腐殖化系数 是指定量加入土壤中的植物残体（以碳量计）腐解一年后的残留量(以碳量计)与原加入量的比值。一般用腐殖化系数来度量动、植、微生物残体在微生物作用下，通过生化和化学作用形成腐殖质的程度。
其中含木素较多的植物残体，表现为腐殖化系数较高，含氮多的植物残体，则有利于土壤微团聚体的形成。
The plant residue with more lignin has a higher humification coefficient. As the residue containing more N is more favorable to the formation of soil microaggregate.
各区间的腐殖化系数并不随气候而呈规律性变异，而主要是环境因子综合作用的结果，特别是土壤性质有显著影响。
Humification coefficient did not changed proportionately with temperature and rainfall and was multiply influenced by environmental factors, especially soil properties.
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