Iranian Journal of Irrigation & Drainage

Iranian Journal of Irrigation & Drainage

Investigating the efficiency of composite hydrogels based on chitosan in absorbing and retaining moisture in soil

Document Type : Original Article

Authors
Khashayar Omidi 1
Maryam Dargahi 2
Hadi Ramezani Etedali 3
1 - Master's student in Irrigation and Drainage Engineering, Department of Water Science and Engineering, Imam Khomeini International University, Qazvin, Iran
2 - Associate Professor, Department of Chemistry, Imam Khomeini International University, Qazvin, Iran
3 Dept. of Water Sciences and Engineering, Imam Khomeini International University
Abstract
Considering the global challenges of water scarcity and the need to optimize water use in agriculture, the use of biodegradable hydrogels such as chitosan is a promising solution for increasing water productivity in soil. This study investigates the use of chitosan-based composite hydrogel in soil moisture absorption and retention. In order to investigate the effectiveness of chitosan-based composite hydrogel in soil water retention and moisture absorption, a completely randomized design with five treatments and three replications was conducted. The results showed that the average percentage of weight moisture in irrigation treatments with chitosan hydrogel placed on the surface and depth was about 2.2 and 4.2 percent higher than the irrigation treatment without hydrogel, respectively. Also, in treatments without irrigation, the weight moisture with hydrogel on the surface was 31.1 percent higher than the treatment without hydrogel at the end of the experiment. At the end of the experiment, the weight moisture content of the hydrogel treatment was 0.11, 1.86, and 1.96 percent higher than that of the non-hydrogel treatment in the first, second, and third replicates, respectively. The results showed that under non-irrigated conditions, the use of hydrogel on the soil surface increased air moisture absorption and soil moisture (under dryland conditions). Also, the use of hydrogel (especially in the soil depth) in irrigated treatments increased soil moisture retention, while in the non-hydrogel treatment, soil moisture decreased more rapidly.
Keywords
Hydrogel
superabsorbent polymer
sustainable development
soil moisture
sustainable agriculture
Ahmed, S. and Khan, A. A. Hydrogel-based materials for agriculture applications. Journal of Agricultural and Food Chemistry.
Ahmed, E. M. 2015. Hydrogels as Moisture-Retaining Dressings in Wound Healing. Progress in Polymer Science, https://doi.org/10.1016/j.progpolymsci.2015.02.001.
Chen, L. and Zhang, H. Hydrogel composites for improving soil moisture retention. Industrial & Engineering Chemistry Research.
Chen, X., et al. 2020. Biodegradable chitosan-based hydrogels for agricultural applications: Synthesis and mechanisms. Journal of Agricultural and Food Chemistry. 68(10): 3511-3520.
Hoffman, A. S. 2002. Hydrogels for biomedical applications. Advanced Drug Delivery Reviews, 54(1): 3-12. 
Huang, J., Cheng, Z., Xie, H. and Lou, J. 2014. Effect of quaternization degree on physiochemical and biological activities of chitosan from squid pens. International Journal of Biological Macromolecules. 70:545-550.
Iftime, M., Ailiesei, G., Ungureanu, E. and Marin, L. 2019. Designing chitosan based eco-friendly multifunctional soil conditioner systems with urea controlled release and water retention. Carbohydrate Polymers. 223. https://doi.org/10.1016/j.carbpol.2019.115040
Kazanski, L. and Dobrovski, A. 1992. Hydrogels: A new class of materials for agricultural applications. Journal of Applied Polymer Science, 45(3):1345-1352. 
Kumar, P., Ojha, S. P., Singh, R., Kishtawal, C. M. and Pal, P. K. 2016. Performance of weather research and forecasting model with variable horizontal resolution. Theoretical and Applied Climatology, 126:705-713.‏ https://doi.org/10.1007/s00704-015-1607-7
Kumar, R., et al. 2020. Hydrogel Applications in environmental remediation and water management. Environmental Research, https://doi.org/10.1016/j.envres.2020.109675.
Li J. and Wang Y. Impact of hydrogel application on soil moisture content. Soil Science.
Li, X., et al. 2022. Chitosan hydrogels as efficient water retention agents in soil. Journal of Soil Science and Plant Nutrition, 22(5):1234-1243. 
Li, Y., et al. 2016. Swelling Behavior and Water Retention Capacities of Smart Hydrogels. Journal of Polymer Science, https://doi.org/10.1002/polb.24088.
Manaila, M., et al. 2023. Application of hydrogels in reducing drought stress and preserving soil moisture. Agricultural Water Management, 234:98-108. 
Michalik, R. and Wandzik, I. 2020. A mini-review on chitosan-based hydrogels with potential for sustainable agricultural applications. Polymars. 12(10). https://doi.org/10.3390/polym12102425
Rufato, F., et al. 2019. Chitosan-based hydrogels: Synthesis, properties and applications. International Journal of Biological Macromolecules, 130:369-380.
Sun, L., Du, Y. and Shi, X. 2006. A new approach to chemically modified carboxymethyl chitosan and study of its moisture‐absorption and moisture‐retention abilities.
Wang X. and Liu C. Hydrogel polymers for water retention in soil. Soil Science Society of America Journal.
Zhang, X., et al. 2021. Application of hydrogels in agriculture to improve water retention and soil moisture. Agricultural Water Management, https://doi.org/10.1016/j.agwat.2021.107689.
Zhi, S. 2002. Moisture-absorption and moisture-retention capacity of N-carboxybutyl-chitosan.
Iranian Journal of Irrigation & Drainage
Volume 19, Issue 2 - Serial Number 111
May and June 2025
Pages 315-323