ArticleScientific reports2026
Impact of long-term straw and manure incorporation on carbon sequestration and yield through alteration of aluminum and iron oxides in acidic red soil.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Soil acidification and carbon sequestration are central challenges for sustainable agriculture, particularly across China's extensive acidic red soil regions, which comprise 32.4% of the national soil area. This study evaluated the long-term effects of straw and manure incorporation on aluminum (Al) and iron (Fe) oxide fractions, soil organic carbon (SOC) sequestration, and crop yield in acidic red upland soil. A 33-year field experiment was conducted with four treatments: no fertilizer (CK), chemical fertilizer (NPK), NPK plus straw (NPKS), and NPK plus manure (NPKM). Soil samples were collected from three depths (0-10, 10-20, and 20-30 cm), and Al and Fe oxide fractions were quantified. Relationships among Al/Fe fractions, soil pH, and SOC were assessed using ANOVA, Pearson's correlation, and Redundancy Analysis (RDA). Compared with CK, NPKM increased reactive Al (Alo) by 43.84%, 42.94%, and 43.06% and reactive Fe (Feo) by 132.98%, 91.54%, and 55.75% at 0-10, 10-20, and 20-30 cm, respectively. The highest carbon sequestration rate (0.21 t ha
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