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Article Abstract
The purpose of this research was to develop a hydrogel-based slow-release fertilizer for wheat cultivation. A new polyvinyl alcohol (PVA)/sodium alginate (SA)/humic acid (HA)/citric acid (CA) (PSHC) hydrogel composite was synthesized, using a liquid-state crosslinking method, with citric acid serving as the crosslinker. Then, the PSHCU-hydrogel was formed by incorporating urea with PSHC-hydrogel. The samples were analyzed using FTIR, FESEM, and EDX, confirming the hydrogel network's formation through ester linkages, and successful urea incorporation. PSHCU-hydrogel's water absorption and retention, biodegradation, and urea release in soil and water were examined. The highest amount of water absorbed by PSHCU-hydrogel after 24 h at pH 10 was 945.16 %. The urea release rate in soil was 80.77 % and 90.84 % for the PSHCU- and PSCU-hydrogels over 30 days, respectively. The PSHCU-hydrogel's effects on wheat plants' development and yield were investigated. Incorporating humic acid improved PSHCU-hydrogel's slow-release characteristics, and enhanced plant growth (p < 0.05) and yielded 4199 kg hm. Thus, the PSHCU-hydrogel showed potential to be a valuable fertilizer for wheat cultivation.
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| http://dx.doi.org/10.1016/j.ijbiomac.2025.144295 | DOI Listing |
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