梵净山自然保护区林地土壤重金属分布与富集特征

发布时间：2018-03-13 10:20

本文选题：梵净山　切入点：土壤　出处：《西南农业学报》2017年10期 　论文类型：期刊论文

【摘要】：【目的】为梵净山珍稀植物保育及保护区旅游开发可持续发展提供基础资料和决策依据。【方法】以梵净山自然保护区林地土壤为研究对象,按剖面、海拔及植被对林地土壤重金属进行调查与评价,并通过富集因子法探讨其富集特征。【结果】Cd和Pb随土壤深度的增加而减小,Cu随土壤深度的增加而增加;Cr随海拔增高先减小后增加再减小,Cd随海拔增高先增加后减小,Pb、Cu、Hg及As随海拔增高先增加后减小再增加;红豆杉、西南卫矛、杜鹃与珙桐4种植被下重金属含量依次为CrPbCuAsCdHg;梵净山冷杉植被下重金属含量依次为PbCrCuAsCdHg。0~20、20~40与40~60 cm的Cu、Cd、Hg和Pb的富集因子(EF)1;Cd、Pb、Hg在海拔500~1000、1001~1500、1501~2000及2000 m的EF1,Cu和As在2000 m的EF1,Cr在海拔500~1000 m的EF1;红豆杉、西南卫矛与珙桐下Cr、Cd、Pb及Hg的EF1,杜鹃下Cr、Cu、Cd、Pb、Hg及As等的EF1,梵净山冷杉下Cu、Cd、Pb、Hg及As等的EF1,即相对富集。梵净山自然保护区林地土壤主要受到Cd的影响,其次是Pb和Hg。
[Abstract]:[objective] to provide basic information and decision basis for the conservation of rare plants and sustainable development of tourism in Fanjing Mountain. [methods] the soil of forest land in Fanjingshan Nature Reserve was taken as the research object, according to the profile, The investigation and evaluation of heavy metals in forestland soil by elevation and vegetation were carried out. The enrichment characteristics of CD and Pb were discussed by means of enrichment factor method. [results] CD and Pb decreased with the increase of soil depth and increased with the increase of soil depth. The content of PbCU Hg and as increased first and then decreased with the increase of altitude. Yew, Southwest Spear, The contents of heavy metals under the quilt of Rhododendron and Davidia involucrata are CrPbCuAsCdHgg, PbCrCuAsCdHg.020 / 2040 and 4060cm in the vegetation of Abies of Fanjingshan, respectively. The effects of CD on the forestland soil were mainly influenced by CD, Pb and Hg of Crnopodium involucrata, EF1 of CrCuCU CDB / Hg and as under Rhododendron rhododendron, and EF1 of Cu CD CD PbHG and as et al under Abies of Fanjingshan Mountain, which were mainly influenced by CD, followed by Pb and Hg in the woodland of Fanjingshan Nature Reserve.
【作者单位】：贵州师范学院;贵州省生物研究所;
【基金】：贵州科学院院基金(黔科院J字地合[2013]008) 贵州省省院合作项目(黔科合院地合[2013]7002) 贵州省社发攻关项目(黔科合SY[2013]3152号) 贵州省科技厅社发攻关资助项目(黔科合SY字[2013]3157)
【分类号】：X53

【相似文献】