Effects of Bentonite, Hydrogel and Biochar Amendments on Soil Hydraulic Properties from Saturation to Oven Dryness

Mohawesh, Osama; Durner, Wolfgang

doi:10.1016/s1002-0160(17)60426-0

Cited by 42 publications

(32 citation statements)

References 34 publications

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“…The second experiment showed no effect on the volume of leached solution in response to irrigation water EC (Figure 4A). However, there was a difference (p The lower volume leached with hydrogel application indicates that the polymer favors water retention in sandy soil, as reported in other studies (Dorraji et al, 2010;Mohawesh and Durner, 2017;Yu et al, 2017). Even at the highest salinity of irrigation water (4.5 dS m -1 ), the hydrogel absorbed 70 g g -1 (Figure 3), enough to contribute to soil water retention.…”

Section: Methodssupporting

confidence: 64%

Hydrogel composed of potassium acrylate, acrylamide, and mineral as soil conditioner under saline conditions

Costa

Freire

Lourenço

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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Hydrogels have potential as soil conditioners due to their high capacity to retain water and mitigate soil salinity. However, investigations under saline conditions are necessary because there are losses in both water absorption and salinity mitigation depending on the composition of hydrogel and ions involved in salinity. In this work, we studied a commercial hydrogel in two experiments. The first experiment was conducted in the laboratory to evaluate the absorption by the hydrogel of water with electrical conductivity (EC) of 0.5, 1.5, 3.0, and 4.5 dS m -1 , promoted by NaCl. The second experiment was conducted in a greenhouse in a 2 × 4 factorial scheme (with and without hydrogel × EC of the first experiment). Although salinity reduced water absorption by hydrogel by 84 %, the polymer applied in a sandy soil under saline conditions reduced water losses by 58 %. However, hydrogel did not increase the final soil moisture (~ 0.10 g g -1 ). The polymer reduced Na + concentration in leachate from 1,499 to 1,219 mg L -1 at the highest salinity level (4.5 dS m -1 ), but it increased Na + soil availability by 0.1 mg kg -1 in comparison with polymer absence. Hydrogel application increased Na + content in plants from 9 to 13 mg kg -1 at the highest salinity, while K + content was 10 to 16 mg kg -1 lower than that observed without a polymer. Hydrogel 0.07 % (w/w) reduced maize biomass, indicating damage by monovalent ions, compromising the polymer potential under salinity.

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Section: Methodssupporting

confidence: 64%

Hydrogel composed of potassium acrylate, acrylamide, and mineral as soil conditioner under saline conditions

Costa

Freire

Lourenço

et al. 2022

Sci. agric. (Piracicaba, Braz.)

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“…Soil amendments to enhance water holding capacities of a given soil, often in the case of sandy soils, have been investigated in the last decades by several studies [11,15,16]. Some studies also included mathematical modeling of the effects of these soil amendments, including biochar [17,18]. However, most cases involved laboratory experiments, or bare soils without investigating the further impacts of plant growth on biochar amended soils.…”

Section: Introductionmentioning

confidence: 99%

Biochar Amendment Affects Soil Water and CO2 Regime during Capsicum Annuum Plant Growth

et al. 2019

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Recent studies on using soil enhancer material, such as biochar, provide varying results from a soil hydrological and chemical perspective. Therefore, research focusing on soil-biochar-plant interactions is still necessary to enhance our knowledge on complex effects of biochar on soil characteristics. The present study investigated the changes in soil water content (SWC) and soil respiration (belowground CO2 production) over time during the growth of Capsicum annuum (pepper) in pot experiments. Concurrently, we investigated the influence of grain husk biochar with the amount of 0, 0.5%, 2.5%, and 5.0% (by weight) added to silt loam soil. Pepper plants were grown under natural environmental conditions to better represent field conditions, and additional irrigation was applied. SWC among treatments showed minor changes to precipitation during the beginning of the study while plants were in the growing phase. The highest water holding throughout the experiment was observed in the case of BC5.0. CO2 production increased in biochar amended soils during the first few days of the experiments; while the overall cumulative CO2 production was the highest in control and the lowest in BC2.5 treatments. We used the HYDRUS 1D soil hydrological model to simulate changes in SWC, using the control treatment without biochar as a reference data source for model calibration. The simulated SWC dynamics fitted well the measured ones in all treatments. Therefore, the HYDRUS 1D can be an exceptionally valuable tool to predict the hydrological response of different amount of biochar addition to silt loam soil including plant growth.

