摘要：采用黄孢原毛平革菌处理不同粒度的玉米秸秆，测定了秸秆降解率、木质素降解率、有机质、总腐殖酸、H/F、羧基和酚羟基含量，探讨了秸秆处理过程中的腐解特征。结果表明，在秸秆腐解过程中，腐解物的质量、有机质、木质素含量逐渐降低，其分解率和分解时间与秸秆粒度具有相关性；H/F总体呈上升趋势，腐殖化程度升高；酚羟基含量逐渐降低，羧基含量逐渐升高。这些现象表明秸秆的腐解过程为氧化过程，酚羟基被氧化为羧基。

Abstract: In this paper, corn stalks with different granularities were treated by Phanerochaete chrysosporium, and discussed the decomposition characteristics of the stalk by the measurement of the decomposition rates of stalk and lignin, and the total amount of organic matters, humic acid, H/F, carboxyl and phenolic hydroxyl groups. The results showed that the quantities of the stalk, organic matter, and lignin gradually decreased during the decomposition process. There was a significant relationship between the decomposition rate and time and the particle size of the stalk. Furthermore, humic degree increased with H/F increasing, while the content of phenolic hydroxyl decreased, and carboxyl content increased. These results indicated the decomposition process of the stalk is an oxidation one that phenolic hydroxyl is oxidized to be carboxyl.