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Potential of superabsorbent hydrogels to improve agriculture under abiotic stresses
- Source :
- Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual), Universidade de São Paulo (USP), instacron:USP
- Publication Year :
- 2021
- Publisher :
- Elsevier, 2021.
-
Abstract
- Hydrogels are a promising management option to increase the efficiency of water use in agriculture in arid and semi-arid regions. However, abiotic factors may affect hydrogel efficacy. The effect of abiotic stress on the swelling and residual acrylamide in hydrogels was evaluated. The treatments were three hydrogels (A, B and C), four temperatures (20, 30, 40 and 65 °C) and two salinities (0.003 and 3.0 dS m−1). The swelling degree and the residual acrylamide concentration of the hydrogels were measured. Data were analyzed with univariate and multivariate statistics. The swelling order of hydrogels under low salinity was A>C>B; at high salinity was B>A>C. All hydrogels presented swelling reduction at high salinity, with swelling reductions in A and C of 97% and 85%, respectively, while B presented a swelling reduction of 37% at 20 °C and greater than 89% at higher temperatures. Hydrogel B achieved good swelling under saline conditions, but only at 20 °C. Thus, the temperature tolerance of this hydrogel should be improved so it can be used to improve water use efficiency in regions with high temperatures and salinity levels. Residual acrylamide levels of hydrogels decreased by 95% over 30 days, being safe for agricultural applications.
- Subjects :
- 0106 biological sciences
010504 meteorology & atmospheric sciences
medicine.medical_treatment
macromolecular substances
010603 evolutionary biology
01 natural sciences
complex mixtures
chemistry.chemical_compound
medicine
Food science
Water-use efficiency
Saline
Ecology, Evolution, Behavior and Systematics
0105 earth and related environmental sciences
Earth-Surface Processes
Abiotic component
Soil science
Ecology
Abiotic stress
technology, industry, and agriculture
Water use efficiency
Salinity
chemistry
POLÍMEROS (QUÍMICA ORGÂNICA)
Soil conservation
Acrylamide
Self-healing hydrogels
Swelling
medicine.symptom
Anionic co-polymers
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual), Universidade de São Paulo (USP), instacron:USP
- Accession number :
- edsair.doi.dedup.....d1bc27f96fabb9642a931f5d426ca644