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Volume 7, Issue 3, June Issue - 2019, Pages:255-265

Authors: Priyal Pandey, Mahendra Kumar Verma, Nirmal De
Abstract: The present study was formalized to address the effect of chitosan-grafted polyacrylamide composite on soil and therefore an innovative eco-friendly chitosan-based composite was synthesized and its probable effect on soil chemical and biological properties were analyzed. Chitosan grafted polyacrylamide composite has been synthesized in the Department of Soil Science and Agricultural Chemistry, Institute of Agricultural Sciences, Banaras Hindu University. Synthesized Chitosan grafted polyacrylamide was characterized by Fourier transformation infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Atomic force microscopy (AFM). Composite showed rough morphology with an average roughness 26.17 nm, found to be partially amorphous with the presence of functional group from both acrylamide and chitosan. A lab incubation study for six months revealed that synthesized composites addition in soils (Alfisol and Inceptisol) of Gangetic plain region significantly increased soil electrical conductivity (EC), cation exchange capacity (CEC), catalase activity, dehydrogenase activity, and soil microbial biomass carbon content. Composite addition in soil did not altered soil pH, acid phosphatase activity, alkaline phosphatase activity and only urease activity in soil was found to be decreased during the incubation period. The implication of information about the effect of composite addition on soil properties is crucial for its usage and application in the soil system. This valuable information might be helpful in promoting more effective use of biopolymer-based composite rather than acrylate based composite in agriculture as a slow release carrier of fertilizers and water in the soil.
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