凤阳山主要林分类型土壤根系分布特征研究

Distribution characteristics of soil root system of main forests in Fengyang Mountain

在浙江省凤阳山自然保护区选取4种典型林分类型(常绿阔叶林、杉木林、针阔混交林、常绿落叶阔叶混交林)为对象,在各样地中用土柱法采取不同土层的土壤根系,分析了不同林分类型土壤根系分布情况及不同土层根系变化特征,结果表明,在4种林分类型中,杉木林的根生物量、根体积、根密度及根表面积指标均为最小,常绿阔叶林和常绿落叶阔叶混交林均为最大或次大;比根长则是杉木林最大,常绿阔叶林和常绿落叶阔叶混交林最小。平均直径是常绿阔叶林和常绿落叶阔叶混交林最大,杉木林次之,针阔混交林最小。

We selected four typical forests（ evergreen broad-leaved forest,fir forest,coniferous forest,evergreen deciduous broad-leaved forest）,and set up to 20m＊ 20 m plots in Fengyang Mountain Nature Reserve,Zhejiang Province. We collected soil roots in different soil layers by soil column method and analyzed the distribution and characteristics of roots in different soil types. The results show that in the 4 forest types,root biomass,root volume and root density and root surface area indices in Chinese fir forest were the smallest,evergreen broad-leaved forest and evergreen and deciduous broad-leaved mixed forest were the largest or second largest; Chinese fir forest’s specific root length was the largest,evergreen broad-leaved forest and evergreen and deciduous broad-leaved mixed forest was the minimum. The average diameter was the largest of the mixed forest of evergreen broad leaved forest and evergreen deciduous broad-leaved forest,Chinese fir forest took second place,mixed forest of coniferous and broad-leaved forest was the lowest.