Assessment of soil salinity indexes using electrical conductivity sensors

Bañón, S.; Álvarez, Susana Álvarez; Bañón, Daniel; Ortuño, M.F.; Sánchez-Blanco, María Jesús

doi:10.1016/j.scienta.2021.110171

Cited by 27 publications

(18 citation statements)

References 36 publications

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“…The pH of the soil and the electrical conductivity (EC) method were used to evaluate soil salinity ( Bañón et al, 2021 ), The percentage of weight loss of organic matter on ignition (W SOI %) method was used to determine the soil organic matter (OM) content ( Nakhli et al, 2019 ). The obtained samples were air-dried in the shade and passed through a 60-mesh standard sieve before analysis.…”

Section: Methodsmentioning

confidence: 99%

Effects of Salinity on the Biodegradation of Polycyclic Aromatic Hydrocarbons in Oilfield Soils Emphasizing Degradation Genes and Soil Enzymes

Yang

et al. 2022

Front. Microbiol.

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The biodegradation of organic pollutants is the main pathway for the natural dissipation and anthropogenic remediation of polycyclic aromatic hydrocarbons (PAHs) in the environment. However, in the saline soils, the PAH biodegradation could be influenced by soil salts through altering the structures of microbial communities and physiological metabolism of degradation bacteria. In the worldwide, soils from oilfields are commonly threated by both soil salinity and PAH contamination, while the influence mechanism of soil salinity on PAH biodegradation were still unclear, especially the shifts of degradation genes and soil enzyme activities. In order to explain the responses of soils and bacterial communities, analysis was conducted including soil properties, structures of bacterial community, PAH degradation genes and soil enzyme activities during a biodegradation process of PAHs in oilfield soils. The results showed that, though low soil salinity (1% NaCl, w/w) could slightly increase PAH degradation rate, the biodegradation in high salt condition (3% NaCl, w/w) were restrained significantly. The higher the soil salinity, the lower the bacterial community diversity, copy number of degradation gene and soil enzyme activity, which could be the reason for reductions of degradation rates in saline soils. Analysis of bacterial community structure showed that, the additions of NaCl increase the abundance of salt-tolerant and halophilic genera, especially in high salt treatments where the halophilic genera dominant, such as Acinetobacter and Halomonas. Picrust2 and redundancy analysis (RDA) both revealed suppression of PAH degradation genes by soil salts, which meant the decrease of degradation microbes and should be the primary cause of reduction of PAH removal. The soil enzyme activities could be indicators for microorganisms when they are facing adverse environmental conditions.

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Section: Methodsmentioning

confidence: 99%

Effects of Salinity on the Biodegradation of Polycyclic Aromatic Hydrocarbons in Oilfield Soils Emphasizing Degradation Genes and Soil Enzymes

Yang

et al. 2022

Front. Microbiol.

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“…The manufacturer suggests the application of the Hilorst model [19] as a feasible approach to convert bulk EC directly measured by the sensor into ECp, the latter representing a salinity index closer to the salinity felt by plants. Bañón et al [43] observed that ECp obtained by Hilorst model [19] could be considered a reliable salinity index when substrate moisture is maintained constant, especially at high values. In this perspective, the findings of our study, where sensor-based irrigation strategy consisted in maintaining constant substrate VWC levels, confirm that ECp trends monitoring is suitable to be used as a tool to control fertilization status during growing cycles of plants in soilless growing media conditions.…”

Section: Water Consumption Crop Performance Plant Physiology and Chem...mentioning

confidence: 99%

Sensor-Based Irrigation Reduces Water Consumption without Compromising Yield and Postharvest Quality of Soilless Green Bean

et al. 2021

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Real-time monitoring of substrate parameters in the root-zone through dielectric sensors is considered a promising and feasible approach for precision irrigation and fertilization management of greenhouse soilless vegetable crops. This research investigates the effects of timer-based (TIMER) compared with dielectric sensor-based irrigation management with different irrigation set-points [SENSOR_0.35, SENSOR_0.30 and SENSOR_0.25, corresponding to substrate volumetric water contents (VWC) of 0.35, 0.30 and 0.25 m3 m−3, respectively] on water use, crop performance, plant growth and physiology, product quality and post-harvest parameters of soilless green bean (Phaseolus vulgaris L., cv Maestrale). In SENSOR treatments, an automatic system managed irrigation in order to maintain substrate moisture constantly close to the specific irrigation set-point. The highest water amount was used in TIMER treatment, with a water saving of roughly 36%, 41% and 47% in SENSOR_0.35, SENSOR_0.30 and SENSOR_0.25, respectively. In TIMER, the leaching rate was ≈31% of the total water consumption, while little leaching (<10%) was observed in SENSOR treatments. TIMER and SENSOR_0.35 resulted in similar plant growth and yield, while irrigation set-points corresponding to lower VWC values (SENSOR_0.30 and SENSOR_0.25) resulted in inadequate water availability conditions and impaired the crop performance. The study confirms that rational sensor-based irrigation allows to save water without compromising anyhow the product quality. In SENSOR irrigation management, in fact, especially in the case of optimal water availability conditions, it was possible to obtain high quality pods, with fully satisfactory characteristics during storage at 7 °C for 15 days.

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“…Plug sensors methods are not preferred here since they are highly compatible with homogenous solutions (dos Santos Sousa et al, 2021 ; Visconti & de Paz, 2016 ). Therefore, a laboratory-oriented method was proposed in basis of pour-through technique (Altland, 2021 ; Bañón et al, 2021 ; Palimąka, Pietrzyk, & Sak, 2016 ) to find the simultaneous EC magnitudes of test specimens.…”

Section: Research Methodology and Materialsmentioning

confidence: 99%

Feasibility study for estimating optimal substrate parameters for sustainable green roof in Sri Lanka

Kader

Spalević

Dudić

2022

Environ Dev Sustain

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In twenty-first century buildings, green roof systems are envisioned as great solution for improving Environmental sustainability in urban ecosystems and it helps to mitigate various health hazards for humans due to climatic pollution. This study determines the feasibility of using five domestic organic wastes, including sawdust, wood bark, biochar, coir, and compost, as sustainable substrates for green roofs as compared to classical Sri Lankan base medium (fertiliser + potting mix) in terms of physicochemical and biological parameters associated with growing mediums. Comprehensive methodologies were devised to determine the thermal conductivity and electric conductivity of growing mediums. According to preliminary experimental results, the most suitable composition for green roof substrates comprised 60% organic waste and 40% base medium. Sawdust growing medium exhibited the highest moisture content and minimum density magnitudes. Biochar substrate was the best performing medium with the highest drought resistance and vegetation growth. The wood bark substrate had the highest thermal resistance. Growing mediums based on compost, sawdust, and coir produced the best results in terms of nitrate, phosphate, pH, and electric conductivity (EC) existence. This study provided a standard set of comprehensive comparison methodologies utilising physicochemical and biological properties required for substrate characterization. The findings of this research work have strong potential in the future to be used in selecting the most suitable lightweight growing medium for a green roof based on stakeholder requirements.

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Assessment of soil salinity indexes using electrical conductivity sensors

Cited by 27 publications

References 36 publications

Effects of Salinity on the Biodegradation of Polycyclic Aromatic Hydrocarbons in Oilfield Soils Emphasizing Degradation Genes and Soil Enzymes

Effects of Salinity on the Biodegradation of Polycyclic Aromatic Hydrocarbons in Oilfield Soils Emphasizing Degradation Genes and Soil Enzymes

Sensor-Based Irrigation Reduces Water Consumption without Compromising Yield and Postharvest Quality of Soilless Green Bean

Feasibility study for estimating optimal substrate parameters for sustainable green roof in Sri Lanka

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