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Updated: Feb 25, 2026

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

Published on: September 11, 2016

気候を横断する土壌微生物ネクロマスの持続性における施肥と乾燥遺産の決定要因

Li-Xin Xu¹, Guang-Hui Yu¹, Cong-Qiang Liu¹

¹Institute of Surface-Earth System Science, School of Earth System Science, Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim, Tianjin University, Tianjin, China.

Global change biology

|February 24, 2026

Abstract:

Microbial necromass-mineral interactions are vital for soil organic carbon (C) persistence, but their response to concurrent climate and fertilization legacies in croplands remains unclear. Using six long-term field sites (27-38 years) across a pronounced aridity gradient, we show that stabilization of microbial necromass is coupled with short-range ordered (SRO) minerals in humid zones (aridity index, AI < 1.3). In arid zones (AI > 1.3), this correlation strongly weakens, challenging the universality of SRO-associated C paradigms. While aridity controls mineral weathering and SRO abundance, we showed that long-term fertilization can supersede aridity-driven constraints on necromass C accrual. Spatial mapping of 6060 in situ μ-FTIR spectra revealed reduced organic C transformation in outer aggregate rims under aridity, aligning with diminished microbial processing and a consequent weakening of necromass-SRO associations. Our findings establish soil moisture as a critical regulator of fertilization-induced ecological memory in mineral-necromass interactions, urging climate-tailored practices to sustain soil C resilience in water-limited ecosystems under global aridification.

キーワード:

アミノ糖腐植化指数レガシー効果長期施肥ネクロマスと鉱物の相互作用反応性鉱物 μ-FTIR

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Temperature Response of Soil Organic Matter Decomposition Rates: Construction and Applications of a Temperature Gradient Block

Temperature Response of Soil Organic Matter Decomposition Rates: Construction and Applications of a Temperature Gradient Block

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