Ni varies with the concentration of Ni in soil solution as well as with the plant species and cultivars (Wallace et al, 1977;Welch, 1981). It is documented that CaCO 3 or NaHCO 3 can decrease Ni uptake and toxicity (Wallace et al, 1977), and it has also been reported that Ni toxicity can be lessened with Ca, Mg, Fe, Cu and Zn (Checkai et al, 1986;Hutchinson, 1981;Iizuka, 1975;Robertson, 1985).…”

Remedial investigation report on the Melton Valley watershed at Oak Ridge National Laboratory, Oak Ridge, Tennessee. Volume 3: Appendix C

“…Addition of 220 mgkg had no effect. Wallace et al (1977b) report the results of experiments on the effects of Ni (as NiSO,) on seedlings of a variety of plants grown in a loam soil at several pH's. Corn grown in soil at pH 4.2, 5.6, and 7.5 experienced 74,80, and 50% reductions in shoot weight after I4 days growth with the addition of 250 mg/kgNi.…”

“…It is generally adsorbed as the Ni(I1) ion and translocated in xylem and phloem with an organic chelate (Hutchinson, 1981). Nickel is fairly uniformly distributed between roots and shoots (Wallace and Romney, 1977b). Symptoms of Ni toxicity are generally Fe-deficiency induced chlorosis and foliar necrosis (Khalid and Tinsley, 1980).…”

White Oak Creek Watershed: Melton Valley Area Remedial Investigation Report, Oak Ridge National Laboratory, Oak Ridge, Tennessee: Volume 3 Appendix C

“…Addition of 220 mgkg had no effect. Wallace et al (1977b) report the results of experiments on the effects of Ni (as NiSO,) on seedlings of a variety of plants grown in a loam soil at several pH's. Corn grown in soil at pH 4.2, 5.6, and 7.5 experienced 74,80, and 50% reductions in shoot weight after 14 days growth with the addition of 250 mgkg Ni.…”