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Suprimento de potássio, sódio e silício às mudas de eucalipto

Grant number: 14/16397-0
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2014
Effective date (End): November 30, 2015
Field of knowledge:Agronomical Sciences - Forestry Resources and Forestry Engineering - Forestry
Principal Investigator:Eric Victor de Oliveira Ferreira
Grantee:Nikolas de Souza Mateus
Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil


Eucalyptus is the most planted genre in Brazil, finding, in general, in infertile soil. Thus, the use of fertilization has become essential, shown after its production cultivation in several successive cycles. Potassium (K) is the most required macronutrient for eucalyptus, acting in the activation of several enzymes, osmotic control, stomatal opening, photosynthesis and resistance to frost and diseases. Thus, the K influences directly the water use efficiency (WUE) in plants, bringing great benefits, especially in areas of water deficit. Sodium (Na) may partially replace some physiological functions of the K, being very interest their fertilization since its cost is relatively lower. Silicon (Si) can be deposited the cuticle and provides more erect leaves, favoring photosynthesis and decreasing plant transpiration and thus influence also in the WUE. Therefore, this study objectively assess, in three experiments in the greenhouse of the Department of Forest Sciences (ESALQ / USP), the supply of K, Na and Si in nutrient solution to seedlings of eucalyptus. Will be evaluated nutrition, gas exchange, stomatal density, leaf water potential, the angle of leaf inclination, leaf area, the WUE and the growth of plants in different seasons. It is expected that plants respond positively to the K supply and that both Na as Si provide benefits to the initial growth of eucalyptus influencing positively the physiological processes of the plants.

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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)
MATEUS, NIKOLAS DE SOUZA; DE OLIVEIRA FERREIRA, ERIC VICTOR; ARTHUR JUNIOR, JOSE CARLOS; DOMEC, JEAN-CHRISTOPHE; JORDAN-MEILLE, LIONEL; DE MORAES GONCALVES, JOSE LEONARDO; LAVRES, JOSE. The ideal percentage of K substitution by Na in Eucalyptus seedlings: Evidences from leaf carbon isotopic composition, leaf gas exchanges and plant growth. Plant Physiology and Biochemistry, v. 137, p. 102-112, . (14/16397-0)
MATEUS, NIKOLAS DE SOUZA; OLIVEIRA FERREIRA, ERIC VICTOR; FLORENTINO, ANTONIO LEITE; FERRAZ, ALEXANDRE VICENTE; DOMEC, JEAN-CHRISTOPHE; JORDAN-MEILLE, LIONEL; BENDASSOLLI, JOSE ALBERTINO; MORAES GONCALVES, JOSE LEONARDO; LAVRES, JOSE. otassium supply modulates Eucalyptus leaf water-status under PEG-induced osmotic stress: integrating leaf gas exchange, carbon and nitrogen isotopic composition and plant growt. TREE PHYSIOLOGY, v. 42, n. 1, p. 59-70, . (14/16397-0)

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