Radiation cross-linked ultra-absorbent hydrogel to rationalize irrigation water and fertilizer for maize planting in drought conditions.

Autor: Ghobashy MM; Radiation Research of Polymer Chemistry Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), P.O. Box 8029, Cairo, Egypt. Electronic address: mohamed.ghobashy@eaea.org.eg., Amin MA; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., Ismail MA; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., Nowwar AI; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., El-Diehy MA; Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt., Gayed HM; Radiation Research of Polymer Chemistry Department, National Centre for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (EAEA), P.O. Box 8029, Cairo, Egypt. Electronic address: hanygayed83@gmail.com.
Jazyk: angličtina
Zdroj: International journal of biological macromolecules [Int J Biol Macromol] 2023 Dec 01; Vol. 252, pp. 126467. Date of Electronic Publication: 2023 Aug 26.
DOI: 10.1016/j.ijbiomac.2023.126467
Abstrakt: The study addresses the potential negative impacts of climate change on water resources, specifically irrigation water for crops. The radiation technique produces the biomaterial hydrogel as a soil conditioner by polymerizing hydroxy ethyl cellulose/acrylamide (HEC/AAm) at various irradiation doses and copolymer concentrations. A maximum swelling of 23.4 g/g is attained by (HEC/PAAm) hydrogel at 1/7.5 ratio, prepared by 10 kGy gamma irradiation. The study introduces a new class of ultra-absorbent hydrogel (UAH) to address the low swelling limitation for soil conditioner applications. The alkaline hydrolysis treatments with NaOH, LiOH, and KOH enhance the water absorbency of (HEC/PAAm) hydrogel, with the highest capacity of 1220 g/g achieved by the KOH treatment, surpassing NaOH (622 g/g) and LiOH (540 g/g). The cumulative release of fertilizers from the UAH sample shows a slow and controlled release behavior. Urea takes 22 days to reach 100 % release. The UAH demonstrates water retention for 28 days, improving the growth of Zea mays L. at drought stress levels of 0 %, 25 %, 50 %, and 100 %, revealing an increase in shoot length by 16 %, 19 %, 24 %, and 20 %, respectively. Also, UAH increased the contents of chlorophyll a, b, a + b, and carotenoid on maize plant leaves compared to the control sample.
Competing Interests: Declaration of competing interest We confirmed that:
(Copyright © 2023. Published by Elsevier B.V.)
Databáze: MEDLINE
Externí odkaz: