A Review on Microalgae Application in Bioenergy Generation &amp;amp; Integrated Wastewater Management

Fatima, Nighat; Bahuguna, Vivekanand; Kumar, Vinod

doi:10.2139/ssrn.3298651

Cited by 3 publications

(3 citation statements)

References 81 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The soils analyzed were classified relative to the pH indicator as slightly alkaline (CRC), moderately alkaline (CTJ < CTH < AGQ), and strongly alkaline (CYI < JRM), possibly due to irrigation practices with well water and the various fertilization regimes used, which are characteristic of the region [60,61] ( Table 1). For the EC indicator, soils were classified as non-saline, when the effect on soil structure due to salt concentration could be considered as negligible [15,31].…”

Section: Physicochemical Indicatorsmentioning

confidence: 99%

Development of a Soil Quality Index for Soils under Different Agricultural Management Conditions in the Central Lowlands of Mexico: Physicochemical, Biological and Ecophysiological Indicators

et al. 2020

View full text Add to dashboard Cite

The Bajío—Mexico’s central lowlands—is a region of economic importance because of its agricultural industry. Over time, agricultural practices have led to soil deterioration, loss of fertility, and abandonment. In this study, six agricultural soils were analyzed: AGQ, CTH, CTJ, JRM, CRC, and CYI, and used to develop a soil quality index (SQI) that includes the use of physicochemical, biological, and ecophysiological indicators to differentiate soil quality. Principal component analysis (PCA) was used, reducing the indicators from 46 to 4, which represents 80.4% of data variability. It was implemented the equation of additive weights using the variance of the principal components as a weight factor for the SQI. The developed SQI was according to the indicators WHC, SLT, N-NO3−, and qCO2, differentiating the quality of soils from the agricultural management in low quality (JRM < CYI < AGQ) and moderate quality (CTJ < CRC < CTH). The use of biological and ecophysiological indicators added to the PCA and the equation of additive weights allowed establishing an SQI with a minimum of indicators, sensitive to agricultural management, facilitating its interpretation and implementation for the Mexican Bajío region and soils in similar conditions around the world.

show abstract

Section: Physicochemical Indicatorsmentioning

confidence: 99%

Development of a Soil Quality Index for Soils under Different Agricultural Management Conditions in the Central Lowlands of Mexico: Physicochemical, Biological and Ecophysiological Indicators

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The EC indicator showed that high levels of salts were not detected in the solution of the evaluated soils. This could be due to the use of irrigation water with low salt concentrations, in contrast to the use of well water-characteristic of the region-that usually has a high concentrations of salts and thus leads to the accumulation of salts on the soil surface [43]. Similarly, the WHC indicator did not show significant differences between the analysed soils; where they were classified as low capacity (Ac2 < Ir3 < Ir2 < Ir4 < Ir1 < Ac1 < Ac1 < Sa1 < Sa2) or moderate capacity (Sa6 < Ac3).…”

Section: Physicochemical and Biological Characterisation Of Soilsmentioning

confidence: 99%

Corn Cropping Systems in Agricultural Soils from the Bajio Region of Guanajuato: Soil Quality Indexes (SQIs)

Sánchez-Guzmán,

Bedolla-Rivera,

Conde-Barajas

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

Agriculture is a sector of great importance for Mexico’s economy, generating employment and contributing significantly to the country’s gross domestic product. The Bajio stands out as one of the most productive agricultural regions in Mexico. However, intensive agricultural practices in this area have caused a progressive deterioration and loss of soil fertility. This study focused on evaluating the quality of soils used for agriculture in the Bajio region of the State of Guanajuato, Mexico. This evaluation, utilised soil quality indexes (SQIs) based on a total of 27 physicochemical, biological and enzymatic indicators. These indicators were selected by means of a principal component analysis (PCA), which allowed for the identification of a minimum set of data. The SQIs developed in this study categorised soils into different quality levels, ranging from low to high, mainly based on the values observed in the biological indicators (SMR and qCO2), which comprised the established SQIs. The inclusion of these biological indicators provides the developed SQIs with greater sensitivity to detect minor disturbances in agricultural soils due to human activity, compared with SQIs consisting only of physicochemical indicators. The developed SQIs can be used to ensure high-quality food production in soils used for corn cultivation under similar conditions, both nationally and internationally.

show abstract

“…The soil presented a slightly alkaline pH, possibly due to the irrigation practices that are characteristic of the region (Fatima et al 2018), where well water with a high content of salts is used, which can affect the growth and yield of crops, the availability of nutrients and the OM content (Leogrande and Vitti 2019). The EC indicator was found within the range considered as non-saline, implying an insignificant effect on the structure and texture of the soil; however, its effect on OM mineralization and enzymatic and microbial activity should not be underestimated (Singh 2016).…”

Section: Soil and Biosolid Characterizationmentioning

confidence: 99%

Comparison of methodolgies of soil quality indices (SQI) for sodic soil

Bedolla-Rivera

Negrete-Rodríguez²,

Gámez-Vázquez³

et al. 2022

Rev. Int. Contam. Ambie.

View full text Add to dashboard Cite

Soil degradation and the use of urban biosolid wastes to soil restoration have an economic, social-environmental and health impact. Therefore, there is interest worldwide in the use and comparison of methodologies to establish soil quality indexes (SQIs) based on physical, chemical, and biological indicators of soils. Considering that more than 60% of the territory in the Bajío region of Mexico in the State of Guanajuato is affected by some type of soil degradation, three methodologies for the establishment of SQIs—additive, weighted and unified weighted indexes—were compared in this study to evaluate the short-term effects—30 days—of the addition of biosolids as soil improvers. The methodologies were applied in experiments on carbon (C) and nitrogen (N) mineralization dynamics in a sodic agricultural soil. The ammonium indicator (N-NH4+) was established as the one that is most related to the quality of the soil. The additive and unified weighted indexes differentiated the level of soil quality with respect to time and treatment. The developed SQIs can be used for short-term assessment of the quality of agricultural soils under amendment addition treatments with biosolids or similar organic products.

show abstract

A Review on Microalgae Application in Bioenergy Generation & Integrated Wastewater Management

Cited by 3 publications

References 81 publications

Development of a Soil Quality Index for Soils under Different Agricultural Management Conditions in the Central Lowlands of Mexico: Physicochemical, Biological and Ecophysiological Indicators

Development of a Soil Quality Index for Soils under Different Agricultural Management Conditions in the Central Lowlands of Mexico: Physicochemical, Biological and Ecophysiological Indicators

Corn Cropping Systems in Agricultural Soils from the Bajio Region of Guanajuato: Soil Quality Indexes (SQIs)

Comparison of methodolgies of soil quality indices (SQI) for sodic soil

Contact Info

Product

Resources

About