Mobility of lead and nickel in soil in relation to nutrition of sesame

Abstract

The availability of lead and nickel in soil is greatly influenced by farmyard manure. We conducted two pot culture experiments in an Aeric Haplaquept to study the mobility of lead and nickel in soil and their uptake by sesame (Sesamum indicum L.) plant as influenced by the application of farmyard manure. Application of lead (0-500 mg kg 71 ) and nickel (0-500 mg kg 71 ) at different doses to soil and plant increased their availability and such increase was counteracted by the application of farmyard manure (0-3% by weight of soil). The lead and nickel concentrations in soil and shoot dry matter of sesame gradually decreased with the progress of crop growth. The highest DTPAextractable Pb and Ni was 119.3 and 215.5 mg kg 71 in the treatment Pb 500 and Ni 500 , respectively, at 15 days of incubation. The highest Pb and Ni concentrations in the shoot of sesame plant were 23.8 and 24 mg kg 71 observed in the treatment Pb 500 and Ni 500 , respectively, at 15 days of crop growth. The toxic limit of applied Pb and Ni concentration to soil for shoot growth of sesame plant was 50 and 100 mg kg 71 , respectively.

Alteration of macronutrients, metal translocation and bioaccumulation as potential indicators of nickel tolerance in three Vigna species

“…Ni is highly mobile element, absorbed by the roots and then translocated to different plant parts including tissues of fruits and seeds (Naik et al 2010). Hyper accumulation of Ni in edible plant parts is also of hazardous consequences for health as metal enters the food chain via consumption of contaminated plant material by animals and human (Duman and Ozturk 2010;Pande et al 2012).…”