Author(s):

Surya Kant, PK Sharma and Vipin Kumar

Abstract: Pot experiments were conducted in the net house of Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, B.H.U., Varanasi in alluvial soil during 2015-16 using maize-mustard cropping sequence to study the effect of chelating compounds on growth of maize and mustard in chromium contaminated soil. Five levels of chromium viz. 0, 5, 10, 20, and 30 ppm with and without five types of chelating compounds viz. EDTA, DTPA, Oxalic Acid, Citric Acid, and Humic Acid were applied. All the treatments of chelating compounds were applied to maize in kharif season and mustard was taken in rabi season as residual crop after harvesting of maize crop. Plant height (cm), number of leaves per plant, chlorophyll content (SPAD value) and dry matter accumulation were recorded at different growth stages starting from 30 days after showing (DAS), 60 DAS and at harvesting. Results indicated that growth parameters (plant height, number of leaves per plant, chlorophyll content and dry matter accumulation) of maize and mustard decreased with increasing Cr concentration (0, 5, 10, 20, and 30 ppm). The growth parameters significantly increased with the application of chelating compounds. There were no significant effects due to the application of oxalic acid and citric acid on the growth parameters of both the plant species; however humic acid, DTPA and EDTA significantly influence the growth of maize and mustard. At every level of chromium treatment with humic acid (1 g kg^-1) gave batter results followed by treatment with DTPA (10 mMole kg^-1).

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