Depth‐dependent responses of soil organic carbon under nitrogen deposition

Global Change Biology, Год журнала: 2024, Номер 30(3)

Опубликована: Март 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

Язык: 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, Год журнала: 2025, Номер 377, С. 124744 - 124744

Опубликована: Март 1, 2025

Язык: Английский

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

Environmental Research, Год журнала: 2024, Номер 246, С. 118126 - 118126

Опубликована: Янв. 8, 2024

Язык: 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, Год журнала: 2024, Номер 242, С. 108132 - 108132

Опубликована: Июнь 1, 2024

Язык: Английский

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

Forest Ecosystems, Год журнала: 2024, Номер 11, С. 100172 - 100172

Опубликована: Янв. 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.

Язык: 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, Год журнала: 2024, Номер 25(7), С. 3786 - 3786

Опубликована: Март 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.

Язык: 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, Год журнала: 2022, Номер 127(3)

Опубликована: Фев. 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.

Язык: Английский

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High soil bacterial diversity increases the stability of the community under grazing and nitrogen

Soil and Tillage Research, Год журнала: 2024, Номер 248, С. 106414 - 106414

Опубликована: Дек. 10, 2024

Язык: Английский

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

Biotechnology Letters, Год журнала: 2022, Номер 44(12), С. 1415 - 1429

Опубликована: Окт. 31, 2022

Язык: 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, Год журнала: 2023, Номер 15(8), С. 960 - 974

Опубликована: Авг. 1, 2023

Язык: Английский

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