Elevated salinity and water table drawdown significantly affect greenhouse gas emissions in soils from contrasting land-use practices in the prairie pothole region

Shahariar, Shayeb; Farrell, Richard E.; Soolanayakanahally, Raju; Bedard‐Haughn, Angela

doi:10.1007/s10533-021-00818-3

Cited by 9 publications

(3 citation statements)

References 78 publications

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“…Another possible explanation is depletion of soil organic carbon and total N at the experimental site, because of the local practice of not returning crop residues to the soil. In addition, the soil at the study site is moderately saline and studies on paddy fields have found that soil salinity affects CH 4 emissions through suppressing the activities of soil microbes, including methanogens [34,35]. However, the soil salinity conditions were improved prior the present study and the soil salinity effect was probably limited.…”

Section: Accumulated Ghg Fluxesmentioning

confidence: 72%

“…Methanogenic bacteria are very sensitive to variations in soil pH, with the highest CH 4 production rates at neutral pH and with small changes in soil pH sharply lowering CH 4 production [33]. High soil salt content decreases CH 4 emissions, through suppressing the activities of soil microbes, including methanogens [34,35]. The reported effects of soil salinity on N 2 O emission are inconsistent (increase, decrease or no response) [36,37].…”

Section: Introductionmentioning

confidence: 99%

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Drainage intensity in paddy rice fields : nitrogen flows, salinity, rice yield and greenhouse gas emissions

Tuyishime

2023

Acta Universitatis Agriculturae Sueciae

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Managing drainage intensity is important in controlling soil moisture and nutrient losses and improving crop yields. This thesis evaluated the effects of drainage intensity on nitrogen losses, salinity and rice grain yield in three cropping seasons, and on gaseous emissions of methane (CH4) and nitrous oxide (N2O) from rice flowering to ripening in one season, on a marshland in semiarid region of Rwanda. Three drainage treatments were compared in a randomised complete block design: drainage to 0.6 m depth, weir open four times per week (S4); drainage to 1.2 m depth, weir open four times per week (D4); and drainage to 1.2 m, weir open twice per week (D2). In seasons 1 and 3, treatment D4 had higher drainage outflow and higher salt loads than treatments D2 and S4, but in season 2 treatment D2 had higher drainage outflow and higher salt loads than D4 and S4. Drainage water salinity (ECwd) decreased by around 41-57% from season 1 to season 2, and by 29-37% from season 2 to season 3. Soil salinity decreased by one electrical conductivity (EC) unit (dS m-1) from season 1 to season 2, and by a similar amount from season 2 to season 3. Nitrogen uptake and rice grain yield were significantly greater in the deep drainage treatments (D4, D2) compared with shallow drainage (S4). Deep drainage (D4, D2) reduced CH4 emissions but had no marked effect on N2O emissions. These findings suggest that deep drainage performs better than shallow drainage in semi-arid paddy fields, as it enables a balance between maintaining water in the soil and having sufficient drain outflow to leach salts, reduce CH4 emissions and achieve high rice yield.

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Section: Accumulated Ghg Fluxesmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Drainage intensity in paddy rice fields : nitrogen flows, salinity, rice yield and greenhouse gas emissions

Tuyishime

2023

Acta Universitatis Agriculturae Sueciae

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“…Nevertheless, saline water irrigation (SWI) brings salt into the soil. Some studies found salt could affect microbial processes of soil C and N cycles ( Poffenbarger et al, 2011 ; Yu et al, 2019 ; Shahariar et al, 2021 ). Our previous research has also found that SWI alters the content of soil environmental factors involved in C and N cycles, such as soil organic matter, inorganic N, and greenhouse gasses ( Zhou et al, 2023 , 2024 ).…”

Section: Introductionmentioning

confidence: 99%

Long-term saline water irrigation affected soil carbon and nitrogen cycling functional profiles in the cotton field

Zhou,

Wang,

Han

et al. 2024

Front. Microbiol.

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Saline water irrigation (SWI) plays an important role in alleviating water resource shortages. At the same time, the salt input of irrigation water affects soil microorganisms which participate in various ecological processes of terrestrial ecosystems. However, the responses of soil microbial functional potential to long-term SWI remains unclear. Therefore, Metagenomics method was utilized in cotton fields under long-term SWI to reveal the microbial functional profiles associated with soil carbon and nitrogen cycles. Results indicated that SWI impacted the microbial functional profiles of soil carbon and nitrogen cycles in the cotton fields significantly. Especially, irrigation water salinity inhibited the relative abundances of sacC and vanB, which are soil carbon degradation genes. SWI also affected the functional gene abundance of nitrogen degradation, dissimilatory nitrate reduction, and nitrification. Moreover, SWI significantly increased the abundance of Candidatus_Cloacimonetes in both carbon and nitrogen cycles. In the discussion, we used person analysis found that soil salinity, pH, and ammonium nitrogen were important factors affecting the abundance of functional genes and microbial taxa. Overall, this study indicated that long-term SWI significantly influenced specific microbial functional genes and taxa abundance, which may lead to predictable outcomes for soil carbon and nitrogen cycling, and is of great importance in exploring the impact of SWI on soil environments.

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Impact of Water Table on Methane Emission Dynamics in Terrestrial Wetlands and Implications on Strategies for Wetland Management and Restoration

Yang

He²,

Jiang³

et al. 2022

Wetlands

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Elevated salinity and water table drawdown significantly affect greenhouse gas emissions in soils from contrasting land-use practices in the prairie pothole region

Abstract: Elevated salinity and water table drawdown significantly affect greenhouse gas emissions in soils from contrasting land-use practices in the prairie pothole region

Cited by 9 publications

References 78 publications

Drainage intensity in paddy rice fields : nitrogen flows, salinity, rice yield and greenhouse gas emissions

Drainage intensity in paddy rice fields : nitrogen flows, salinity, rice yield and greenhouse gas emissions

Long-term saline water irrigation affected soil carbon and nitrogen cycling functional profiles in the cotton field

Impact of Water Table on Methane Emission Dynamics in Terrestrial Wetlands and Implications on Strategies for Wetland Management and Restoration

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