Effect of Water Quality and Temperature on the Efficiency of Two Kinds of Hydrophilic Polymers in Soil

Dehkordi, Davoud Khodadadi

doi:10.2175/106143017x14839994523389

Cited by 7 publications

(4 citation statements)

References 16 publications

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“…Our results suggest that SAP can improve soil moisture, reduce the diurnal temperature variation of soil [10,11], and prolong the duration suitable for the photosynthesis of maize leaves by providing sufficient soil moisture. For example, whilst the soil temperature of the SAP treatment groups was higher than that of the CK group in the morning and evening, it was lower at 13:00, thereby greatly extending the photosynthesis time by reducing the leaf surface temperature.…”

Section: Effects Of Sap On the Photosynthetic Rate And Yield Of Cropsmentioning

confidence: 87%

“…The soil surface (0-20 cm) temperature affects plant growth, soil formation and properties, and the movement of soil water and soil air [9][10][11]. Groundwater was used for irrigation in the study area.…”

Section: Effects Of Sap On Soil Surface Temperaturementioning

confidence: 99%

“…Therefore, after soil irrigation, due to insufficient space for moisture absorption and expansion, excessive SAP application could reduce soil permeability and temperature transmission flux [15,16]. On this basis, it is concluded that the SAP dosage should be carefully adjusted according to the soil texture, soil particle size, regional climate characteristics [7,11,44], and SAP type [6,7,22].…”

Section: Contribution Of Sap To Soil Remediation and Crop Growthmentioning

confidence: 99%

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Effects of Super-Absorbent Polymer on Soil Remediation and Crop Growth in Arid and Semi-Arid Areas

et al. 2020

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The water-retaining and yield-increasing capacity of super-absorbent polymer (SAP) are essential for soil remediation in arid and semi-arid areas. Therefore, it is of great significance to investigate the influencing factors and mechanisms of SAP effects on soil environments and crop growth for the precise management of agricultural water-saving irrigation. In this study, we adopted SAP as a soil conditioner and monitored changes in soil temperature, photosynthetic rate, leaf transpiration rate, chlorophyll, crop growth indexes (plant height, stem diameter, leaf area index, dry matter accumulation), and yield under different SAP doses during the growth stage of maize, on the basis of which the improvement mechanism of SAP in arid and semi-arid soil was analyzed. The results demonstrated the following: (1) 45 kg/hm2 of SAP application could increase the temperature of the soil layer, effectively reduce the diurnal temperature variation of the soil surface, and promote the stable growth of maize; (2) when different SAP doses were applied, the leaf surface temperature of maize increased by 0.95 °C on average. In particular, when 135 kg/hm2 of SAP was applied, the leaf surface temperature increased by 1.55 °C; (3) SAP could promote the photosynthetic rate of maize. In addition, the plant height, leaf area index, and dry matter accumulation of maize gradually increased with an increasing amount of SAP; (4) the application of SAP not only increased the grain row number, ear row number, and average 100-seed weight, but also increased the crop yield by nearly 6%. The application of SAP demonstrated a comprehensive utility (redistribution of soil water and temperature, synergy between SAPs and plants), which suggests that the most basic goal, to ensure socio-economic and ecological sustainability in dryland systems, was obtained.

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Section: Effects Of Sap On the Photosynthetic Rate And Yield Of Cropsmentioning

confidence: 87%

Section: Effects Of Sap On Soil Surface Temperaturementioning

confidence: 99%

Section: Contribution Of Sap To Soil Remediation and Crop Growthmentioning

confidence: 99%

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Effects of Super-Absorbent Polymer on Soil Remediation and Crop Growth in Arid and Semi-Arid Areas

et al. 2020

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“…At present, soil amendments consist of three main types: artificial types using polymers, natural types using organic and inorganic substances, and biological types using mycorrhizae [7][8][9][10][11]. Due to the good water absorption and water release characteristics of soil amendments, the proportions of water, heat and gas in the soil are effectively optimized and adjusted to affect the moisture status, bulk density, aggregate structure and strength, especially soil nutrients [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effects of Aqua-Dispersing Nano-Binder on Clay Conductivity at Different Temperatures

Zhou

Huang

et al. 2019

Sustainability

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Soil nutrients are the basis of ecological remediation. Soil amendments can form a reticular membrane structure on the soil surface to increase nutrient storage and alleviate nutrient imbalances, and are affected by the environmental temperature. At present, the qualitative evaluation of the effect of soil amendment is mainly based on vegetative growth. However, with the increasing use of soil amendments, how to conveniently and quantitatively evaluate the impact of soil amendments on ecological restoration under different temperature conditions from the perspective of soil urgently needs to be solved. Therefore, a new soil amendment named aqua-dispersing nano-binder (ADNB) and silty clay that is commonly used for ecological restoration in South China were used as research subjects, and the important soil nutrient storage capacity—soil conductivity index—was used as the starting point to find solutions to the above problems. We independently developed a multifunctional instrument to measure the soil amendment concentration. Clay conductivity measurements were used by adding different concentrations of ADNB within the range of 0 to 50 °C, and the mechanism by which temperature and ADNB affect the conductivity of clay was revealed. In addition, the quantitative relationship between the clay conductivity, ambient temperature and concentration of ADNB was elucidated. According to the growth conditions of melinis minutiflora and pigeon pea under different concentrations of ADNB, the optimal ADNB concentration needed to improve ecological restoration was obtained, which provided a new way to evaluate the effects of the large-scale use of soil modifiers on ecological restoration.

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Recent Advances, Applications, and Challenges in Superabsorbent Polymers to Support Water Sustainability

Batara,

Steven,

Mulyana

et al. 2024

J of Applied Polymer Sci

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Superabsorbent polymers (SAPs) can absorb and retain water thousands fold their weight, so it is believed can overcome water depletion issues. However, the applications are dominantly found in daily consumer goods, while still limited especially in agricultural and environmental sectors. This review aims to provide insights into the preparation, synthesis, key properties, recent applications, and challenges of SAPs targeted to support water sustainability. The resources for SAPs synthesis are cellulose, chitin, chitosan (as natural‐based), and polyacrylate (as synthetic‐based). Likewise, semi‐synthetic SAPs have also been explored by graft copolymerization and crosslinking between natural and synthetic resources. Several key properties in SAPs are absorption capacity, biodegradability, antibacterial capabilities, swelling properties, and grain size. It is found that cellulose‐based SAPs have high water absorption capacity and biodegradability, chitosan‐based SAPs are superior in biodegradability and antibacterial capabilities, and polyacrylate‐based SAPs are eminent in water absorption capacity. As a further recommendation, cellulose‐based SAPs from plants or seaweeds can be a solution to replace synthetic polymer materials that are not environmentally friendly while supporting sustainable agricultural needs. The properties of SAPs, including salt resistance, should also be rectified by physicochemical modifications to overcome dynamic agricultural conditions by means of soil moisture, soil salinity, and microclimate alterations.

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Effect of Water Quality and Temperature on the Efficiency of Two Kinds of Hydrophilic Polymers in Soil

Cited by 7 publications

References 16 publications

Effects of Super-Absorbent Polymer on Soil Remediation and Crop Growth in Arid and Semi-Arid Areas

Effects of Super-Absorbent Polymer on Soil Remediation and Crop Growth in Arid and Semi-Arid Areas

Effects of Aqua-Dispersing Nano-Binder on Clay Conductivity at Different Temperatures

Recent Advances, Applications, and Challenges in Superabsorbent Polymers to Support Water Sustainability

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