Studies on Soil Enzyme Activity in Rhizosphere of Hyperaccumulator Sedum alfredii Hance

LI Ting-qiang; ZHU En; YANG Xiao-e; ZHANG Ling

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Studies on Soil Enzyme Activity in Rhizosphere of Hyperaccumulator Sedum alfredii Hance

更新时间：2024-11-07

- Studies on Soil Enzyme Activity in Rhizosphere of Hyperaccumulator Sedum alfredii Hance
- Vol. 21, Issue 3, Pages: 112-117(2007)
- 作者机构：
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  CLC： X53S154.2
- Published：2007
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LI Ting-qiang, ZHU En, YANG Xiao-e, et al. Studies on Soil Enzyme Activity in Rhizosphere of Hyperaccumulator Sedum alfredii Hance[J]. 2007, 21(3): 112-117.
DOI：

LI Ting-qiang, ZHU En, YANG Xiao-e, et al. Studies on Soil Enzyme Activity in Rhizosphere of Hyperaccumulator Sedum alfredii Hance[J]. 2007, 21(3): 112-117. DOI：

摘要

通过野外调查和盆栽试验研究了超积累植物东南景天根际土壤酶活性变化及其与重金属有效态的关系。研究结果表明

在矿山土壤、重度污染土壤和轻度污染土壤上

种植超积累生态型东南景天后

根际土壤有效态Zn分别比非根际减少了14.3%

7.9%和47.4%

有效态Cd分别比非根际减少25.1%

21.9%和20%。在铅锌矿区

东南景天生长地段土壤蔗糖酶、酸性磷酸酶、脱氢酶活性高于其它植物生长地段。在矿山土壤和重度污染土壤中

超积累生态型东南景天根际土壤酶活性明显高于非根际土壤

同时也高于非超积累生态型根际土壤。Pb、Zn、Cd、Cu4种重金属对东南景天根际土壤脲酶、蔗糖酶、脱氢酶活性均有抑制作用

而Pb对磷酸酶有一定的刺激作用。东南景天根际土壤脱氢酶、酸性磷酸酶活性与重金属有效态含量呈极显著相关。

Abstract

Soil enzymatic activities and its relationship with available heavy metal content in rhizosphere of hyperaccumulator Sedum alfredii Hance were studied based on field investigation and pot experiment.The results showed that DTPA extractable-Zn content in rhizosphere soil of Sedum alfredii Hance decreased by 14.3%

7.9% and 47.4%

and DTPA extractable-Cd content decreased by 25.1%

21.9% and 20% as compared with non-rhizosphere soil

when planted in mining

heavy polluted soil and light polluted soil

respectively.In Pb/Zn mining area where hyperaccumulating ecotype Sedum alfredii grow

sucrase

acid phosphatase and dehydrogenase activity in soil were much higher than other place.Soil enzymatic activities(urease

acid phosphatase and dehydrogenase) in rhizosphere of hyperaccumulating ecotype Sedum alfredii were much higher than both in non-rhizosphere and rhizosphere of non-hyperaccumulating ecotype

especially in mining and heavy polluted soil.Urease

sucrase and dehydrogenase activities in rhizosphere of hyperaccumulating ecotype Sedum alfredii were restrained by Pb

Cd and Cu significantly

whereas acid phosphatase activitie was prompted by Pb.Acid phosphatase and dehydrogenase activity was significantly correlated with combined available content of soil heavy metals in rhizosphere of hyperaccumulator Sedum alfredii Hance.

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