highly significantp < 0.01
Among them, alkyl carbon, aromatic carbon and phenol carbon demonstrated a highly significant positive correlation with the straw decomposition rate ( r = 0.730–0.870, p < 0.01), while alkoxy carbon exhibited a highly significant negative correlation with the decomposition rates of straw, cellulose, hemicellulose, and lignin ( r = 0.785–0.871, p < 0.01).