GROWTH AND MINERAL NUTRITION IN SEEDLINGS OF AUSTRALIAN CEDAR (Toona ciliata) SUBJECTED TO NUTRIENT DEPRIVATION

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Bruno da Silva Moretti Antonio Eduardo Furtini Neto Sheila Isabel do Carmo Pinto Isabela Volpi Furtini Ciro Augusto de Souza Magalhães

Abstract

In order to evaluate nutritional requirements and the effect of nutrient deprivation on the development of seedlings of Australian cedar (Toona ciliata M. Roem var. australis), a greenhouse experiment was conducted. The substrate used was a dystroferric red latosol with low nutrient availability, using 15 treatments and applying the missing element technique. The experiment included two complete treatments (one provided N, P, K, S, B, Cu, Zn with limestone while another provided N, P, K, Ca, Mg, S, B, Cu and Zn without limestone), besides deprivation of each nutrient (-N, -P, -K, -Ca, -Mg, -S, -B, -Cu and -Zn), one treatment with combined deprivation of B, Cu and Zn, one treatment applying limestone only, one treatment applying N, P, K, S, B, Cu and Zn, without limestone, and one absolute control treatment (natural soil). The following characteristics were evaluated: height, diameter, shoot dry matter and root dry matter, and nutrient content in the shoot dry matter after 150 days. Australian cedar plants have high nutritional requirements, and nutrients P, N, S, Ca, K, Mg and Cu, in that order, were found to be limiting factors to plant development. B and Zn deprivation did not affect plant development. Limestone application was essential for the development of Australian cedar plants. Initial deficiency symptoms were found to be the result of S, limestone and N deprivation.

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How to Cite
MORETTI, Bruno da Silva et al. GROWTH AND MINERAL NUTRITION IN SEEDLINGS OF AUSTRALIAN CEDAR (Toona ciliata) SUBJECTED TO NUTRIENT DEPRIVATION. CERNE, [S.l.], v. 17, n. 4, p. 453-464, may 2015. ISSN 2317-6342. Available at: <http://cerne.ufla.br/site/index.php/CERNE/article/view/68>. Date accessed: 23 sep. 2019.
Keywords
Missing element, soil fertility, nutritional deficiency
Section
Article