Simulating the effects of different potassium and water supply regimes on soil water content and water table depth over a rotation of a tropical Eucalyptus grandis plantation

Página do item simplificado
dc.contributor.authorChristina, M.
dc.contributor.authorle Maire, G.
dc.contributor.authorNouvellon, Y.
dc.contributor.authorVezy, R.
dc.contributor.authorBordon, B.
dc.contributor.authorBattie-Laclau, P.
dc.contributor.authorGoncalves, J. L. M.
dc.contributor.authorDelgado-Rojas, J. S.
dc.contributor.authorBouillet, J. -P.
dc.contributor.authorLaclau, J. -P.
dc.contributor.institutionCIRAD
dc.contributor.institutionUniv Montpellier
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionINRA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:51:43Z
dc.date.available2018-11-26T17:51:43Z
dc.date.issued2018-06-01
dc.description.abstractAlthough large amounts of potassium (K) are applied in tropical crops and planted forests, little is known about the interaction between K nutrition and water supply regimes on water resources in tropical regions. This interaction is a major issue because climate change is expected to increase the length of drought periods in many tropical regions and soil water availability in deep soil layers is likely to have a major influence on tree growth during dry periods in tropical planted forests. A process-based model (MAESPA) was parameterized in a throughfall exclusion experiment in Brazil to gain insight into the combined effects of K deficiency and rainfall reduction (37% throughfall exclusion) on the water used by the trees, soil water storage and water table fluctuations over the first 4.5 years after planting Eucalyptus grandis trees. A comparison of canopy transpiration in each plot with the values predicted for the same soil with the water content maintained at field capacity, made it possible to calculate a soil-driven tree water stress index for each treatment. Compared to K-fertilized trees with undisturbed rainfall (+K+W), canopy transpiration was 40% lower for K deficiency (-K+W), 20% lower for W deficit (+K - W) and 36% lower for combined K deficiency and W deficit (- K - W) on average. Water was withdrawn in deeper soil layers for -W than for + W, particularly over dry seasons. Under contrasted K availability, water withdrawal was more superficial for -K than for +K. Mean soil water content down to 18 m below surface (mbs) was 24% higher for - K+ W than for +K+W from 2 years after planting (after canopy closure), while it was 24% lower for +K-W and 12% lower for -K W than for +K+W. The soil-driven tree water stress index was 166% higher over the first 4.5 years after planting for - W than for +W, 76% lower for -K than for +K, and 14% lower for -K -W than for +K+W. Over the study period, deep seepage was higher by 371 mm yr(-1) (+122%) for -K than for +K and lower by 200 mm yr(-1) (- 66%) for -W than for +W. Deep seepage was lower by 44% for -K- W than for +K+ W. At the end of the study period, the model predicted a higher water table for -K (10 mbs for -K+W and 16 mbs for -K-W) than for +K (16 mbs for +K+W and 18 mbs for +K-W). Our study suggests that flexible fertilization regimes could contribute to adjusting the local trade-off between wood production and demand for soil water resources in planted forests.en
dc.description.affiliationCIRAD, UMR Eco&Sols, F-34398 Montpellier, France
dc.description.affiliationUniv Montpellier, Eco&Sols, CIRAD, INRA,IRD,Montpellier SupAgro, Montpellier, France
dc.description.affiliationCIRAD, UR AIDA 115, F-34398 Montpellier, France
dc.description.affiliationUniv Estadual Campinas, NIPE, BR-13083970 Campinas, SP, Brazil
dc.description.affiliationUniv Sao Paulo, Dept Ciencias Atmosfer, BR-05508900 Sao Paulo, SP, Brazil
dc.description.affiliationINRA, UMR 1391, ISPA, F-33140 Villenave Dornon, France
dc.description.affiliationUniv Sao Paulo, ESALQ, BR-13418900 Piracicaba, SP, Brazil
dc.description.affiliationUniv Sao Paulo, CENA, BR-13400970 Piracicaba, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Solos & Recursos Ambientais, BR-18610300 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Solos & Recursos Ambientais, BR-18610300 Botucatu, SP, Brazil
dc.description.sponsorshipUniversidade de Sao Paulo
dc.description.sponsorshipCentre de cooperation Internationale en Recherche Agronomique pour le Developpement (CIRAD)
dc.description.sponsorshipAgence Nationale de la Recherche (MACACC)
dc.description.sponsorshipAgropolis Foundation
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdAgence Nationale de la Recherche (MACACC): ANR-13-AGRO-0005
dc.description.sponsorshipIdAgropolis Foundation: ANR-10-LabX-0001-01
dc.description.sponsorshipIdCAPES: 017/2013
dc.format.extent4-14
dc.identifierhttp://dx.doi.org/10.1016/j.foreco.2017.12.048
dc.identifier.citationForest Ecology And Management. Amsterdam: Elsevier Science Bv, v. 418, p. 4-14, 2018.
dc.identifier.doi10.1016/j.foreco.2017.12.048
dc.identifier.fileWOS000432498500002.pdf
dc.identifier.issn0378-1127
dc.identifier.urihttp://hdl.handle.net/11449/164216
dc.identifier.wosWOS:000432498500002
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofForest Ecology And Management
dc.relation.ispartofsjr1,625
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectWater resources
dc.subjectGroundwater
dc.subjectBrazil
dc.subjectEucalyptus
dc.subjectDeep roots
dc.subjectNutrients
dc.titleSimulating the effects of different potassium and water supply regimes on soil water content and water table depth over a rotation of a tropical Eucalyptus grandis plantationen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

Arquivos

Pacote Original
Agora exibindo 1 - 1 de 1
Imagem de Miniatura
Nome:
WOS000432498500002.pdf
Tamanho:
4.68 MB
Formato:
Adobe Portable Document Format
Descrição:
Baixar

Coleções

Artigos - Solos e Recursos Ambientais - FCA