Effects of cropland abandonment succession on soil microorganism and multifunctionality in the arid zone of Northwest China

Applied Soil Ecology, Год журнала: 2025, Номер 207, С. 105954 - 105954

Опубликована: Фев. 10, 2025

Язык: Английский

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Contrasting contributions of microbial and plant-derived C to soil carbon in desertified grassland restoration

Agriculture Ecosystems & Environment, Год журнала: 2025, Номер 385, С. 109579 - 109579

Опубликована: Фев. 20, 2025

Язык: Английский

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Multivariate Insight into Soil Organic Matter Dynamics in Subarctic Abandoned Farmland by the Chronosequence Approach

Agronomy, Год журнала: 2025, Номер 15(4), С. 893 - 893

Опубликована: Апрель 3, 2025

Agricultural land abandonment is a widespread phenomenon found in many regions of the world. There are studies on post-agricultural changes temperate, arid, semi-arid regions, etc., but such soils boreal or Arctic conditions rare. Our study aims to fill gaps research processes soil transformation, with focus harsh climatic and Subarctic regions. Parameters organic matter (SOM) largely reflected quality soil, this investigates dynamics SOM properties agricultural process post-agrogenic transformation long-term fertilization. Using chronosequence approach (0–25 years abandonment) reference site over 90 fertilization, we performed elemental (CHN-O) analysis, solid-state 13C NMR spectroscopy SOM, PXRD parent material, multivariate statistical analysis identify connections between composition other properties. The results revealed transient increases carbon (SOC) during early (5–10 years; 3.75–4.03%), followed by significant declines after 25 (2.15–2.27%), driven mineralization quartz-dominated lacking reactive minerals for organo-mineral stabilization. (the Yamal Station) maintained stable SOC (3.58–3.83%) through inputs, compensating poor mineralogical protection. highlighted shifts from labile alkyl-C (40.88% active fields) oxidized O-alkyl-C (21.6% late lignin-derived aryl-C (15.88% at middle abandonment), reflecting microbial processing humification. Freeze–thaw cycles quartz dominance mineralogy exacerbated vulnerability, while fertilization sustained (39.61%) balanced C:N (19–20) ratios. Principal Component Analysis linked loss declining nutrient retention showed be reliant physical occlusion biochemical recalcitrance, both vulnerable freeze–thaw that disrupt aggregates. These findings underscore fragility agroecosystems, emphasizing necessity amendments counteract limitations stress.

Язык: Английский

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Bioenergetic stability of organic matter in forest and grassland soil (Haplic luvisol)

Lomonosov Soil Science Journal, Год журнала: 2025, Номер 80(№2, 2025), С. 63 - 72

Опубликована: Май 16, 2025

The stability of soil organic matter (SOM) is the trade-off between its bioenergetic profits for microorganisms and energy barrier decomposition. density activation energy, which determine SOM in topsoil (0–30 cm), belowground biomass litter forest grassland ecosystems, were determined by thermogravimetryand differential scanning calorimetry. Organic was fractionated into pools based on their thermal — labile, stable, persistent. decomposition persistent 2.8 times higher than labile SOM. There more per unit thermally stable grassland. Therefore, availability ecosystems suggested a faster carbon turnover compared to soils. Forest accumulated 1.5 soil. ratio characterized potential advantage substrate microorganisms, could be used characterize quality as an addition widely C:N ratio. transformation accompanied decrease increase density. These identified processes underline leading role progressive selective stabilization microbial metabolites formation

Язык: Английский

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Glucoproteins in particulate and mineral-associated organic matter pools during grassland restoration

CATENA, Год журнала: 2024, Номер 247, С. 108480 - 108480

Опубликована: Окт. 23, 2024

Язык: Английский

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