IMPACTO DA INTEGRAÇÃO LAVOURA-PECUÁRIA NO CICLO DO CARBONO E HUMIFICAÇÃO EM SOLOS DO CERRADO BRASILEIRO
IMPACTO DA INTEGRAÇÃO LAVOURA-PECUÁRIA NO CICLO DO CARBONO E HUMIFICAÇÃO EM SOLOS DO CERRADO BRASILEIRO
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Palavras-chave: ácido fúlvico; ácido húmico; integração.
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Keywords: fulvic acid; humic acid; integration.
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Abstract: The Cerrado, recognized for its biodiversity and ecological fragility, is considered a global hotspot. Deep soils like Quartzarenic Neosols, covering 15.2% of the biome, have been exploited due to the growing demand for cropland, despite their low agricultural potential. Approximately half of the Cerrado’s original area has been converted into pastures and annual crops, impacting soil organic matter (SOM), nutrient cycling, and carbon cycle balance. In this context, the crop-livestock integration (CLI) system is a promising approach for the sustainable recovery of these soils, improving their physical, chemical, and biological properties. Humic substances (HS) play a key role in this process, regulating mineralization and humification, essential for carbon sequestration and soil health. This study evaluated the impact of the CLI system on sandy soils in the Brazilian Cerrado, specifically in Quartzarenic Neosol areas in Mato Grosso do Sul. The HS were characterized using Vibrational Spectroscopy (ATR-FTIR), showing that the CLI system promoted the formation of more stable humic structures. Integrated management favored the efficiency of the humification process, which is essential for agricultural sustainability in the Cerrado, highlighting the importance of more diversified systems in the input, stabilization, and accumulation of SOM.
- Everaldo Zonta
- Ayhessa C. S. de Lima
- Samuel A. Lopes
- Raphaella E. Cantarino
- Júlia B. M. Granja
- Ademir Fontana
- Andrés C. Garcia