Microbial necromass in cropland soils: A global meta‐analysis of management effects

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(7), P. 1998 - 2014

Published: Feb. 7, 2023

Abstract Microbial necromass is a large and persistent component of soil organic carbon (SOC), especially under croplands. The effects cropland management on microbial accumulation its contribution to SOC have been measured in individual studies but not yet summarized the global scale. We conducted meta‐analysis 481‐paired measurements from soils examine identify optimal conditions for accumulation. Nitrogen fertilization increased total C by 12%, cover crops 14%, no or reduced tillage (NT/RT) 20%, manure 21%, straw amendment 21%. was independent biochar addition. NT/RT fungal more than bacterial necromass. Manure higher fungal, leading decreased ratio fungal‐to‐bacterial Greater increases after amendments were common semi‐arid cool climates with pH <8, proportional amount input. In contrast, mainly warm humid climates. application irrespective properties climate. Management strong when applied during medium (3–10 years) long (10+ periods larger initial contents, absent sandy soils. Close positive links between biomass, indicate important role stabilized products accrual. increment (accumulation efficiency) NT/RT, crops, ranged 45% 52%, which 9%–16% N fertilization. summary, long‐term enhancing accumulation, optimizing sequestration requires site‐specific management.

Language: Английский

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Microbially mediated mechanisms underlie soil carbon accrual by conservation agriculture under decade-long warming

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 8, 2024

Abstract Increasing soil organic carbon (SOC) in croplands by switching from conventional to conservation management may be hampered stimulated microbial decomposition under warming. Here, we test the interactive effects of agricultural and warming on SOC persistence underlying mechanisms a decade-long controlled experiment wheat-maize cropping system. Warming increased content accelerated fungal community temporal turnover agriculture (no tillage, chopped crop residue), but not (annual residue removed). Microbial use efficiency (CUE) growth linearly over time, with stronger positive after 5 years agriculture. According structural equation models, these increases arose greater inputs crops, which indirectly CUE via changes communities. As result, necromass 28 53%, emerging as strongest predictor content. Collectively, our results demonstrate how climatic factors can interact alter composition, physiology functions and, turn, formation accrual croplands.

Language: Английский

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Nitrogen fertilizer builds soil organic carbon under straw return mainly via microbial necromass formation

Soil Biology and Biochemistry, Journal Year: 2023, Volume and Issue: 188, P. 109223 - 109223

Published: Oct. 22, 2023

Language: Английский

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Integrating microbial community properties, biomass and necromass to predict cropland soil organic carbon

ISME Communications, Journal Year: 2023, Volume and Issue: 3(1)

Published: Aug. 23, 2023

Manipulating microorganisms to increase soil organic carbon (SOC) in croplands remains a challenge. Soil microbes are important drivers of SOC sequestration, especially via their necromass accumulation. However, microbial parameters rarely used predict cropland stocks, possibly due uncertainties regarding the relationships between pools, community properties and SOC. Herein we evaluated (diversity network complexity), pools (biomass carbon) 468 soils across northeast China. We found that not only but also complexity) biomass were correlated with Microbial diversity played more role predicting for maize, while complexity was rice. Models performed better when included simultaneously. Taken together our results suggest influence accumulation croplands, management practices improve these may levels.

Language: Английский

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Conservation agriculture improves soil health and sustains crop yields after long-term warming

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Oct. 10, 2024

Climate warming threatens global food security by exacerbating pressures on degraded soils under intensive crop production. Conservation agriculture is promoted as a sustainable solution that improves soil health and sustains yields in changing climate, but these benefits may be affected long-term warming. Here, we investigate the effects of conservation compared to conventional 17 properties, microbial diversity yields, during eight-years' experimental An overall positive effect over time characterized linear increases organic carbon biomass carbon. Warming-triggered shifts fungal (saprogen richness) are directly linked 9.3% increase wheat eight years, only agriculture. Overall, results an average 21% supports similar levels production after Our work provides insights into potential for because improved resilience climate

Language: Английский

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Conservation agriculture boosts topsoil organic matter by restoring free lipids and lignin phenols biomarkers in distinct fractions

Soil and Tillage Research, Journal Year: 2025, Volume and Issue: 248, P. 106463 - 106463

Published: Jan. 24, 2025

Language: Английский

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Contributions of Beneficial Microorganisms in Soil Remediation and Quality Improvement of Medicinal Plants

Plants, Journal Year: 2022, Volume and Issue: 11(23), P. 3200 - 3200

Published: Nov. 23, 2022

Medicinal plants (MPs) are important resources widely used in the treatment and prevention of diseases have attracted much attention owing to their significant antiviral, anti-inflammatory, antioxidant other activities. However, soil degradation, caused by continuous cropping, excessive chemical fertilizers pesticide residues heavy metal contamination, seriously restricts growth quality formation MPs. Microorganisms, as major biota soil, play a critical role restoration land ecosystem. Rhizosphere microecology directly or indirectly affects development, metabolic regulation active ingredient accumulation Microbial resources, with advantages economic efficiency, harmless environment non-toxic organisms, been recommended promising alternative conventional pesticides. The introduction beneficial microbes promotes adaptability MPs adversity stress enhancing fertility, inhibiting pathogens inducing systemic resistance. On hand, it can improve medicinal removing pollutants, reducing absorption harmful substances regulating synthesis secondary metabolites. ecological benefits microbiome agricultural practices increasingly recognized, but current understanding interaction between conditions, root exudates microbial communities mechanism rhizosphere affecting metabolism is still quite limited. More research needed investigate effects on different species. Therefore, present review summarizes main issues plant cultivation, functions remediation promotion potential further guide use promote cultivation sustainable development

Language: Английский

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Decades of reforestation significantly change microbial necromass, glomalin, and their contributions to soil organic carbon

Agriculture Ecosystems & Environment, Journal Year: 2023, Volume and Issue: 346, P. 108362 - 108362

Published: Jan. 17, 2023

Language: Английский

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Turnover of bacterial biomass to soil organic matter via fungal biomass and its metabolic implications

Soil Biology and Biochemistry, Journal Year: 2023, Volume and Issue: 180, P. 108995 - 108995

Published: Feb. 27, 2023

Language: Английский

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Climate warming alters the relative importance of plant root and microbial community in regulating the accumulation of soil microbial necromass carbon in a Tibetan alpine meadow

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(11), P. 3193 - 3204

Published: March 2, 2023

Climate warming is predicted to considerably affect variations in soil organic carbon (SOC), especially alpine ecosystems. Microbial necromass (MNC) an important contributor stable pools. However, accumulation and persistence of MNC across a gradient are still poorly understood. An 8-year field experiment with four levels was conducted Tibetan meadow. We found that low-level (+0-1.5°C) mostly enhanced bacterial (BNC), fungal (FNC), total compared control treatment layers, while no significant effect caused between high-level (+1.5-2.5°C) treatments treatments. The contributions both BNC were not significantly affected by depths. Structural equation modeling analysis demonstrated the plant root traits on strengthened intensity, influence microbial community characteristics waned along warming. Overall, our study provides novel evidence major determinants production stabilization may vary magnitude meadows. This finding critical for updating knowledge storage response climate

Language: Английский

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