Response of soil microbial Communities, inorganic and organic soil carbon pools in arid saline soils to alternative land use practices

Somenahally, Anil; McLawrence, Javid; Chaganti, Vijayasatya N.; Ganjegunte, Girisha; Obayomi, Olabiyi; Brady, Jeff A.

doi:10.1016/j.ecolind.2023.110227

Cited by 15 publications

(11 citation statements)

References 78 publications

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“…This finding was consistent with an investigation conducted on reclaimed land in the coastal area of Eastern China, even though the aboveground plant species may differ [53]. Furthermore, studies have shown that in several ecosystems, fungi remained relatively stable, and their diversity and composition were not as sensitive as those of bacteria [10,43,54]. However, significant modifications in salinity and plant species contribute to changes in fungal communities.…”

Section: Discussionsupporting

confidence: 90%

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Soil Microbial Communities Show Different Patterns under Different Land Use Types in the Coastal Area of Nantong, China

Li,

Hu,

Wang

et al. 2023

Agronomy

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Tidal flats in eastern China have undergone various transformations into other land-use types. Understanding the impact of land-use conversion on soil properties and microbial communities is crucial for effective ecological conservation efforts. In this study, we compared soil chemical properties and the diversity, composition, and ecological functions of soil bacterial and fungal communities across four land-use types: natural bare land (BL), unused reclaimed tidal land (Phragmites, PL), agricultural land (maize, ML), and shelterbelt land (SL), utilizing next-generation sequencing technology. The results indicated that soil electrical conductivity decreased, while soil organic carbon (SOC) and nutrient contents increased in ML and SL compared to BL and PL. The bacterial Chao1 and fungal Chao1 and Shannon values vary across different land-use types. A higher relative abundance of Acidobacteriota, specifically RB41, was found in ML compared to BL. Principal coordinate and PerMANOVA analysis showed that the composition of bacterial and fungal communities differed significantly across the four land-use types. SOC explained the most variance in both bacterial and fungal communities. Carbon-related functional genes and fungal guilds exhibit greater diversity across the four land-use types compared to nitrogen-related functional genes. In conclusion, the transformation of natural land-use types to managed one greatly altered soil chemical and microbial properties. Our study offers foundational insights into the microbial communities in the typical land-use types of Eastern China’s coastal area. Future studies should emphasize the quantification of human interventions and their impact on soil microbial communities and ecological functions.

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Section: Discussionsupporting

confidence: 90%

“…The soil nutrient cycle is mainly driven by soil microbes, and changes in microbial community composition and diversity could be driven by changes in land-use type [16,42,43]. An increase in Chao1 and Shannon values indicates a more diverse community.…”

Section: Discussionmentioning

confidence: 99%

Soil Microbial Communities Show Different Patterns under Different Land Use Types in the Coastal Area of Nantong, China

Li,

Hu,

Wang

et al. 2023

Agronomy

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“…Soil C concentrations were higher in the topsoil of irrigated areas (Figure 2, Supplementary Material), which agrees with the general literature [45,61]. Despite that, the C stocks were not influenced by irrigation (Figure 4), mostly due to the strong decrease in bulk density, which is an exponential function of soil C concentration (Supplementary Material).…”

Section: Exports Of Contaminants and Soil Nutrient Stockssupporting

confidence: 89%

“…TN and TOC results were similar, mostly due to N being predominantly present in organic form. The fact that, in some instances, NO 3 − and TN (and TOC) concentrations in soil are higher under irrigated areas is consistent with some of the literature showing similar trends [10,13,[41][42][43][44][45]. However, these results were not consistent for both plant species at all soil depths and all forms of N (TN, NO 3 − and NH 4 + ), highlighting the complex N cycling processes in the soil with a myriad of compounding factors [25,46].…”

Section: Changes In Soil Chemical Propertiessupporting

confidence: 79%

Changes in Soil Chemistry and Soil Nutrient Stocks after 30 Years of Treated Municipal Wastewater Land Disposal: A Natural Experiment

