Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields

Cadmium (Cd) speciation ratio in arable land determines the Cd exposure risk and Cd uptake in crops. However, the driving mechanisms of Cd speciation change on the vertical scale of paddy fields remain poorly understood. In this study, the effects of plow layer and plow pan on Cd speciation distribu...

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Autores principales:	Xiaodong Hao, Lianyang Bai, Xueduan Liu, Ping Zhu, Hongwei Liu, Yunhua Xiao, Jibiao Geng, Qianjin Liu, Lihua Huang, Huidan Jiang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	Cd speciation response characteristic soil depth Cd-contaminated paddy microbial community Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/1f28a9f035494c5d8ec35bf399e2b46e
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spelling	oai:doaj.org-article:1f28a9f035494c5d8ec35bf399e2b46e2021-12-03T13:59:34ZCadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields1664-302X10.3389/fmicb.2021.774301https://doaj.org/article/1f28a9f035494c5d8ec35bf399e2b46e2021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmicb.2021.774301/fullhttps://doaj.org/toc/1664-302XCadmium (Cd) speciation ratio in arable land determines the Cd exposure risk and Cd uptake in crops. However, the driving mechanisms of Cd speciation change on the vertical scale of paddy fields remain poorly understood. In this study, the effects of plow layer and plow pan on Cd speciation distribution were investigated in a long-term Cd-contaminated rice ecosystem. The Cd accumulative effect within rice grain was enhanced with high levels of activated Cd speciation ratios in soils. Activated Cd speciation ratios were higher in plow layer soils, while stabilized Cd speciation ratios were elevated in plow pan soils. Soil physicochemical properties and soil microbes synergistically affected the Cd speciation changes in different ways between the two soil layers. Soil pH and organic elements in plow layer environment directly hindered the transformation of stabilized Cd speciation, while in plow pan environment, soil pH and organic elements indirectly decreased activated Cd speciation ratios and resulted in the accumulation of stabilized Cd speciation via regulating the predominant bacterial taxa. This study will improve our understanding of how soil environments regulate Cd speciation distributions in rice ecosystems and help to seek effective remediation methods of Cd-contaminated paddy fields to reduce the Cd accumulation in rice.Xiaodong HaoXiaodong HaoLianyang BaiXueduan LiuPing ZhuPing ZhuHongwei LiuYunhua XiaoJibiao GengQianjin LiuLihua HuangHuidan JiangFrontiers Media S.A.articleCd speciationresponse characteristicsoil depthCd-contaminated paddymicrobial communityMicrobiologyQR1-502ENFrontiers in Microbiology, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cd speciation response characteristic soil depth Cd-contaminated paddy microbial community Microbiology QR1-502
spellingShingle	Cd speciation response characteristic soil depth Cd-contaminated paddy microbial community Microbiology QR1-502 Xiaodong Hao Xiaodong Hao Lianyang Bai Xueduan Liu Ping Zhu Ping Zhu Hongwei Liu Yunhua Xiao Jibiao Geng Qianjin Liu Lihua Huang Huidan Jiang Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields
description	Cadmium (Cd) speciation ratio in arable land determines the Cd exposure risk and Cd uptake in crops. However, the driving mechanisms of Cd speciation change on the vertical scale of paddy fields remain poorly understood. In this study, the effects of plow layer and plow pan on Cd speciation distribution were investigated in a long-term Cd-contaminated rice ecosystem. The Cd accumulative effect within rice grain was enhanced with high levels of activated Cd speciation ratios in soils. Activated Cd speciation ratios were higher in plow layer soils, while stabilized Cd speciation ratios were elevated in plow pan soils. Soil physicochemical properties and soil microbes synergistically affected the Cd speciation changes in different ways between the two soil layers. Soil pH and organic elements in plow layer environment directly hindered the transformation of stabilized Cd speciation, while in plow pan environment, soil pH and organic elements indirectly decreased activated Cd speciation ratios and resulted in the accumulation of stabilized Cd speciation via regulating the predominant bacterial taxa. This study will improve our understanding of how soil environments regulate Cd speciation distributions in rice ecosystems and help to seek effective remediation methods of Cd-contaminated paddy fields to reduce the Cd accumulation in rice.
format	article
author	Xiaodong Hao Xiaodong Hao Lianyang Bai Xueduan Liu Ping Zhu Ping Zhu Hongwei Liu Yunhua Xiao Jibiao Geng Qianjin Liu Lihua Huang Huidan Jiang
author_facet	Xiaodong Hao Xiaodong Hao Lianyang Bai Xueduan Liu Ping Zhu Ping Zhu Hongwei Liu Yunhua Xiao Jibiao Geng Qianjin Liu Lihua Huang Huidan Jiang
author_sort	Xiaodong Hao
title	Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields
title_short	Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields
title_full	Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields
title_fullStr	Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields
title_full_unstemmed	Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields
title_sort	cadmium speciation distribution responses to soil properties and soil microbes of plow layer and plow pan soils in cadmium-contaminated paddy fields
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/1f28a9f035494c5d8ec35bf399e2b46e
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Cadmium Speciation Distribution Responses to Soil Properties and Soil Microbes of Plow Layer and Plow Pan Soils in Cadmium-Contaminated Paddy Fields

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