中国岩溶2018，Vol.37Issue(1)：59-66,8.DOI:10.11932/karst2017y01
岩溶区原始林土壤微量元素含量与有效特征
Contents and availability of trace elements in soils of natural forests in karst region
摘要
Abstract
Soil under undisturbed natural forests were sampled to investigate total and available contents of four trace elements (Cu,Fe,Mn and Zn) from four nature reserves including Maolan in Guizhou,Mengyuan and Green Stone Forest in Yunnan,and Exianling in Hainan,all of which were characterized by typical karst landform.The results showed total content of Cu,Fe,Mn and Zn reached to 0.03～0.08g · kg-1,35.6～ 57.4 g · kg-1,0.74～5.83 g · kg-1 and 0.13～1.03g · kg-1,respectively,which were significantly higher the average national background values.The available content of Cu,Fe,Mn and Zn in study areas were 1.09～3.51 mg · kg-1,11.6～62.9 mg · kg-1,48.3～173 mg · kg-1 and 4.17～37.6 mg · kg-1,respectively.According to the evaluation standard for trace elements in soil,available contents of all four elements were at relatively high level.The average activation ratios of Cu,Fe,Mn and Zn in soils under the natural forest were 5.48％,0.10％,6.44％ and 4.19％,respectively,indicating high supply level for Cu,Mn and Zn but low supply level for Fe.Total availability index of trace element (Et) in soil was ranked as Maolan (21.0) ＞Green Stone Forest (12.8) ≈Mengyuan (12.7) ＞Exianling (5.15).In addition,Et was significantly positively correlated with total N and organic carbon contents.关键词
岩溶区/原始林/微量元素/有效性Key words
karst area/natural forest/trace elements/availability分类
农业科技引用本文复制引用
杨霖,杨程,朱同彬,谢银财,秦兴华,罗柳玲,朱梓弘,孟磊,何秋香..岩溶区原始林土壤微量元素含量与有效特征[J].中国岩溶,2018,37(1):59-66,8.基金项目
国家重点研发计划项目(2016YFC0502503) （2016YFC0502503）
中国地质科学院基本科研业务费专项经费资助(YYWF201637,201724) （YYWF201637,201724）
