Superabsorbent Hydrogel Composite Based on Starch/Rice Husk Ash as a Soil Conditioner in Melon (Cucumis melo L.) Seedling Culture

Vasconcelos, Maria Viviane Lisboa de; Gomes, Raelle F.; Sousa, Antônio A. L.; Moreira, Francisco José Carvalho; Rodrigues, Francisco H. A.; Fajardo, André R.; Neto, Luís G. Pinheiro

doi:10.1007/s10924-019-01593-x

Cited by 31 publications

(17 citation statements)

References 29 publications

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“…Moreover, a poly(acrylamide-co-acrylic acid)/silvercoated superabsorbent hydrogel nano-composite demonstrated excellent water-retention capacity, which could be valuable in rainfed agriculture [68]. This aligns with previous studies by de Vasconcelos and co-workers, as the analysis of melon seedling growth was improved due to superabsorbent hydrogel composite contribution [69].…”

Section: Hydrogel As a Potting Mediumsupporting

confidence: 87%

“…Hydrogel is in the trend of being used as a potting medium that could be employed to increase the yield of crops and provide nutrients [75][76][77]. Likewise, hydrogel is also considered a soil conditioner, due to its effects on structure and to infiltrate water, minimising soil erosion and water run-off, decreasing soil compaction, supporting plant growth performance when less irrigated, and delaying dissolution of fertilisers to enable nutrient retention [63,69]. Various types of hydrogel could be tailor made to be utilised in soilless agriculture [78].…”

Section: Alternative To Soilless Agriculturementioning

confidence: 99%

“…The presence of hydrogel only impacted the plant roots' size. In the second experiment, clay soil treated with hydrogel led to 10% greater seedling height except for 1% hydrogel compared to the non-conditioned soils [69]. Numerous studies reporting on the application of hydrogel for leafy vegetable growth [60,102,109] studied choy sum, a leafy vegetable using superabsorbent hydrogel derived from a soy product's manufacturing waste, called okara, as a soil supplement.…”

Section: Efficient Irrigation and Fertiliser Applicationmentioning

confidence: 99%

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Hydrogel Application in Urban Farming: Potentials and Limitations—A Review

et al. 2022

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Urban agriculture plays a vital role in ensuring the self-sufficiency of a great variety of fresh vegetables and nutrients. It promotes a sustainable food system as well as reducing the dependency on imports for the growing population. Urban farming has made it possible for agriculture practices to be implemented anywhere at any time in a sophisticated way. Hydrogel has been introduced in urban agriculture in the past few decades. However, the application of hydrogel in urban agriculture is still being explored in terms of hydrogel types, structure, physical and chemical properties, change due to external factors, and its suitability for different plant species. This review discusses the potentials and limitations of hydrogel in different application conditions. We present the state of knowledge on hydrogel production and crosslinking methods, hydrogel characteristics, water absorption and release mechanisms of hydrogel, hydrogel advantages and limitations, and current and future applications in urban farming.

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Section: Hydrogel As a Potting Mediumsupporting

confidence: 87%

Section: Alternative To Soilless Agriculturementioning

confidence: 99%

Section: Efficient Irrigation and Fertiliser Applicationmentioning

confidence: 99%

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Hydrogel Application in Urban Farming: Potentials and Limitations—A Review

et al. 2022

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“…Among various methods for improving agrophysical properties of soils, the use of water‐soluble and water‐swelling polymers is being actively discussed 1–3 . When added to soil, water‐soluble polymers increase the fraction of agronomically valuable soil particles with a 1–5 mm size and decrease the fraction of dusty soil particles with size of <0.25 mm 4–6 .…”

Section: Introductionmentioning

confidence: 99%

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Smagin

Панова

Ilyasov

et al. 2021

J of Applied Polymer Sci

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New synthetic soil conditioners for anti‐erosion protection of soils in the form of microgel copolymers of N‐isopropylacrylamide and acrylic acid (PAA#) and their interpolyelectrolyte complexes (IPEC#) with different surface charges are tested for optimization of water retention and porous structure in two samples of soil substrates. Water retention curves (WRCs) are used as a fundamental thermodynamic indicator of water holding capacity in soil substrates treated by new polymeric materials. Soil‐hydrological constants, as well as specific surface parameters and pore distribution curves are calculated from the WRCs using the van Genuhten model and the Voronin method in the author's modification. PAA# and anionic IPEC# with high swelling degree at a dose of 1% (by weight) increase field water capacity, available soil water range and specific surface area by 5–6 times for quartz sand, along with reorganizing its structure towards micropore dominance. For loamy sand, the same treatment was less effective with a twofold increase in field moisture capacity, double or triple increase of specific surface area, and an almost constant range of available soil water due to the strong increase of wilting point parameter. Weakly swelling linear polyacrylic acid and cationic IPEC# did not significantly affect properties of both mineral substrates.

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“…Nonrenewable synthetic petroleum-based superabsorbent polymer materials were commonly used in early studies in agricultural areas, and there is a trend to develop more sustainable natural and biobased materials, especially value-added materials derived from waste. ,− Many studies have been reported on the synthesis of superabsorbent polymer hydrogels using different natural and biobased precursors like starch, husk rice ash, guar gum, carrageenan, gum Arabic, wheat straw, etc. − The hydrogels have been applied as soil conditioners to improve the properties of different types of soils.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Okara-Poly(acrylic acid) Superabsorbent Hydrogels for Enhancing Vegetable Growth through Improving Water Holding and Retention Properties of Soils

Zhu

Tan

Song

et al. 2022

ACS Food Sci. Technol.

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Okara (Ok), a byproduct of soybean milk and curd production, is a suitable candidate for developing biobased renewable materials. Herein, we report the synthesis and characterization of okara-poly(acrylic acid) (Ok-PAA) superabsorbent hydrogels by grafting and cross-linking PAA on fresh okara. The dried Ok-PAA hydrogel granules in different sizes were added into three types of soils, i.e., lawn sand, mixed soil, and potting mix, as a soil supplement. Overall, the hydrogel supplementation could improve the water holding and retention capacities much more significantly for sand and mixed soil than potting mix. Further, the hydrogels were evaluated for enhancing the growth of a green Asian leafy vegetable, the Brassica rapa subsp. chinensis var. parachinensis (choy sum) in the three soils. In mixed soil, the effect of the hydrogels for enhancing the vegetable growth and reducing the water leaching was particularly significant. Therefore, the Ok-PAA hydrogels are promising for agricultural and farming applications where the soil texture is similar to mixed soil.

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Superabsorbent Hydrogel Composite Based on Starch/Rice Husk Ash as a Soil Conditioner in Melon (Cucumis melo L.) Seedling Culture

Cited by 31 publications

References 29 publications

Hydrogel Application in Urban Farming: Potentials and Limitations—A Review

Hydrogel Application in Urban Farming: Potentials and Limitations—A Review

Water retention in sandy substrates modified by cross‐linked polymeric microgels and their complexes with a linear cationic polymer

Synthesis and Characterization of Okara-Poly(acrylic acid) Superabsorbent Hydrogels for Enhancing Vegetable Growth through Improving Water Holding and Retention Properties of Soils

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