Bagasse is potential high-value agricultural biomass resource.Single-factor experiments were conducted to investigate the factors including reaction duration,temperature,sulfuric acid concentration,the ratio of bagasse mass to the volume of sulfuric solution on the hydrolysis of bagasse for water-soluble carbon by hydrothermal method.The hydrolysis conditions were optimized through orthogonal experiments,which were reaction duration of 30 min,temperature of 180℃,sulfuric acid concentration of 5.5 mol/L and the ratio of bagasse mass to the volume of sulfuric solution of 1∶16,and the yield of organic matter from bagasse was 26.88%.Acid hydrolysis mechanism of bagasse originated from the break of chemical bonds at 3100 cm-1～3500 cm-1 and 1032.23 cm-1.Conclusions provided the scientific basis for the technology and application of water-soluble carbon fertilizers from bagasse.
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