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Influence of potassium fertilization ánd hydraulic redistribution by deep roots ón “The availability of water ánd nutrients from eucalyptus

Grant number: 13/25998-4
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): May 01, 2014
Effective date (End): August 31, 2017
Field of knowledge:Agronomical Sciences - Forestry Resources and Forestry Engineering - Forest Management
Principal Investigator:Cassio Hamilton Abreu Junior
Grantee:Verónica Asensio Fandiño
Home Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil


In order to attend the increasing demand for wood products, areas of fast-growing plantations are expanding in Brazil. Brazilian eucalypt plantations can be used as a model of fast-growth for other regions in the world. With the aim to improve the sustainability of these plantations, it is necessary to gain insight into their behavior and impact on the availability of soil water and nutrients. Brazilian plantations show very fast growth despite the low fertility of soils. It is expected that hydraulic redistribution (HR) by deep roots in these ecosystems can increase the uptake of water and nutrients by trees and help keeping superficial roots alive during dry periods. The main objective of this project is to assess the role of very deep roots in eucalypt plantations on water fluxes in both trees and soils. It will be also investigated whether the use of potassium fertilizer can reduce water stress, since this element is involved in the regulation of the physiological processes of water losses in plants. The present project is an extension of Franco-Brazilian cooperation with Spain, being of high relevance in the exchange of information about the methods used by the research groups of USP, UNESP and Embrapa in Brazil, the Université de Bordeaux, UMR TCEM INRA and the CIRAD in France, as well as the department of Biologia Vegetal e Ciência do Solo from the Universidade de Vigo in Spain. This cooperation will consist in the implementation of field experiments with tree species, data acquisition, development of ecophysiological models, publication of international papers and training of highly qualified human resources.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ASENSIO, VERONICA; DOMEC, JEAN-CHRISTOPHE; NOUVELLON, YANN; LACLAU, JEAN-PAUL; BOUILLET, JEAN-PIERRE; JORDAN-MEILLE, LIONEL; LAVRES, JOSE; ROJAS, JUAN DELGADO; GUILLEMOT, JOANNES; ABREU-JUNIOR, CASSIO H. Potassium fertilization increases hydraulic redistribution and water use efficiency for stemwood production in Eucalyptus grandis plantations. ENVIRONMENTAL AND EXPERIMENTAL BOTANY, v. 176, AUG 2020. Web of Science Citations: 0.
PRADIER, CELINE; HINSINGER, PHILIPPE; LACLAU, JEAN-PAUL; BOUILLET, JEAN-PIERRE; GUERRINI, IRAE AMARAL; MORAES GONCALVES, JOSE LEONARDO; ASENSIO, VERONICA; ABREU-JUNIOR, CASSIO H.; JOURDAN, CHRISTOPHE. Rainfall reduction impacts rhizosphere biogeochemistry in eucalypts grown in a deep Ferralsol in Brazil. PLANT AND SOIL, v. 414, n. 1-2, p. 339-354, MAY 2017. Web of Science Citations: 5.

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