Copper and zinc uptake by rice and accumulation in soil amended with municipal solid waste compost |
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Authors: | P Bhattacharyya A Chakraborty K Chakrabarti S Tripathy MA Powell |
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Institution: | (1) Department of Geology and Geophysics, Indian Institute of Technology, 721302 Kharagpur, West Bengal, India;(2) Department of Agronomy, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, West Bengal, India;(3) Department of Agricultural Chemistry and Soil Science, Institute of Agricultural Science, Calcutta University, 35 B.C. Road, 700019 Kolkata, West Bengal, India;(4) Department of Geology and Geophysics, Indian Institute of Technology, 721302 Kharagpur, West Bengal, India;(5) Department of Earth Science, University of Western Ontario, London, Canada;(6) West Bengal State Council of Science and Technology, Bikash Bhawan, North Block, 4th Floor, 700091 Salt Lake City, Kolkata, West Bengal, India |
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Abstract: | Effect of addition of municipal solid waste compost (MSWC) on two metals viz. copper (Cu) and zinc (Zn) contents of submerged
rice paddies were studied. Experiments were conducted during the three consecutive wet seasons from 1997 to 1999 on rice grown
under submergence, at the Experimental Farm of Calcutta University, India. A sequential extraction method was used to determine
the metal (Cu and Zn) fractions in MSWC and cow dung manure (CDM). Both metals were significantly bound to the organic matter
and Fe and Mn oxides in MSWC and CDM. Metal content in rice straw was higher than in rice grain. Metal bound with Fe and Mn
oxides in MSWC and CDM best correlated with straw and grain metal followed by exchangeable and water soluble fractions. Carbonate,
organic matter bound and residual fractions in MSWC and CDM did not significantly correlate with rice straw and grain metal.
The MSWC would be a valuable resource for agriculture if it can be used safely, but long-term field experiments with MSWC
are needed to assess by regular monitoring of the metal loads and accumulation in soil and plants. |
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Keywords: | Biocompost Land application Recycling India |
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