phytotoxic limits of
in intensively cultivated alluvial soils
Barman and S.P. Datta*
Division of Soil
Science and Agricultural Chemistry, ICAR-Indian Agricultural Research
Institute, New Delhi-110 012, India
Author E-mail: email@example.com
Paper received : 03.12.2016
Revised received : 12.05.2017
Re-revised received :
Accepted : 28.09.2017
Aim: Studies on nickel
pollution in soil have been mostly confined to its determination in soils
receiving sewage sludge and industrial effluents and no systematic effort has
been made to work out its phytotoxic limits in soil and plant. Hence, an
attempt was made to establish the phytotoxic limit of Ni in alluvial soils
and soybean plant.
greenhouse experiment was carried out with fifteen bulk surface (0-15 cm)
soil samples. These samples were collected from cultivated fields receiving
irrigation through fresh water, sewage and industrial effluents. Nickel was
applied @ 0, 5, 50 and 100 mg kg-1 as NiSO4. 6H2O.
Soybean plants grew up to flowering stage. Post harvest soil samples were
extracted with DTPA and plant samples were digested with di-acid. Nickel
content in the extract was measured using atomic absorption
an average, dry matter yield of soybean was reduced by 1.56, 17.9 and 29.2%
at 5, 50 and 100 mg kg-1 of applied Ni, respectively, over control
due to phyotoxicity.
limits of DTPA extractable Ni in soil and total Ni content in plant were
computed as 3.24 and 12.0 mg kg-1, respectively.
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