Gutiérrez-Ginés,

Robinson,

Halford

et al. 2023

Sustainability

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The benefits and risks of irrigation with treated municipal wastewater (TMW) on soil quality and crop production have been largely investigated. However, there is a lack of knowledge on the effect of plant species on the interaction between soil quality and TMW. We leveraged a natural experiment investigating the effect of 30 years of TMW irrigation at a rate of 4 m y−1 (eq. 1860 kg N ha−1 y−1, and 264 kg P ha−1 y−1) on a sandy soil under pine plantation and pasture, compared with soil under New Zealand native Kunzea robusta. There was a consistent increase in soil P with irrigation under both pasture (Olsen P in topsoil 40 mg kg−1 vs. 74 mg kg−1) and pine (18 mg kg−1 vs. 87 mg kg−1), which was significant down to 2 m deep. The pH, electrical conductivity, total organic C and N, inorganic N and Na were affected by both irrigation and vegetation type. Beyond P soil accumulation, there was no evidence of soil degradation by Na or trace element accumulation. Estimations of nutrient mass balance indicated that 80% and 60% of the total applied P was lost under pine and pasture, respectively. This percentage increased to 96% and 83% for N, respectively. Although plant species had a significant effect on soil quality and N and P losses from TMW-irrigated areas, adjusting irrigation rates to levels that can be managed by plants is the only way to design sustainable TMW irrigation schemes.

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“…Treatment with an amendment of treated wastewater_bioenergy sorghum_gypsum assembled a distinctive microbial community structure and accumulated the highest content of SOC (7.66 g kg −1 ). However, it also resulted in the lowest content of soil inorganic carbon (6.63 g kg −1 ) (Somenahally et al, 2023 ). In addition, under the compound improvement measures, desulfurized gypsum changes the physicochemical and biological properties of the soil, which may also reduce the mineralization of “old carbon” and accelerate the dynamic process of the formation of “new carbon,” thus affecting the sequestration of SOC.…”

Section: Introductionmentioning

confidence: 99%

Impacts of various amendments on the microbial communities and soil organic carbon of coastal saline–alkali soil in the Yellow River Delta

Liu,

Liang,

Zhao

et al. 2023

Front. Microbiol.

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The utilization of industrial and agricultural resources, such as desulfurization gypsum and straw, is increasingly favored to improve saline alkali land. However, there is still a lack of comprehensive study on the mechanism of organic carbon turnover under the conditions of desulfurization gypsum and straw application. We studied the changes in soil chemical performance, microbial diversity, and microbial community structure in soils with the addition of various levels of straw (no straw, S0; low straw, Sl; medium straw, Sm; and high straw, Sh) and gypsum (no gypsum, DG0; low gypsum, DGl; and high gypsum, DGh) in a 120-day incubation experiment. The bacterial and fungal community richness was higher in the SmDGl treatment than in the SmDG0 treatment. The microbial community evenness showed a similar pattern between the SmDGl and SmDG0 treatments. The combination of the straw and desulfurization gypsum treatments altered the relative abundance of the main bacterial phyla Bacteroidetes and Firmicutes and the dominant fungal class Sordariomycetes, which increased with the enhancement of the SOC ratio. The combination of the straw and desulfurization gypsum treatments, particularly SmDGl, significantly decreased the soil pH and exchangeable sodium percentage (ESP), while it increased the soil organic carbon, microbial biomass carbon, and activities of soil enzymes. Improvement in the soil salinization environment clearly drove the changes in bacterial α-diversity and community, particularly those in the soil carbon fractions and ESP. In conclusion, these findings provide a strong framework to determine the impact of application practices on soil restoration, and the information gained in this study will help to develop more sustainable and effective integrated strategies for the restoration of saline–alkali soil.

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Response of soil microbial Communities, inorganic and organic soil carbon pools in arid saline soils to alternative land use practices

Cited by 15 publications

References 78 publications

Soil Microbial Communities Show Different Patterns under Different Land Use Types in the Coastal Area of Nantong, China

Soil Microbial Communities Show Different Patterns under Different Land Use Types in the Coastal Area of Nantong, China

Changes in Soil Chemistry and Soil Nutrient Stocks after 30 Years of Treated Municipal Wastewater Land Disposal: A Natural Experiment

Impacts of various amendments on the microbial communities and soil organic carbon of coastal saline–alkali soil in the Yellow River Delta

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