DATA - Pyrolysis-driven stabilization and micronutrient partitioning in poultry waste–derived biochars

This dataset provides the complete experimental evidence supporting the article “Pyrolysis-driven stabilization and micronutrient partitioning in poultry waste–derived biochars”. It documents how increasing pyrolysis temperature regulates carbon structural transformation, mineral enrichment, and the partitioning between total and bioavailable micronutrient pools in poultry waste–derived materials. The dataset includes raw poultry waste (PW) and biochars produced by slow pyrolysis at 300 °C (BPW300) and 600 °C (BPW600). For each material, the repository contains raw and processed measurements of biochar yield, pH, electrical conductivity, moisture content, volatile matter, ash content, fixed carbon, and easily oxidizable organic carbon. Elemental composition data (C, H, N, S, and O) and derived atomic ratios (H/C, O/C, and (O+N)/C) are provided to quantify carbon condensation, aromaticity, and chemical stability. Comprehensive macro- and micronutrient datasets are included, covering total concentrations of Na, Mg, P, Ca, K, Mn, Fe, Cu, and Zn determined by acid digestion and ICP-MS. In addition, chemically extractable (DTPA-extractable) fractions of Mn, Fe, Cu, and Zn are reported as indicators of potential bioavailability. Relative bioavailable fractions (% of total) are provided to explicitly resolve pyrolysis-driven micronutrient immobilization and stabilization processes. The repository also contains the multivariate data matrix used for principal component analysis (PCA), enabling integrated assessment of physicochemical properties, carbon structural indicators, and nutrient redistribution across treatments. Summary statistics (mean ± standard deviation; n = 3) and complete R scripts used for ANOVA, post hoc testing, PCA, and figure generation are included to ensure full computational reproducibility. Overall, this dataset enables independent verification of the reported results and supports secondary analyses on biochar design, nutrient stabilization mechanisms, environmental risk mitigation, and circular management of livestock residues. It is intended for reuse in soil science, environmental chemistry, waste valorization, and climate-smart agriculture research.