Role of gypsum and compost in reclaiming saline-sodic soils

Abdel-Fattah, Mohamed K.

doi:10.9790/2380-0133038

Cited by 63 publications

(48 citation statements)

References 18 publications

(17 reference statements)

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“…As shown in Figure 6a, a significant increase in EC was observed following the increase from 5% to 10% biochar. Similar behavior was reported by Abdel-Fattah [46], in which the salts can be readily leached during the first leaching period. Figure 6b shows the pH variation as a function of the biochar content.…”

Section: Resultssupporting

confidence: 66%

Characterization and Potential Use of Biochar for the Remediation of Coal Mine Waste Containing Efflorescent Salts

2017

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Abstract:In open pit coal mining, soil and vegetation are removed prior to the start of mining activities, causing physical, chemical, and microbiological changes to the soil and landscape. The present work shows the results of an integrated study of the remediation of mine waste with a high level of salt contamination in areas of the Cesar Department (Colombia), employing biochar as an amendment. Physical-chemical properties including Munsell color, texture, pH, electrical conductivity, water-holding capacity, cation exchange capacity, metal content, organic carbon, sulfates, extractable P, and total nitrogen were characterized both in the soils contaminated with mine residues and the biochar sample. A high concentration of sulfates, calcium, iron, and aluminum and a significant presence of Na, followed by minor amounts of Mg, K, Cu, and Mn, were observed in efflorescent salts. X-ray diffraction indicated a high presence of quartz and gypsum and the absence of pyrite and Schwertmannite in the efflorescent salt, while showing broad peaks belonging to graphene sheets in the biochar sample. Soil remediation was evaluated in Petri dish seed germination bioassays using Brachiaria decumbens. Biochar was shown to be effective in the improvement of pH, and positively influenced the germination percentage and root length of Brachiaria grass seeds.

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Section: Resultssupporting

confidence: 66%

Characterization and Potential Use of Biochar for the Remediation of Coal Mine Waste Containing Efflorescent Salts

2017

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“…While, the maximum value of EC was noted in control (T1). Favorable effect of crop residue on decreasing EC of soil could be contributed to the improvement of the soil structure and porosity, thus increasing salt leaching and reducing surface evaporation which inhibits salt accumulation in the surface layers (Wang and Li, 1990;Abdel-Fattah, 2012). These results are reinforced by the findings of Ahn et al (2010) that rice straw at 5, 10, and 15 Mg ha -1 with fertilizer significantly decreased the pH and EC of salt affected soil.…”

Section: Wheat Grain Yield (Mg Ha -1supporting

confidence: 80%

“…The maximum pHs value was noted in T1 followed by T4. The sharp decline in soil pH in T2 was due to release of Ca 2+ from gypsum which replaces the exchangeable Na + (Abdel-Fattah, 2012). As crop residue significantly increased soil organic matter level, so decrease in pH of plots receiving the integrated treatments could be related to release of organic acids and CO2 during the decomposition of wheat and rice straw (Sarwar et al, 2008).…”

Section: Wheat Grain Yield (Mg Ha -1mentioning

confidence: 99%

Crop Residues Management for Rice-Wheat Cropping System in Saline-Sodic Soil

Ahmed¹,

Qādir²,

Jami³

et al. 2014

Korean Journal of Soil Science and Fertilizer

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) when compared with control. Soil properties were also improved by used amendments, pronounced decreased in EC e , pH s and SAR were recorded in T 2 followed by T 3 . The efficiency of the treatments could be arranged in following order gypsum at 100% G.R.> gypsum at 25% G.R. + wheat straw at 3 Mg ha -1 > gypsum at 25% G.R. + rice and wheat straw at 3 Mg ha -1 > gypsum at 25% G.R. + rice straw at 3 Mg ha -1 > control.

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“…Substantial amounts of research have been conducted to examine the effects of gypsum application on correcting soil sodicity and consequently enhancing crop growth (Hamza and Anderson, 2003;Abdel-Fattah, 2012;Rasouli et al, 2013). However, there has so far been no work reported with a focus on atmospheric CO 2 sequestration associated with these agricultural practices.…”

Section: Introductionmentioning

confidence: 97%