Eco-friendly whey/polysaccharide-based hydrogel with poly(lactic acid) for improvement of agricultural soil quality and plant growth

Duřpeková, Silvie; Bergerová, Eva Domincová; Hanusova, Dominika; Dusankova, Miroslava; Sedlařík, Vladimír

doi:10.1016/j.ijbiomac.2022.05.053

Cited by 27 publications

(21 citation statements)

References 48 publications

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“… Shankarappa et al (2020) found that hydrogel application increased pod and seed yield in lentils. It has been determined that hydrogel applications have a positive effect on the growth of Raphanus sativus and Phaseolus vulgaris vegetables in arid conditions and enable these plants to have longer life spans ( Durpekova et al, 2022 ). Hydrogel applications increased leaf area, as well as the yield of leafy vegetables by 35% to 60% and encouraged the development of Brassica rapa subsp chinensis var parachinensis ( Zhu et al, 2022a , 2022b ).…”

Section: Resultsmentioning

confidence: 99%

Hydrogels improved parsley (Petroselinium crispum(Mill.) Nyman) growth and development under water deficit stress

Karipçin¹

2023

PeerJ

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Water scarcity is one of the most pressing problems facing countries in the semi-arid and arid regions of the world. Data predicts that by 2030, global water consumption will increase by 50%, leading to severe water shortages. Today, agricultural production consumes more than 70% of fresh water in many parts of the world, increasing the pressure on water scarcity. For these reasons, agricultural production models and approaches should be developed to reduce water consumption. One developed approach is the use of hydrogel to reduce water consumption and have a positive effect on plant growth. This study investigated the use of hydrogels as chemical components that can be used in water shortage conditions and against the expected water scarcity. Parsley was used as the model organism. The method used was as follows: two different water treatments (50% and 100%) and four different hydrogel concentrations (0%, 50%, 75%, and 100%) were applied, and root width and length, leaf width and length, main stem length, and the number of tillers were measured. According to the results, while no improvement was observed in the plants with 100% hydrogel concentration, the best results were obtained from 50% hydrogel application. The results obtained from 75% hydrogel application were found to be higher than those of 100% hydrogel but lower than 0% hydrogel application. With 50% hydrogel (water-restricted), all plant growth parameters were higher compared to the plants with 100% (full irrigation) water application. It was determined that the average value of the I1 (50%) irrigation was the highest (3.6), and the average value of the I2 (100%) irrigation (2.4) was the lowest. It was determined that the highest average value (6.2) in all measured traits was the average value of the H1 (50%) application, and the lowest average value (0.0) was in the H3 hydrogel applications (100%). In conclusion, this study suggested that hydrogel application is beneficial on a large scale, can optimize water resource management for higher yields in agriculture, and has a positive effect on agricultural yield under water deficit stress.

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Section: Resultsmentioning

confidence: 99%

Hydrogels improved parsley (Petroselinium crispum(Mill.) Nyman) growth and development under water deficit stress

Karipçin¹

2023

PeerJ

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“…This behavior (Gibbs Donnan effect) is a consequence of a charge imbalance between the inner and outer environments of the hydrogel . In the soil extract, the concentration gradient of ion species between the hydrogel and the external solution was lower than in water medium; thus, the water uptake decreased …”

Section: Resultsmentioning

confidence: 99%

“…The swelling capacity of hydrogels was evaluated in deionized water and in a soil aqueous extract (pH 7.05, EC = 239 μS cm −1 ) by the gravimetric method. The soil extract was prepared according to Durpekova et al 35 Commercial garden soil (Happy Flower-prepared potting soil mix) was autoclaved at 120 °C and 0.12 MPa for 40 min.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…50 In the soil extract, the concentration gradient of ion species between the hydrogel and the external solution was lower than in water medium; thus, the water uptake decreased. 35 To further examine the swelling mechanism of the hydrogels, experimental data were fitted to the power law model. For cylinder-shaped gels, when the n value is less than 0.45, the solvent uptake mechanism is governed by Fickian diffusion, and a n value between 0.45 and 0.89 indicates that the process follows an anomalous solvent uptake mechanism.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

“…57 Therefore, the use of urea-controlled release systems can be a potential solution to the problem of urea loss in agricultural crops. 27,35,59 Figure 10 shows the urea release kinetics from AC12 and GA12 hydrogels in a soil aqueous extract at room temperature.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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Physically and Chemically Cross-Linked Poly(vinyl alcohol)/Humic Acid Hydrogels for Agricultural Applications

Torres-Figueroa,

de los Santos-Villalobos,

Rodríguez-Félix

et al. 2023

ACS Omega

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The preparation method of hydrogels has a significant effect on their structural and physicochemical properties. In this report, physically and chemically cross-linked poly(vinyl alcohol) (PVA) networks containing humic acid (HA) were alternatively prepared by autoclaving (AC) and through glutaraldehyde (GA) addition, respectively, for agricultural purposes. PVA/HA hydrogels were comparatively characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, mechanical assays, scanning electron microscopy, swelling kinetics measurements, and water retention tests in soil. AC hydrogels showed a more homogeneous porous microstructure, higher swelling levels, and a better capacity to preserve the humidity of soil than those obtained by adding GA. Both PVA/HA hydrogels exhibited no phytotoxicity on cultivation trials of Sorghum sp., but the plant growth was promoted with the GA-cross-linked network as compared to the effect of the AC sample. The release behavior of urea was modified according to the preparation method of the PVA/HA hydrogels. After 3 days of sustained urea release, 91% of the fertilizer was delivered from the AC hydrogel, whereas a lower amount of 56% was released for the GA-cross-linked hydrogel. Beyond the advantages of applying PVA/HA hydrogels in the agricultural field, an appropriate method of preparing these materials endows them with specific properties according to the requirements of the target crop.

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Biodegradability of bio‐based and synthetic hydrogels as sustainable soil amendments: A review

Adjuik

Nokes

Montross

2023

J of Applied Polymer Sci

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Superabsorbent polymers (SAPs), sometimes known as hydrogels, have been proposed as soil amendments to enhance soil water management. But the performance of SAPs as soil amendments depends on their stability in soil. Bio‐based SAPs have been praised as environmentally sustainable due to their apparent fast biodegradation relative to synthetic SAPs. But the fast biodegradation of bio‐based SAPs may come at a cost to their long‐term performance for repeated absorption and release of water in the soil. The purpose of this review is to (i) concisely summarize the methods and mechanisms involved in the biodegradation of different bio‐based and synthetic SAPs, (ii) critically review studies conducted on the biodegradability of bio‐based and synthetic SAPs when used as soil amendments, and (iii) discuss the implications of the biodegradability of bio‐based and synthetic SAPs on their physical properties and stability in soil and (iv) identify potential research directions. Understanding the biodegradability of synthetic compared to bio‐based SAPs and their advantages and disadvantages as soil amendments is important to researchers and farmers when choosing a specific type of SAPs as an agricultural soil amendment.

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Eco-friendly whey/polysaccharide-based hydrogel with poly(lactic acid) for improvement of agricultural soil quality and plant growth

Cited by 27 publications

References 48 publications

Hydrogels improved parsley (Petroselinium crispum(Mill.) Nyman) growth and development under water deficit stress

Hydrogels improved parsley (Petroselinium crispum(Mill.) Nyman) growth and development under water deficit stress

Physically and Chemically Cross-Linked Poly(vinyl alcohol)/Humic Acid Hydrogels for Agricultural Applications

Biodegradability of bio‐based and synthetic hydrogels as sustainable soil amendments: A review

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