PJB-2021-679
Magnetic nanoparticles-grafted-poly (acrylic acid) as a super-hydrogel composite: Preparation, characterization and application in agriculture.
Tamer Mohamed Salem
Abstract
Owing to swelling properties and easily fabrication, hydrogels are employed intensively in agricultural application. Herein, hydrogel composite of acrylic acid or sodium acrylate co-polymer cross linked with magnetic nanoparticle (HG-MNP) were synthesised and characterized by FTIR, TGA, BET and TEM techniques as compared with the hydrogel (HG). A pot experiment was conducted to evaluate the effects of HG and HG-MNP on crop productivity, quality and water-use efficiency of Eggplant under different irrigation and mineral fertigation doses. The results indicated that incorporation of magnetic nanoparticle (MNP) into hydrogel matrix can significantly improve both the thermal stability and the swelling ratio of the hydrogel samples. The results of pot experiment conducted on Eggplant treated with the modified HG showed a significant increase in the studied morphological characteristics including plant high, stem diameter, number of branches, leaves, fruits, chlorophyll concentrations and crop yield comparing to the control. This was attributed to the higher swelling ratio of HG-MNP and the higher adsorption ratios of nutrients than HG, which ensured an adequate supply of water and nutrients throughout the growth period of the crop. These results indicated that the integration of HG-MNP with is beneficial for agricultural application especially under water stress.
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