梵净山自然保护区林地土壤重金属分布与富集特征.

[Objective]The aim of this paper is to provide the basic information and decision basis for rare plant conservation and tourism sustainable development in Fanjing Mountain Nature Reserve. [Method]The heavy metals in woodland soil with different profile, elevation and vegetation type in Fanjing Mountain Nature Reserve are investigated and evaluated and the enrichment characteristics is discussed by enrichment factor method. [Result] Cd and Pb content in soil decreases with increase of soil depth but Cu content in soil increases with increase of soil depth. Cr content in soil presents a decrease-increase-decrease trend with increase of elevation. Cd content in soil presents a first increase and then decrease trend with increase of elevation. Pb, Cu, H and As content in soil presents an increase-decrease-increase trend with increase of elevation. The content of heavy metals in soil with Taxus chine ns is , Euonynus hamiltonianus, Rhododendron and Davidia in-volucrata vegetation is Cr > Pb > Cu > As > Cd > Hg. The content of heavy metals in soil with Abies fanjingshanensis vegetation is Pb > Cr > Cu > As > Cd > Hg. The enrichment factor of Cu, Cd, Hg and Pb in soil with 0 - 20 , 20 - 40 and 40 - 60 cm depth is > 1. The enrichment factor of Cd, Pb and Hg in soil with an elevation of 500 - 1000. 1001 - 1500, 1501-2000 and >2000 m is > 1. The enrichment factor of Cu and As with an elevation of > 2000m is > 1. The enrichment factor of Cr with an elevation of 500 - 1000 m is > 1. The enrichment factor of Cr, Cd, Pb and Hg in soil with T. chinensis, E. hamiltonianus and I), involucrata vegetation is > 1. The enrichment factor of Cr,Cu, Cd, Hg and As in soil with Rhododendron vegetation is > 1. The enrichment factor of Cu, Cd, Hg and As in soil with A. fanjingshanensis vegetation is > 1. The soil of woodland in Fanjing Mountain Nature Reserve is mainly affected by Cd, Pb and Hg. [ABSTRACT FROM AUTHOR]