Abstract: Effects of fertilizer application on the carbon emission and iron content in soil of a jasmine flower garden were investigated at Difengjiang Jasmine Garden in Fuzhou. Based on the application normally used by the trade, 4 levels of fertilization were implemented, i.e., control (C), normal (N), of N (H), and 2x of N (D). The results showed that the average hourly CO₂ fluxes at various lots were(430.88±142.06) mg·m^-2 for C, (473.08±52.18) mg·m^-2 for H, (435.23±61.21) mg·m^-2 for N, and (478.75±118.64) mg·m^-2 for D. The average CH₄ emission rateswere (38.84±9.69) μg·m^-2·h^-1 for C, (16.77±10.71) μg·m^-2·h^-1 for H, (4.11±4.79) μg·m^-2·h^-1 for N, and(11.92±2.27) μg·m^-2·h^-1 for D. Thus, the CO₂ flux increased by 9.7% for H, 1.01% for N, and 11.10% for D over control, while the CH₄ flux reduced by 56.82% for H, 89.41% for N, and 69.30% for D over control. The average total Fe contents were(9.11±0.08) g·kg^-1 for C, (7.87±0.09) g·kg^-1 for H, (9.37±0.25) g·kg^-1 for N, and (8.90±0.21) g·kg^-1 for D; theaveraged Fe²⁺ content, (1.08±0.01) g·kg^-1 for C, (1.08±0.07) g·kg^-1 for H, (1.01±0.09) g·kg^-1 for N, and(1.09±0.04) g·kg^-1 for D; and, while the average Fe³⁺ content, (8.04±0.08) g·kg^-1 for C, (6.80±0.15) g·kg^-1 for H, (8.37±0.19) g·kg^-1 for N, and(7.82±0.22) g·kg^-1 for D. The total Fe contents decreased by 13.61% for H and 2.30% for D, while increased by 2.85% for N over control. The Fe²⁺ content decreased by 6.48% for N; and, Fe³⁺ contents increased by 4.10% for N, and decreased by 15.42% for H and 2.73% for D over control. A correlation analysis indicated that the carbon emission fromthe lots treated with C, N, and D significantly inversely correlated with the Fe³⁺ and total Fe contentsat(P < 0.01), whereas H, at P < 0.05.