Result shows that monomial exponential attenuation model can be used to simulate decay process of fallen woods. The decomposition constant of Abies fallen wood is 0.0168/a(r 2=0.9483),while fallen wood of Picea is 0.0150/a(r 2=0.8895).

• 研究表明 ；云冷杉倒木的腐烂分解过程符合单项指数衰减模型 ；冷杉倒木的分解常数为 0 .；0 1 6 8/a( r2 =0