Multivariate Insight into Soil Organic Matter Dynamics in Subarctic Abandoned Farmland by the Chronosequence Approach DOI Creative Commons
Timur Nizamutdinov, Sizhong Yang, Xiaodong Wu

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(4), P. 893 - 893

Published: April 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.

Language: Английский

Multivariate Insight into Soil Organic Matter Dynamics in Subarctic Abandoned Farmland by the Chronosequence Approach DOI Creative Commons
Timur Nizamutdinov, Sizhong Yang, Xiaodong Wu

et al.

Agronomy, Journal Year: 2025, Volume and Issue: 15(4), P. 893 - 893

Published: April 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.

Language: Английский

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