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Saurabh, Kirti; Kanchikeri Math, Manjaiah; Datta, Samar Chandra; Thekkumpurath, Ahammed Shabeer; Kumar, Rajesh
Archiv für Acker- und Pflanzenbau und Bodenkunde, 03/2019, Letnik: 65, Številka: 4Journal Article
Nanoclay polymer composites (NCPCs) were synthesized with partially neutralized acrylic acid and bentonites and loaded with urea and nitrification inhibitors (NIs) to act as a slow release carrier of nitrogen (N). The resulting product was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The XRD of NCPCs revealed that the bentonite layers were completely exfoliated and dispersed in the composite after the polymerization. The water absorbency of pure polymer (Acrylic acid + Acrylamide) was 197.53 g g −1 and 137.75 g g −1 by nanocomposite (8% nanobentonite) in distilled water. The nitrification inhibition ability of these NCPCs was evaluated by incubation study for 60 days in laboratory at 28°C and 50% water-holding capacity. The Schiff base -NCPCs were most effective at inhibiting nitrification (30-87%) compared to dicyandiamide and Neem oil. A column study was performed to know the movement of NH 4 -N and NO 3 -N at three different depths. Result showed that the Schiff base -NCPC decreased nitrate movement by 78.5% at the depth of 5 cm in soil column. The slow release of nitrogen and good water retention capacity confirmed that these NCPCs can be viably exploited for application in agriculture.
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