1 College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052, China 2 College of Mathematics and Physics, Xinjiang Agricultural University, Urumqi 830052, China
Abstract: The accessibility of water is a critical ecological factor that constrains the sustainable development of agriculture. To mitigate the impact of drought on crop survival rates, nanocomposite hydrogel microspheres (SPL) were successfully synthesized by crosslinking sodium lignosulfonate (SL), sodium alginate (SA), and polyvinyl alcohol (PVA). And they are comprehensively characterized using techniques such as scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FTIR). The influence of SPL hydrogel on soil properties, such as conductivity and pH, was investigated, along with its impact on wheat germination and growth under drought conditions. The results show that the incorporation of lignin provides structural support to the SPL hydrogel, endowing it with a rich porous structure, which resulted in a maximum water absorption capacity of 441.52 g/g, which is higher than that of many other laboratory-prepared hydrogel water-retention materials. The addition of SPL hydrogel has no significant effect on soil conductivity and pH, but it significantly improves soil water retention by approximately 20%. Under drought environment, wheat treated with SPL hydrogel exhibits higher germination rates and growth indicators, including plant height, root length, and fresh weight. This low-cost, rapidly prepared, and highly water-retentive hydrogel shows great potential for application in agricultural soil amelioration.
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2025, Vol. 39 
