通过对杉木连栽林地土壤腐殖质研究表明,由于连栽后,土壤的理化性质及微生物区系发生变化,形成的腐殖质的质和量有明显的差异:(1)腐殖质在剖面中含量分布:从上到下,连栽林地中,多代(三代以上)、下降最快,二代次之,一代平缓,混交林地中,以柳 Through the study on the soil humus in the continuous plantation of Cunninghamia lanceolata, the physicochemical properties and microbial flora of the soil changed after the continuous planting, the quality and quantity of the formed humus were obviously different: (1) The content distribution of the humus in the section was from Up and down, and even in the planting of land, many generations (more than three generations), the fastest decline, followed by second generation, generation of gentle, mixed forest, with willow