Neem (Azadirachtaindica) oil coated urea as a novel controlled release fertilizer: Physical and chemical analysis of structure and its nutrient release behaviour Scientific paper

Main Article Content

Dr. Shiv Om Meena
https://orcid.org/0009-0004-5538-5611
Manish Vashishtha
https://orcid.org/0000-0002-8397-0699
Meenu

Abstract

The development of controlled release fertilizers (CRF) is a green tech-nology that not only reduces nitrogen loss, caused by volatilization and leach­ing, but also alters the kinetics of nitrogen release, which, in turn, provides nut­rients to plants at a pace that is more compatible with their metabolic needs. With an increasing awareness towards human health and environmental pro­tect­ion, there is a rapid shift towards the development of eco-friendly fertil­izers based on natural resources. Majority of the literature on CRF pertains to org­anic and inorganic material based coatings on fertilizers and among them in the case of neem oil coated urea (NCU) most of the literature is confined to the elucidation of coating effect on increasing the crop yield and plant growth. However, literature lacks any comprehensive study on NCU as a CRF, cover­ing major aspects such as its characterization, determination of nutrient release rate, and comparison with other CRF. The present work is an attempt to fill this gap in scientific knowledge about NCU. In the present study, neem oil coated urea (NCU) was prepared to achieve the controlled release mechanism neces­sary to meet crop requirements. The characterizations of the uncoated urea (UCU) and NCU were done using scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDX), Fourier transform infra-red (FTIR), ref­ractive index (RI) and crushing strength test. To establish the superior behaviour of NCU as a CRF, the results were also compared to the literature data of other CRF, namely phosphate slimes (PCU) and bentonite coated (BCU) with chitosan as a binder. The nutrient release experiments showed that NCU gave a release of 1.03 and 45.03 % at the first day and day 30, respectively. The crushing strength test was carried out for the same size particles, and the results showed that NCU has better mechanical strength as compared to UCU, PCU and BCU.

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How to Cite
[1]
S. O. . Meena, M. Vashishtha, and Meenu, “Neem (Azadirachtaindica) oil coated urea as a novel controlled release fertilizer: Physical and chemical analysis of structure and its nutrient release behaviour: Scientific paper”, J. Serb. Chem. Soc., vol. 89, no. 7-8, pp. 1077–1092, Aug. 2024.
Section
Chemical Engineering

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