Tree-Substrate Water Relations and Root Development in Tree Plantations Used for Mine Tailings Reclamation.
Identifieur interne : 001614 ( Main/Exploration ); précédent : 001613; suivant : 001615Tree-Substrate Water Relations and Root Development in Tree Plantations Used for Mine Tailings Reclamation.
Auteurs : Marie Guittonny-Larchevêque ; Bruno Bussière ; Carl PednaultSource :
- Journal of environmental quality [ 0047-2425 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Arbres, Racines de plante.
- Dépollution biologique de l'environnement, Eau, Mine, Polluants du sol, Sol.
English descriptors
- KwdEn :
- MESH :
- chemical : Soil, Soil Pollutants, Water.
- growth & development : Plant Roots, Trees.
- Biodegradation, Environmental, Mining.
Abstract
Tree water uptake relies on well-developed root systems. However, mine wastes can restrict root growth, in particular metalliferous mill tailings, which consist of the finely crushed ore that remains after valuable metals are removed. Thus, water stress could limit plantation success in reclaimed mine lands. This study evaluates the effect of substrates varying in quality (topsoil, overburden, compost and tailings mixture, and tailings alone) and quantity (50- or 20-cm-thick topsoil layer vs. 1-m plantation holes) on root development and water stress exposure of trees planted in low-sulfide mine tailings under boreal conditions. A field experiment was conducted over 2 yr with two tree species: basket willow ( L.) and hybrid poplar ( Moench × A. Henry). Trees developed roots in the tailings underlying the soil treatments despite tailings' low macroporosity. However, almost no root development occurred in tailings underlying a compost and tailings mixture. Because root development and associated water uptake was not limited to the soil, soil volume influenced neither short-term (water potential and instantaneous transpiration) nor long-term (δC) water stress exposure in trees. However, trees were larger and had greater total leaf area when grown in thicker topsoil. Despite a volumetric water content that always remained above permanent wilting point in the tailings colonized by tree roots, measured foliar water potentials at midday were lower than drought thresholds reported for both tested tree species.
DOI: 10.2134/jeq2015.09.0477
PubMed: 27136172
Affiliations:
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Le document en format XML
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However, mine wastes can restrict root growth, in particular metalliferous mill tailings, which consist of the finely crushed ore that remains after valuable metals are removed. Thus, water stress could limit plantation success in reclaimed mine lands. This study evaluates the effect of substrates varying in quality (topsoil, overburden, compost and tailings mixture, and tailings alone) and quantity (50- or 20-cm-thick topsoil layer vs. 1-m plantation holes) on root development and water stress exposure of trees planted in low-sulfide mine tailings under boreal conditions. A field experiment was conducted over 2 yr with two tree species: basket willow ( L.) and hybrid poplar ( Moench × A. Henry). Trees developed roots in the tailings underlying the soil treatments despite tailings' low macroporosity. However, almost no root development occurred in tailings underlying a compost and tailings mixture. Because root development and associated water uptake was not limited to the soil, soil volume influenced neither short-term (water potential and instantaneous transpiration) nor long-term (δC) water stress exposure in trees. However, trees were larger and had greater total leaf area when grown in thicker topsoil. Despite a volumetric water content that always remained above permanent wilting point in the tailings colonized by tree roots, measured foliar water potentials at midday were lower than drought thresholds reported for both tested tree species. </div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">27136172</PMID><DateCompleted><Year>2018</Year><Month>08</Month><Day>20</Day></DateCompleted><DateRevised><Year>2018</Year><Month>12</Month><Day>02</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0047-2425</ISSN><JournalIssue CitedMedium="Print"><Volume>45</Volume><Issue>3</Issue><PubDate><Year>2016</Year><Month>May</Month></PubDate></JournalIssue><Title>Journal of environmental quality</Title><ISOAbbreviation>J Environ Qual</ISOAbbreviation></Journal><ArticleTitle>Tree-Substrate Water Relations and Root Development in Tree Plantations Used for Mine Tailings Reclamation.</ArticleTitle><Pagination><MedlinePgn>1036-45</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.2134/jeq2015.09.0477</ELocationID><Abstract><AbstractText>Tree water uptake relies on well-developed root systems. However, mine wastes can restrict root growth, in particular metalliferous mill tailings, which consist of the finely crushed ore that remains after valuable metals are removed. Thus, water stress could limit plantation success in reclaimed mine lands. This study evaluates the effect of substrates varying in quality (topsoil, overburden, compost and tailings mixture, and tailings alone) and quantity (50- or 20-cm-thick topsoil layer vs. 1-m plantation holes) on root development and water stress exposure of trees planted in low-sulfide mine tailings under boreal conditions. A field experiment was conducted over 2 yr with two tree species: basket willow ( L.) and hybrid poplar ( Moench × A. Henry). Trees developed roots in the tailings underlying the soil treatments despite tailings' low macroporosity. However, almost no root development occurred in tailings underlying a compost and tailings mixture. Because root development and associated water uptake was not limited to the soil, soil volume influenced neither short-term (water potential and instantaneous transpiration) nor long-term (δC) water stress exposure in trees. However, trees were larger and had greater total leaf area when grown in thicker topsoil. Despite a volumetric water content that always remained above permanent wilting point in the tailings colonized by tree roots, measured foliar water potentials at midday were lower than drought thresholds reported for both tested tree species. </AbstractText><CopyrightInformation>Copyright © by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Inc.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Guittonny-Larchevêque</LastName><ForeName>Marie</ForeName><Initials>M</Initials></Author><Author ValidYN="Y"><LastName>Bussière</LastName><ForeName>Bruno</ForeName><Initials>B</Initials></Author><Author ValidYN="Y"><LastName>Pednault</LastName><ForeName>Carl</ForeName><Initials>C</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>J Environ Qual</MedlineTA><NlmUniqueID>0330666</NlmUniqueID><ISSNLinking>0047-2425</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012989">Soil Pollutants</NameOfSubstance></Chemical><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D001673" MajorTopicYN="N">Biodegradation, Environmental</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008906" MajorTopicYN="N">Mining</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012989" MajorTopicYN="Y">Soil Pollutants</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="Y">Water</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2016</Year><Month>5</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2016</Year><Month>5</Month><Day>3</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2018</Year><Month>8</Month><Day>21</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">27136172</ArticleId><ArticleId IdType="doi">10.2134/jeq2015.09.0477</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list></list><tree><noCountry><name sortKey="Bussiere, Bruno" sort="Bussiere, Bruno" uniqKey="Bussiere B" first="Bruno" last="Bussière">Bruno Bussière</name><name sortKey="Guittonny Larcheveque, Marie" sort="Guittonny Larcheveque, Marie" uniqKey="Guittonny Larcheveque M" first="Marie" last="Guittonny-Larchevêque">Marie Guittonny-Larchevêque</name><name sortKey="Pednault, Carl" sort="Pednault, Carl" uniqKey="Pednault C" first="Carl" last="Pednault">Carl Pednault</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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