An ecological technology of coastal saline soil amelioration

Zhang, Huanshi; Zai, Xueming; Wu, Xianghua; Qin, Pei; Zhang, Weiming

doi:10.1016/j.ecoleng.2014.03.022

Cited by 25 publications

(13 citation statements)

References 46 publications

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“…Arbuscular mycorrhizal fungi (AMF) can alter the internal ionic balance in their host plants under conditions of salt stress [101,102], by selectively taking up K + and Ca 2+ and excluding Na + [103], thus rendering them more tolerant to sodic soils. This approach has been successful in the revegetation of saline, low fertility soils [104,105]. Few studies have examined the utility of microorganisms in altering the ionic balance in bauxite residues by the mechanisms above.…”

Section: Altering the Ionic Balancementioning

confidence: 99%

Microbially-driven strategies for bioremediation of bauxite residue

Santini

Kerr

Warren

2015

Journal of Hazardous Materials

119

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Globally, 3 Gt of bauxite residue is currently in storage, with an additional 120 Mt generated every year. Bauxite residue is an alkaline, saline, sodic, massive, and fine grained material with little organic carbon or plant nutrients. To date, remediation of bauxite residue has focused on the use of chemical and physical amendments to address high pH, high salinity, and poor drainage and aeration. No studies to date have evaluated the potential for microbial communities to contribute to remediation as part of a combined approach integrating chemical, physical, and biological amendments. This review considers natural alkaline, saline environments that present similar challenges for microbial survival and evaluates candidate microorganisms that are both adapted for survival in these environments and have the capacity to carry out beneficial metabolisms in bauxite residue. Fermentation, sulfur oxidation, and extracellular polymeric substance production emerge as promising pathways for bioremediation whether employed individually or in combination. A combination of bioaugmentation (addition of inocula from other alkaline, saline environments) and biostimulation (addition of nutrients to promote microbial growth and activity) of the native community in bauxite residue is recommended as the approach most likely to be successful in promoting bioremediation of bauxite residue.

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Section: Altering the Ionic Balancementioning

confidence: 99%

Microbially-driven strategies for bioremediation of bauxite residue

Santini

Kerr

Warren

2015

Journal of Hazardous Materials

119

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“…Researchers have found that soil nutritional disorders, soil enzyme activity disruptions, changes in soil microorganism community structures, increases in plant diseases and insect pests and accumulation of plant allelochemicals can be caused by long‐term continuous cropping, which results in small, thin and stunted peanut plants with significantly reduced total biomass, pod quality and pod yield . Soil enzyme activity plays a vital role in the decomposition of organic residues and nutrient cycling in soil and is thus considered a suitable indicator of soil quality, especially in the case of the enzymes urease, sucrase and hydrogen peroxidase . Additionally, the soil microbial community is an important parameter for monitoring and evaluating soil health and can directly influence the structure and composition of the above‐ground plant community, promote plant growth, increase stress tolerance and mediate local patterns of nutrient cycling, so it is also an important index of soil quality .…”

Section: Introductionmentioning

confidence: 99%

“…1,2 Soil enzyme activity plays a vital role in the decomposition of organic residues and nutrient cycling in soil and is thus considered a suitable indicator of soil quality, especially in the case of the enzymes urease, sucrase and hydrogen peroxidase. 3 Additionally, the soil microbial community is an important parameter for monitoring and evaluating soil health and can directly influence the structure and composition of the above-ground plant community, promote plant growth, increase stress tolerance and mediate local patterns of nutrient cycling, so it is also an important index of soil quality. 4 As a result, soil enzyme activity and soil microbial community are generally tested to assess soil environment.…”

Section: Introductionmentioning

confidence: 99%

Application of Serratia marcescensRZ‐21 significantly enhances peanut yield and remediates continuously cropped peanut soil

Yang

Wang

et al. 2015

J Sci Food Agric

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“…Apart from the natural factors resulting in soil salinization, long-term irrigated agriculture with poor drainage system contributes to secondary salinization (Ouni et al, 2013;Qadir and Oster, 2004;Kitamura et al, 2006). Salt accumulation has detrimental effects on soil physical and chemical properties (Zhang et al, 2014;Shukla et al, 2011) and on enzyme activities and microbial and biochemical activities (Rietz and Haynes, 2003;Yuan et al, 2007;Karlen et al, 2008), thus inhibiting agriculture productivity (Rady, 2011;Ouni et al, 2014). Excessive Na + may cause high pH, changes in soil solution ions and nutrients, and destabilization of soil structure (Li et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

GIS-mapping spatial distribution of soil salinity for Eco-restoring the Yellow River Delta in combination with Electromagnetic Induction

Liu

Zhang

et al. 2016

Ecological Engineering

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a b s t r a c tSoil salinization is one of serious ecological problems around the world, which seriously restricts the stability of ecosystem and the economic development of agriculture. Mapping and monitoring spatial distribution of soil salinity is important for management of ecology and agriculture. This study was carried out to explore the spatial distribution of soil salinity in the Yellow River Delta using the portable device EM38-MK2 with geostatistical analysis. Apparent soil electrical conductivities were measured under four kinds of measurement modes (0.5H, 0.5 V, 1.0H and 1.0 V, respectively). The results revealed that electrical conductivity of 1:5 soil to water extract (ECe) varied from 0.965 to 1.872 dS m −1 for all sampled soil profiles, and the salinity of topsoil was the highest, which indicated that soil soluble salts accumulated to the surface. The salinity in the top layer showed strong spatial variability while salinities of other layers were moderate. Soil salinity displayed a significant zonal distribution, gradually decreasing with the increase of distance to the coastline. The regions with high ECa values were located in the north and the east of the study area, whereas regions with low ECa values were located in the south and the west parts. The correlation coefficient showed that salinities of adjacent two soil layers reached a significant level of 0.01, and gradually decreased with increasing soil depth. The linear interpretation models with ECa as independent variables and ECe as dependent variables for each depth were with R 2 between 0.828 and 0.919. The interpretation models, taking ECa and ECe of 0-15 cm depth as independent variables, and ECe of each layer in 15-100 cm depth as dependent variables, were with higher R 2 between 0.930 and 0.953. The mean error (ME) showed that there was small positive deviation in 40-100 cm whereas a high positive deviation in the topsoil (0-40 cm). The scatter plots also indicated that the models had better accuracy of salinity estimation in the top soil layers (0-80 cm). The results provides solid basis for eco-restoring in the Yellow River delta.

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An ecological technology of coastal saline soil amelioration

Cited by 25 publications

References 46 publications

Microbially-driven strategies for bioremediation of bauxite residue

Microbially-driven strategies for bioremediation of bauxite residue

Application of Serratia marcescensRZ‐21 significantly enhances peanut yield and remediates continuously cropped peanut soil

GIS-mapping spatial distribution of soil salinity for Eco-restoring the Yellow River Delta in combination with Electromagnetic Induction

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