Dataset of greenhouse gas fluxes and soil properties from a biochar application frequency and dosage experiment in an upland agroecosystem in Guizhou, China (2020-2023)

O) measured using the static chamber-gas chromatography method. It also provides a profile of soil biophysiochemical properties, including soil organic carbon, bulk density, water content, pH, electrical conductivity, soil available nutrients (available nitrogen, phosphorus, and potassium), soil microbial biomass carbon and nitrogen, and the activities of four enzymes (phosphatase, sucrase, catalase, urease). This dataset captures the interactions between soil biogeochemistry and management practices over an extended period. It serves as a useful resource for biogeochemical model calibration, meta-analyses, and the development of sustainable biochar management strategies aimed at climate change mitigation in agricultural soils.