04738naa a2200301 a 450000100080000000500110000800800410001902200140006002400550007410000230012924501550015226000090030730000100031652037760032665300300410265300240413270000230415670000240417970000250420370000200422870000180424870000230426670000240428970000200431370000210433370000190435477300630437321874392026-06-10       2026    bl uuuu     u00u1 u    #d  a0301-47977 ahttps://doi.org/10.1016/j.jenvman.2026.1292252DOI1 aNOGUEIRA, D. C. S.  aMapping of CO2 emissions and soil attributes under a silvopastoral system and degraded pasture in the Brazilian Cerrado Region.h[electronic resource]  c2026  a12 p.  aLand use and soil characteristics, such as texture and mineralogy, influence the soil's capacity to store or release carbon in the form of CO2 (C–CO2). This capacity depends on organo-mineral associations, which include various minerals and Fe and Al oxides, with the ability to adsorb organic carbon in the soil. Conservationist systems, such as the silvopastoral system, play a crucial role in mitigating CO2 emissions and sequestering carbon, as they tend to promote a continuous input of organic material into the soil. In this context, this study aimed to map and evaluate the relationship between soil texture and mineralogy with carbon stocks (CS), cumulative soil CO2 emission (CE), and soil attributes under a silvopastoral system (SPS) and degraded pasture (DP) in the Cerrado of central Brazil. The study areas are located in a Cerrado region in the municipality of Selvíria, in the state of Mato Grosso do Sul, Brazil. FCO2, soil moisture (Ms), and soil temperature (Ts) were monitored from May to October 2018. Soil samples were collected at depths of 0.00–0.10 m and 0.30–0.40 m for analysis of their attributes. Soil carbon stability was determined using the k-factor as a comparative index for assessing relative carbon stability, which is the ratio between FCO2 and CS. SPS presented higher cumulative soil CO2 emissions during the study period and soil moisture (10.25 Mg C–CO2 ha 1 and 21.67%) compared to the degraded pasture (8.11 Mg C–CO2 ha 1 and 12.14%), as well as higher carbon stocks (21.34 Mg ha 1 and 12.49 Mg ha 1) compared to the degraded pasture (11.59 Mg ha 1 and 8.12 Mg ha 1) at both soil depths. Higher HLIFS values were associated with lower CS values observed in DP, indicating that carbon is more recalcitrant, a characteristic of degraded areas. The greater carbon stability in SPS can be attributed to more oxidic mineralogy (Fed =54.91 g kg 1 and Feo =4.35 g kg 1) compared to DP (Fed =16.72 g kg 1 and Feo =0.61 g kg 1). The spatial variability of CE, Ts, and Ms was higher in SPS throughout the eight weeks of evaluation compared to DP due to the lower range values observed in SPS. A correlation between the CE and Ts maps was observed only on two evaluation days in DP. CS and HLIFS showed lower range values in SPS (7.20, 8.30, and 22.80 m) compared to DP (21.20, 40.10, and 46.60 m), indicating greater spatial variability in SPS. DP showed spatial correlations between the cumulative soil CO2 emission (CE) and the k-factor (0.42), CS and macroporosity ( 0.40), HLIFS and bulk density (Ds) ( 0.48), the k-factor and Ds ( 0.41), and the k-factor and clay content ( 0.40). SPS showed spatial correlations between CE and the k-factor (0.68), CE and clay content (0.49), CS and HLIFS ( 0.56), the k-factor and air-filled pore space (AFPS) ( 0.51), the k-factor and macroporosity (0.46), the k-factor and microporosity ( 0.41), the k- factor and Ms (0.43), and the k-factor and clay content (0.41). The clay texture and higher presence of iron oxides in the silvopastoral system favored greater carbon stocks, thus indicating this area as beneficial to carbon conservation in the soil. This study presents a methodological innovation by integrating high-resolution soil CO emission mapping with detailed mineralogical characterization and carbon quality indicators. By combining spatial analysis of soil CO 2 fluxes, Fe-oxide and clay mineral assessments, and spectroscopic evaluation of organic matter quality, the approach provides a multidimensional understanding of the mechanisms controlling carbon stock stabilization. This integrated framework is rarely applied in tropical grazing systems and offers a more comprehensive evaluation of how soil mineralogy and carbon chemistry jointly influence CO 2 dynamics.  aMato Grosso do Sul Brazil  aSpatial variability1 aPEREIRA, D. dos S.1 aMORAES, M. L. T. de1 aCHIQUITELLI NETO, M.1 aMOITINHO, M. R.1 aMONTANARI, R.1 aMARQUES JUNIOR, J.1 aMILORI, D. M. B. P.1 aLA SCALA JR, N.1 aPAZ-GONZALEZ, A.1 aPANOSSO, A. R.  tJournal of Environmental Managementgv. 403, 129225, 2026.