음폐혼합펠렛퇴비가 밭 토양의 탄소 형태 및 배추 생육에 미치는 영향

Abstract

This study investigated the effects of applying food waste with biochar pellet compost (FWCB) on soil carbon fractions and crop productivity in upland field. A field experiment using Kimchi cabbage (Brassica rapa L.) was conducted under five treatments, including FWCB and conventional fertilization regimes. FWCB treatment significantly improved crop growth, with fresh weight and yield increasing by 38% and 27%, respectively, compared to 100% NPK treatment, despite using only 50% of the inorganic fertilizer. Soil organic carbon stock was also highest in the FWCB treatment (28.78 t C ha-1), followed by the FWC (23.72 t C ha-1) and NPK treatments. Fractionation analysis revealed that FWCB application increased both labile (WEC, HWEC) and recalcitrant carbon forms (fulvic acid and humic acid), indicating enhanced carbon stabilization. These results suggest that FWCB not only boosts crop productivity but also enhances long-term soil carbon sequestration by enriching stable carbon fractions. Therefore, FWCB can serve as an effective strategy to improve soil fertility and mitigate greenhouse gases (GHGs) in upland agriculture while reducing dependency on chemical fertilizers.