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Temporal changes of metal bioavailability and extracellular enzyme activities in relation to afforestation of highly contaminated calcareous soil

文献类型：期刊论文

作者Hu, Yahu1,2; Huang, Yu1,2; Su, Jieqiong3; Gao, Zhuo1,2; Li, Shuqi1,2; Nan, Zhongren1,2
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2018-05-01
卷号622页码:1056-1066
ISSN号0048-9697
关键词Phytoremediation Poplar Extracellular enzyme activity Ecological stoichiometry
DOI10.1016/j.scitotenv.2017.12.027
通讯作者Hu, Yahu(huyh@lzu.edu.cn)
英文摘要Metal bioavailability and extracellular enzyme activity are two important indicators of soil quality in metalcontaminated soil. However, it is unclear how the chronosequence effect modifies these two factors in highly contaminated calcareous soils undergoing afforestation. We used Populus simonii Carr. and the calciphilous Ulmus macrocarpa Hance as contrasting tree species to study the chronosequence effect. We found that afforestation significantly increased soil total nitrogen (N) content aswell as soil carbon (C)/phosphorus (P) and N/P ratios, but decreased soil total P content and soil C/N ratio, regardless of the tree species and stand age, suggesting strong P limitation. However, available P did not change significantly with stand age. In both tree species, P mobilization depleted soil organic matter through the priming effect of dissolved organic carbon, whereas the decrease in soil pH in the U. macrocarpa stands enhanced CaCO3 dissolution, collectively reducing the capacity of the soil to immobilize metals, resulting in increased metal bioavailability with stand age. The activity of oxidase (dehydrogenase) was positively correlated with bioavailable zinc concentration, soil electrical conductivity, and soil totalNcontent. Hydrolase activities (alkaline phosphatase, beta-glucosidase, and urease) were significantly positively correlated with the ratios of soil C/N and C/P, soil pH, and CaCO3, but negatively correlated with soil N/P ratio and bioavailable cadmium concentration. Increasing stand age was associated with the gradual recovery of oxidase activity and remarkable inhibition of hydrolase activity. Our results suggest that the combination of soil hydrolase activity andmetal bioavailability can predict soil quality in the afforestation of highly contaminated soils. (c) 2017 Elsevier B. V. All rights reserved.
收录类别SCI
WOS关键词DISSOLVED ORGANIC-MATTER ; SHORT-ROTATION COPPICE ; AGRICULTURAL SOILS ; CARBON SEQUESTRATION ; DREDGED SEDIMENT ; NORTHERN CHINA ; WOODY-PLANTS ; PHYTOREMEDIATION ; POPLAR ; PHYTOMANAGEMENT
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000426349000106
URI标识http://www.irgrid.ac.cn/handle/1471x/2558101
专题寒区旱区环境与工程研究所
通讯作者Hu, Yahu
作者单位1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China
2.Lanzhou Univ, Coll Earth & Environm Sci, Gansu Key Lab Environm Pollut Predict & Control, Lanzhou 730000, Gansu, Peoples R China
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Yahu,Huang, Yu,Su, Jieqiong,et al. Temporal changes of metal bioavailability and extracellular enzyme activities in relation to afforestation of highly contaminated calcareous soil[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,622:1056-1066.
APA Hu, Yahu,Huang, Yu,Su, Jieqiong,Gao, Zhuo,Li, Shuqi,&Nan, Zhongren.(2018).Temporal changes of metal bioavailability and extracellular enzyme activities in relation to afforestation of highly contaminated calcareous soil.SCIENCE OF THE TOTAL ENVIRONMENT,622,1056-1066.
MLA Hu, Yahu,et al."Temporal changes of metal bioavailability and extracellular enzyme activities in relation to afforestation of highly contaminated calcareous soil".SCIENCE OF THE TOTAL ENVIRONMENT 622(2018):1056-1066.

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