Revealing soil‐borne hydrogel effects on soil hydraulic properties using a roughness‐triangular pore space model

Zheng, Wenjuan; Shen, Chongyang; Zeng, Shuaibo; Jin, Yan

doi:10.1002/vzj2.20071

Cited by 4 publications

(4 citation statements)

References 43 publications

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“…Seeds require moisture nearby for lengthy periods of time in order to absorb it; if the moisture is not provided in a timely manner, the seeds will not properly germinate. [ 29 ] However, the cellulose hydrogel can supply the moisture the seeds require, which results in a higher rate of germination for the seeds.…”

Section: Resultsmentioning

confidence: 99%

Cellulose‐Based Hydrogel as a Natural Medium for Paddy Seed Germination

et al. 2023

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Cellulose hydrogel derived from cellulose fibers extracted from printed paper waste is prepared. The hydrogel derived from 3 wt% of the cellulose concentration exhibits a maximum water absorption capacity of 465.5%. The effects of the cellulose hydrogel on the soil moisture are evaluated using four types of soils namely river sand, clayey soil, loamy soil, and gley soil (the wetland soil). The potential application of cellulose‐based hydrogel as an eco‐friendly seed germination media of the paddy seeds under the soil‐less condition is evaluated. This study shows that paddy seeds exhibit a higher seed germination rate of 53% when cellulose hydrogel is used as a seed germination media as compared to seed germination rate ranging from 14% to 35% when various types of soil are used as the germination media. The prepared cellulose hydrogel could be applied as an eco‐friendly and cost‐effective seed germination media to enhance the paddy seeds' germination rate.

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Section: Resultsmentioning

confidence: 99%

Cellulose‐Based Hydrogel as a Natural Medium for Paddy Seed Germination

et al. 2023

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“…Soil treated with hydrogels could cause a shift towards a smaller mean pore size due to the swelling of hydrogels within macropores under saturated conditions, followed by shrinkage as the soil dries. In addition, the water‐absorbing ability of hydrogels could lead to swelling of the soil pore matrix, increasing the space between pores (Zheng et al, 2020). Meanwhile, the effectiveness of γ‐PGA as a binding agent decreases during WD cycles, as it is easily degraded by microorganisms composed of many d / l ‐glutamic acid units (Chen et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Soil macropore characteristics and aggregate stability with poly‐γ‐glutamic acid amendment under wetting–drying cycles

Liu

Shi

Liang

et al. 2023

European J Soil Science

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Soils are typically subjected to multiple wetting–drying (WD) cycles due to irrigation and seasonal climate cycles, which directly impact soil pore structure and soil aggregate stability. Poly‐γ‐glutamic acid (γ‐PGA) is a polymer used to improve soil water holding capacity and plant growth. However, the impact of γ‐PGA on soil pore structure requires further research, particularly under WD cycles. Therefore, we investigated the different amounts of γ‐PGA on soil structure, including soil aggregate stability, macropore (>100 μm) structure characteristics and the relationship between macropore characteristics (equivalent pore diameter, pore shape factor, soil porosity, fractal dimension (FD), soil connectivity and the percentage of aggregate content with particle size larger than 0.25 mm) and soil aggregate stability by structural equation modelling (SEM) under WD cycles. A sandy soil and a loam soil were studied, and amended with γ‐PGA at three different concentrations: 0 (P0), 0.4% (P4) and 0.8% (P8) (w/w, %). Results showed that γ‐PGA amendment increased the mean weight diameter (MWD) and the percentage of aggregate content with particle size larger than 0.25 mm (R0.25) under WD cycles in both sandy and loam soils, while the MWD between P4 and P8 did not differ significantly. As the number of WD cycles increased, soil porosity (TP) increased due to an increase in pores of 100–500 μm. With γ‐PGA added to soil, large microporosity (>1000 μm) increased in sandy soil, but decreased in loam soil. In addition, 8WD cycles also increased the FD (2.6%–4.2%) and pore connectivity (Con) compared with 4WD. Structural equation modelling (SEM) revealed that soil pore characteristics accounted for 74% and 98% of the variation in sandy and loam soils, respectively. TP, FD, Con and R0.25 directly contributed to MWD, according to the SEM. These findings improve our understanding of pore characteristics and aggregate stability, which are key factors influencing soil quality when amended with γ‐PGA during the seasonal WD period.

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“…This review employs the terms superabsorbent, polymer, and hydrogels interchangeably. Superabsorbent hydrogel or polymer is a generic term referring to the three-dimensional (3D) matrixes utilised in medical, engineering, wastewater treatment, food processing, and agriculture [13,53]. The ability of hydrogel polymers to retain water has captured the interest of researchers, hence prompting the investigation into its potential in agriculture.…”

Section: Hydrogelmentioning

confidence: 99%

“…Mucilage is an example of natural hydrogel with excellent surface tension, contact angle, and viscosity [65]. The substance reduces water flow under dry conditions and manipulates pore size distribution into a narrower range [53]. Surface tension is closely related to water holding capacities, which is beneficial for seeds treated with mucilage to germinate at low water potential, high temperatures or under stressful conditions [36].…”

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confidence: 99%

A Systematic Review of the Potential of a Dynamic Hydrogel as a Substrate for Sustainable Agriculture

et al. 2022

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Adopting environmentally friendly or green technology and incorporating new alternative substrates for a sustainable agricultural industry has garnered the attention of numerous researchers. Although super absorbent hydrogels have exhibited great potential, natural hydrogel-based absorbents have gained more interest due to their environmentally safe properties. The sources for the novel green polymer are easily obtained from agricultural wastes, such as polysaccharides, agarose, chitosan, and mucilage, with zero to minimal cost. The polymer also offers several attributes, including water usage and cost efficiencies, versatile application, and increasing plant growth. Furthermore, the polymer can act as a carrier agent and aid in improving the properties of planting mediums. The present review focuses on natural and chemical hydrogel-based polymers. It discusses their potential application in sustainable agriculture and the conservation of ecosystems by providing balanced protection for seeds, plants, and soil. Future perspectives based on previous investigations are also presented.

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Revealing soil‐borne hydrogel effects on soil hydraulic properties using a roughness‐triangular pore space model

Cited by 4 publications

References 43 publications

Cellulose‐Based Hydrogel as a Natural Medium for Paddy Seed Germination

Cellulose‐Based Hydrogel as a Natural Medium for Paddy Seed Germination

Soil macropore characteristics and aggregate stability with poly‐γ‐glutamic acid amendment under wetting–drying cycles

A Systematic Review of the Potential of a Dynamic Hydrogel as a Substrate for Sustainable Agriculture

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