Native soil organic-carbon contents shape distinct bacterial communities associated with priming effect

Xu, Chunxiang; You, Mengyang; Han, Xiaofei; Lu, Xinchun; Zou, Wenxiu; Yan, Jun

doi:10.1016/j.pedobi.2022.150842

Cited by 2 publications

(3 citation statements)

References 47 publications

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“…Mollisols are a type of soil rich in SOC. Typically, Mollisols with SOC content below 32 g C kg –1 soil –1 are classified as low in carbon . For the purpose of our study, to enhance clarity in analysis and conclusions, we have categorized soils with an initial SOC content of less than 28 g C kg –1 soil –1 as low-C soils and those with an initial SOC content exceeding 28 g C kg –1 soil –1 as high-C soils.…”

Section: Resultsmentioning

confidence: 99%

“…Typically, Mollisols with SOC content below 32 g C kg −1 soil −1 are classified as low in carbon. 41 For the purpose of our study, to enhance clarity in analysis and conclusions, we have categorized soils with an initial SOC content of less than 28 g C kg −1 soil −1 as low-C soils and those with an initial SOC content exceeding 28 g C kg −1 soil −1 as high-C soils. The two RCs (RC1 and RC2) explained 87 and 80% of the SOC molecular correlation matrix in the low-and high-C samples, respectively (Figure S11).…”

Section: Changes In Extractablementioning

confidence: 99%

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Warming Leads to Changes in Soil Organic Carbon Molecules Due to Decreased Mineral Protection

Zhang,

Huang,

et al. 2024

J. Agric. Food Chem.

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Climate change affects the content and composition of soil organic carbon (SOC). However, warming-induced changes in the SOC compounds remain unknown. Using nuclear magnetic resonance spectroscopy, molecular mixing models, and Fourier transform ion cyclotron resonance mass spectrometry, we analyzed the variations and relationships in molecular compounds in Mollisol with 10−56 g C kg −1 soil −1 by translocating soils under six climate regimes. We found that increased temperature and precipitation were negatively correlated with carbohydrate versus lipid and lignin versus protein. The former was consistent across soils with varying SOC contents, but the latter decreased as the SOC content increased. The carbohydrate−lipid correlations were related to dithionite−citrate-extractable Fe, while the lignin−protein correlations were linked to changes in moisture and pyrophosphate-extractable Fe/Al. Our findings indicate that the reduction in the mineral protection of SOC is associated with molecular alterations in SOC under warming conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Changes In Extractablementioning

confidence: 99%

Warming Leads to Changes in Soil Organic Carbon Molecules Due to Decreased Mineral Protection

Zhang,

Huang,

et al. 2024

J. Agric. Food Chem.

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“…Researchers have extensively examined the environmental factors that influence the direction and magnitude of the priming effect and have observed that it is strongly related to several incubation conditions, including the soil's organic carbon content, texture, amount of exogenous organic carbon addition, and soil edaphic factors [23]. Noticeably, some studies on the priming effect have only used a single incubation temperature [24][25][26]. In this aspect, further investigations are necessary to understand the magnitude of the priming effect under varying incubation temperatures.…”

Section: Introductionmentioning

confidence: 99%

Effect of Exogenous Nutrient Addition on Soil Organic Carbon Mineralization and Stabilization

Duan

Zhang

2023

Agronomy

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Soil organic carbon (SOC) pools have the potential to attain sustainable agriculture goals under climate change. External organic and inorganic nutrient inputs considerably affect SOC mineralization and SOC pools. Therefore, a laboratory-based, three-factor soil incubation experiment was conducted to investigate the impact of different exogenous nutrient additions on the mineralization and stability of SOC. The study investigated the effects of three fertilizer types (inorganic, organic, and a combination of inorganic and organic) and three rates of fertilizer addition (low, medium, and high) while considering two temperature levels (15 °C and 25 °C). At 25 °C, the application of fertilizer at a high rate significantly increased the SOC mineralization (2.84–19.97%) compared to fertilizer applied at a low rate, while, at 15 °C, different fertilizer types had no significant impact. Overall, fertilization resulted in an increase in the total potential mineralizable carbon (7.87–84.50%), while the rate of decomposition was decreased. The priming effect of inorganic fertilizer decreased over time, with the main effect observed during the initial 14 days. The addition of organic fertilizer resulted in a lesser increment in the soil activity index while simultaneously yielding a higher Q10 compared to inorganic fertilizer. Overall, the mixed application of organic and inorganic fertilizers was suggested to improve SOC stabilization and promote sustainable agricultural development.

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Native soil organic-carbon contents shape distinct bacterial communities associated with priming effect

Cited by 2 publications

References 47 publications

Warming Leads to Changes in Soil Organic Carbon Molecules Due to Decreased Mineral Protection

Warming Leads to Changes in Soil Organic Carbon Molecules Due to Decreased Mineral Protection

Effect of Exogenous Nutrient Addition on Soil Organic Carbon Mineralization and Stabilization

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