Contents and availability of trace elements in soils of natural forests in karst region

YANG Lin; YANG Cheng; ZHU Tongbin; XIE Yincai; QIN Xinghua; LUO Liuling; ZHU Zihong; MENG Lei; HE Qiuxiang

doi:10.11932/karst2017y01

2018 No. 1

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YANG Lin, YANG Cheng, ZHU Tongbin, XIE Yincai, QIN Xinghua, LUO Liuling, ZHU Zihong, MENG Lei, HE Qiuxiang. Contents and availability of trace elements in soils of natural forests in karst region[J]. Carsologica Sinica, 2018, (1): 59-66. doi: 10.11932/karst2017y01

Citation:

YANG Lin, YANG Cheng, ZHU Tongbin, XIE Yincai, QIN Xinghua, LUO Liuling, ZHU Zihong, MENG Lei, HE Qiuxiang. Contents and availability of trace elements in soils of natural forests in karst region[J]. Carsologica Sinica, 2018, (1): 59-66. doi: 10.11932/karst2017y01

Contents and availability of trace elements in soils of natural forests in karst region

Publish Date: 25 February 2018

Abstract

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.
- karst area /
- natural forest /
- trace elements /
- availability