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“…The moderate increase of 23% in the ET a of P‐1 (OM and hydrogel), and the large increase of 61% for P‐3 (hydrogel) may be explained by the ability of the hydrogel to retain water, which facilitated evaporation, and/or a high K c value generated by transpiration. Mohawesh and Durner (2019) suggested that soil amendments such as hydrogel improved soil water retentivity across the whole moisture saturation range (from total water availability to water stress conditions) and, also, improved the water availability of the sandy soils for a longer period (almost 22 days). The ET a values achieved in P‐1 and P‐3 (P‐1: 3.71–13.18 mm day¯¹; P‐3: 3.34–15.16 mm day¯¹) exceed the maximum values of Green et al .…”

Section: Resultsmentioning

confidence: 99%

Effects of different amendments (organic matter and hydrogel) on the actual evapotranspiration and crop coefficient of turf grass under field conditions^*

Bandenay

Renau‐Pruñonosa

Morell

et al. 2020

Irrigation and Drainage

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The irrigation schedule in arid areas has to be efficient in order to reduce losses due to evaporation and deep infiltration. Irrigation optimization poses the need to establish with precision the value of actual evapotranspiration (ETa), and the crop coefficient (Kc). The water soil availability can be increased using hydrogel and organic matter amendments, and their effects could vary ETa and Kc. The aim of this study was to determine the ETa, and Kc of an experimental site with lysimeters on the Spanish Mediterranean coast cropped with a turf grass variety, Agrostis stolonifera ‐L‐93, under field conditions, and amended with hydrogel and organic matter. Reference evapotranspiration (ET0) was determined from meteorological data (FAO‐Penman‐Monteith equation). ETa was calculated from the water balance, and Kc was obtained by dividing ETa by ET0. Kc was calculated and compared on a yearly, monthly and daily basis. In summer, the differences between amendments become manifest:Unamended lysimeter (100% sand) had Kc values (0.92‐1.16), similar to organic matter amended lysimeter (0.99‐1.17). Maximum and minimum Kc values for the hydrogel amended lysimeters (1.04‐1.52) were higher than those from the other because of the ability of this compound to retain water, which facilitated evapotranspiration. Finally, hydrogel helped to maintain the turf grass quality.

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Effects of Bentonite, Hydrogel and Biochar Amendments on Soil Hydraulic Properties from Saturation to Oven Dryness

Cited by 42 publications

References 34 publications

Hydrogel composed of potassium acrylate, acrylamide, and mineral as soil conditioner under saline conditions

Hydrogel composed of potassium acrylate, acrylamide, and mineral as soil conditioner under saline conditions

Biochar Amendment Affects Soil Water and CO2 Regime during Capsicum Annuum Plant Growth

Effects of different amendments (organic matter and hydrogel) on the actual evapotranspiration and crop coefficient of turf grass under field conditions^*

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Effects of Bentonite, Hydrogel and Biochar Amendments on Soil Hydraulic Properties from Saturation to Oven Dryness

Cited by 42 publications

References 34 publications

Hydrogel composed of potassium acrylate, acrylamide, and mineral as soil conditioner under saline conditions

Hydrogel composed of potassium acrylate, acrylamide, and mineral as soil conditioner under saline conditions

Biochar Amendment Affects Soil Water and CO2 Regime during Capsicum Annuum Plant Growth

Effects of different amendments (organic matter and hydrogel) on the actual evapotranspiration and crop coefficient of turf grass under field conditions*

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Product

Resources

About

Effects of different amendments (organic matter and hydrogel) on the actual evapotranspiration and crop coefficient of turf grass under field conditions^*