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Respective roles of Fe-oxyhydroxide dissolution, pH changes and sediment inputs in dissolved phosphorus release from wetland soils under anoxic conditions
Gu, Sen1; Gruau, Gerard1; Dupas, Remi2; Petitjean, Patrice1; Li, Qingman3; Pinay, Gilles4
2019-03-15
Source PublicationGEODERMA
ISSN0016-7061
Volume338Issue:1Pages:365-374
AbstractThe development of anoxic conditions in riparian wetland (RW) soils is widely known to release dissolved phosphorus (DP), but the respective roles of reductive dissolution of Fe-oxyhydroxide, pH changes and sediment inputs in this release remain debated. This study aimed to identify and quantify these respective roles via laboratory anaerobic/aerobic incubation of RW soils with and without the addition of sediment. The investigated soils came from two RWs with contrasting P status and organic matter (OM) content in their soils, while the added sediment carne from an adjacent cultivated field. Results showed that the amount and speciation of the DP released during anaerobic/aerobic incubations were controlled by soil P status and soil OM content. During anaerobic incubation, DP release in the soil with high extractable P and low OM contents was controlled by reductive dissolution of Fe-oxyhydroxides (83%), whereas that released in the soil with low extractable P and high OM contents was controlled by an increase in pH (88%). Anaerobic incubation of a mixture of eroded sediments and RW soils increased the release of DP, dissolved organic carbon and Fe(11) (by 16%, 4% and 18%, respectively) compared to the simple addition of the amounts released during their separate incubations. Management practices should decrease soil erosion from upland fields to avoid deposition of P-rich sediments on RW soils. Management efforts should focus preferentially on RWs whose Fe:P molar ratios in the soil solution during reduction are the lowest, since they indicate a high risk that the DP released will be transferred to watercourses.
SubtypeArticle
KeywordAnaerobic Incubation Dissolved Phosphorus Fe-oxyhydroxides Ph Changes Riparian Wetland
DOI10.1016/j.geoderma.2018.12.034
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Indexed BySCI
Funding OrganizationAgence de l'Eau Loire-Bretagne(14038840) ; INSU-CNRS program EC2CO(AO2015-882574) ; National Natural Science Foundation of China(41373099) ; Agence de l'Eau Loire-Bretagne(14038840) ; INSU-CNRS program EC2CO(AO2015-882574) ; National Natural Science Foundation of China(41373099)
Language英语
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS KeywordTRACE-METAL RELEASE ; ORGANIC-MATTER ; MICROBIAL REDUCTION ; OXIDATION-KINETICS ; BUFFER STRIPS ; IRON ; AVAILABILITY ; GROUNDWATER ; DYNAMICS ; WATERS
WOS IDWOS:000457657000036
Funding OrganizationAgence de l'Eau Loire-Bretagne(14038840) ; INSU-CNRS program EC2CO(AO2015-882574) ; National Natural Science Foundation of China(41373099) ; Agence de l'Eau Loire-Bretagne(14038840) ; INSU-CNRS program EC2CO(AO2015-882574) ; National Natural Science Foundation of China(41373099)
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/72391
Collection水环境工程研究中心
Affiliation1.Univ Rennes, CNRS, OSUR, Geosci Rennes UMR 6118, F-35000 Rennes, France
2.Agrocampus Ouest, INRA, SAS, UMR 1069, F-35000 Rennes, France
3.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
4.Irstea Lyon, RiverLy, 5 Rue Doua, F-69625 Villeurbanne, France
Recommended Citation
GB/T 7714
Gu, Sen,Gruau, Gerard,Dupas, Remi,et al. Respective roles of Fe-oxyhydroxide dissolution, pH changes and sediment inputs in dissolved phosphorus release from wetland soils under anoxic conditions[J]. GEODERMA,2019,338(1):365-374.
APA Gu, Sen,Gruau, Gerard,Dupas, Remi,Petitjean, Patrice,Li, Qingman,&Pinay, Gilles.(2019).Respective roles of Fe-oxyhydroxide dissolution, pH changes and sediment inputs in dissolved phosphorus release from wetland soils under anoxic conditions.GEODERMA,338(1),365-374.
MLA Gu, Sen,et al."Respective roles of Fe-oxyhydroxide dissolution, pH changes and sediment inputs in dissolved phosphorus release from wetland soils under anoxic conditions".GEODERMA 338.1(2019):365-374.
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