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EFFECT OF NICKEL AND FYM ON SPINACH AND DIFFERENT FORMS OF NICKEL IN FLUVENTIC USTOCHREPTS OF MIDDLE GUJARAT

Abstract

and absence of FYM (0 and 1 per cent) on different forms of Ni was studied in industrial effluent irrigated (contaminated) and tube well water irrigated (non-contaminated) soils after spinach during 2003 at Anand Agricultural University, Anand. Application of Ni significantly increased different forms of Ni viz., exchangeable, carbonate, oxide, organically bound, residual and total in both the soils. The application of FYM significantly increased exchangeable, oxide and organically bound Ni under contaminated soil, whereas it was true for all the fractions, except residual and total Ni in case of non-contaminated soil. Application of higher rate of Ni (80 mg kg-1) increased exchangeable, carbonate, oxides, organically bound, residual and total Ni by about 1.5, 3.0, 26.3, 7.0, 0.3 and 1.7 times, respectively over Ni0. Similarly, the corresponding values for non-contaminated soil were 0.4, 2.0, 8.3, 3.5, 2.1 and 2.7. Further, except residual fraction of Ni, all other fractions showed more enrichment in contaminated soil than normal soil. Interaction effect of Ni and FYM was significant in altering carbonate, oxide and organic Ni in contaminated soil, while exchangeable, carbonate, oxides and organically bound Ni were affected significantly in case of non-contaminated soil. With the applications of Ni, the overall distribution of the different fractions suggested that the externally added Ni enriched the fractions viz., carbonate and oxide forms with reduction in residual form towards the initial value. However, exchangeable form did not show much change as noticed in the situation wherein Ni was not added. Organically bound Ni was enriched both in absence and presence of Ni with FYM and the corresponding improvement was to the tune of 10.2 and 31.2 per cent over no FYM

V.P. RAMANI, B.K. PATEL, K.P. PATEL AND K.C. PATEL

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