Effects of Cover Crops and Soil Amendments on Soil CO2 Flux in a Mississippi Corn Cropping System on Upland Soil

Agroecosystems, accounting for more than one-third of arable land worldwide, play an essential role in the terrestrial carbon (C) cycle. The development agricultural practices, which maximize soil C sequestration from atmosphere, is receiving growing attention due to recognition agroecosystems’ great potential serve as sinks atmospheric dioxide (CO2). In particular, cover crop and amendment applications are generating much interest mitigating climate change enhancing ecosystem services. objective this study was evaluate effects winter amendments, including broiler litter (BL), flue gas desulfurization (FGD) gypsum lignite, on CO2 flux cropping systems southeastern USA, where related studies were limited. A field conducted 2019 2021 a Mississippi upland corn system with measurements flux, moisture temperature during cash seasons. We observed high temporal variability peaks between late June early July, likely changes moisture. significant increase found BL application (p < 0.05). Co-application FGD lignite BL-reduced by 15–23% but did not fully eliminate rising effects. Significantly higher lower fields crops those without third year 0.05), attributed organic content accumulated crops. Future research should assess year-round greenhouse fluxes both seasons using resolution measurement scheme.