Depth‐dependent responses of soil organic carbon under nitrogen deposition

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(3)

Published: March 1, 2024

Abstract Emerging evidence points out that the responses of soil organic carbon (SOC) to nitrogen (N) addition differ along profile, highlighting importance synthesizing results from different layers. Here, using a global meta‐analysis, we found N significantly enhanced topsoil (0–30 cm) SOC by 3.7% (±1.4%) in forests and grasslands. In contrast, subsoil (30–100 initially increased with but decreased over time. The model selection analysis revealed experimental duration vegetation type are among most important predictors across wide range climatic, environmental, edaphic variables. contrasting indicate considering deep layers, particularly for long‐term continuous deposition. Finally, lack depth‐dependent modeling frameworks has likely resulted overestimation changes storage under

Language: Английский

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Differential impacts of nitrogen addition on soil dissolved organic carbon in humid and non-humid regions: A global meta-analysis

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 377, P. 124744 - 124744

Published: March 1, 2025

Language: Английский

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Response of microbial communities to the changes in grazing intensity and season in a typical steppe

Environmental Research, Journal Year: 2024, Volume and Issue: 246, P. 118126 - 118126

Published: Jan. 8, 2024

Language: Английский

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Divergent responses of soil microbial community to long-term nitrogen and phosphorus additions in a subtropical Chinese fir plantation

CATENA, Journal Year: 2024, Volume and Issue: 242, P. 108132 - 108132

Published: June 1, 2024

Language: Английский

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Subtropical forest macro-decomposers rapidly transfer litter carbon and nitrogen into soil mineral-associated organic matter

Forest Ecosystems, Journal Year: 2024, Volume and Issue: 11, P. 100172 - 100172

Published: Jan. 1, 2024

Forest soils in tropical and subtropical areas store a significant amount of carbon. Recent frameworks to assess soil organic matter (SOM) dynamics under evolving global conditions suggest that dividing bulk SOM into particulate mineral-associated (POM vs. MAOM) is promising method for identifying how contributes reducing warming. Soil macrofauna, earthworms, millipedes have been found play an important role facilitating processes. However, these two co-existing macrofaunae impact the litter decomposition process directly formation POM MAOM remains unclear. Here, we set up microcosm experiment, which consisted 20 microcosms with four treatments: earthworm addition (E), (M), earthworm, millipedes, (E + M), control (only addition) five replicates. The were sterilized prior beginning incubation experiment remove any existing microbes. After incubating samples 42 days, properties (mass, C, N contents), physicochemical properties, as well C contents, 13C abundance 0–5 5–10 cm layers measured. Finally, relative influences microbial on distribution fractions analyzed. mass, associated all treatments significantly decreased after incubation, especially treatment E M (litter mass: −58.8%, C: −57.0%, N: −75.1%, respectively), while biomass E. Earthworm or millipede alone showed no effects carbon (OC) total nitrogen (TN) content fraction, but joint both increased OC TN regardless depth. Importantly, three macrofauna fraction. More than 65% variations throughout can be explained by combination properties. Changes layer are likely due decrease pH increase arbuscular mycorrhizal fungi (AMF), those probably caused increases exchangeable Ca Mg, gram-negative (GN) bacteria. observed changes resulted from AMF, GN, (GP) bacteria, could Mg GN results indicate coexistence earthworms accelerate more fractions. This novel finding helps unlock processes complex systems serve sinks forests addresses importance maintaining C-neutral atmospheric climate change.

Language: Английский

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Influences of the Integrated Rice-Crayfish Farming System with Different Stocking Densities on the Paddy Soil Microbiomes

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(7), P. 3786 - 3786

Published: March 28, 2024

Integrated rice-fish farming has emerged as a novel agricultural production pattern to address global food security challenges. Aiming determine the optimal, scientifically sound, and sustainable stocking density of red claw crayfish (Cherax quadricarinatus) in an integrated rice-crayfish system, we employed Illumina high-throughput 16S rRNA gene sequencing evaluate impact different densities on composition, diversity, function, co-occurrence network patterns soil bacterial communities. The high reduced diversity evenness community during mid-culture stage. Proteobacteria, Actinobacteria, Chloroflexi most prevalent phyla throughout experimental period. Low initially boosted relative abundance Actinobacteria paddy soil, while did so middle final stages. There were 90 distinct functional groups identified across all samples, with chemoheterotrophy aerobic being abundant. favored these groups, whereas enhanced their abundances later stages cultivation. Medium led more complex mid- culture period showed significant correlations communities, total nitrogen (TN) phosphorus (TP) concentrations emerging primary factors contributing alterations In summary, our findings demonstrated that significantly impacted microbiomes environmental at varying densities. Our study contributed theoretical insights into profound various communities soils.

Language: Английский

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Intensity and Duration of Nitrogen Addition Jointly Alter Soil Nutrient Availability in a Temperate Grassland

Journal of Geophysical Research Biogeosciences, Journal Year: 2022, Volume and Issue: 127(3)

Published: Feb. 26, 2022

Abstract Increasing N input can alter soil nutrient availability and influence plant growth. Previous studies focused on addition effects P availability, while less other mineral nutrients. Besides, how duration affects has remained unclear. Based a simulative deposition experiment in typical steppe with four levels (0, 2, 10, 50 g m −2 yr −1 ) under three (2, 5, 10 years), we determined contents of nutrients surface soils. In the 0–10 cm soil, short‐term (2‐year) significantly increased exchangeable Ca (+7.2%) decreased Mg (−22.5%) as compared control, available Fe, Cu, Zn, but Mn remarkably (+80.4%). Medium‐term (5‐year) raised total Ca, Na Mg. The response patterns these were largely similar 10–20 weaker significant only at high inputs (50 ). Long‐term (10‐year) base cations (K, Na, Mg) micronutrients (Fe, Mn, Zn) by an average 32.1% 20.4%, respectively, across two depths. Influences pH growth showed remarkable differences among different addition. These findings indicate that intensity jointly this should be considered nutrient‐cycling modeling.

Language: Английский

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Effects of nitrogen and phosphorus additions on soil microbial community structure and ecological processes in the farmland of Chinese Loess Plateau

Journal of Arid Land, Journal Year: 2023, Volume and Issue: 15(8), P. 960 - 974

Published: Aug. 1, 2023

Language: Английский

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Nutrients in overlying water affect the environmental behavior of heavy metals in coastal sediments

Environmental Research, Journal Year: 2023, Volume and Issue: 238, P. 117135 - 117135

Published: Sept. 13, 2023

Language: Английский

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Organic materials with high C/N ratio: more beneficial to soil improvement and soil health

Biotechnology Letters, Journal Year: 2022, Volume and Issue: 44(12), P. 1415 - 1429

Published: Oct. 31, 2022

Language: Английский

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