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Revista Árvore

Print version ISSN 0100-6762

Abstract

CRUZ, Cezar Augusto Fonseca e; CUNHA, Ana Catarina Monteiro Carvalho Mori da; PAIVA, Haroldo Nogueira de  and  NEVES, Júlio César Lima. Effect of macronutrients on the growth and quality of Peltophorum dubium seedlings grown in dystrophycous red yellow latosoil. Rev. Árvore [online]. 2011, vol.35, n.5, pp.983-995. ISSN 0100-6762.  http://dx.doi.org/10.1590/S0100-67622011000600004.

Peltophorum dubium is a fast growing tree species, rustic and excellent for using in mixed forestation in degraded areas. Due to lack of information on the nutrition of this species, the objective of this work was to evaluate the effect of doses of N, P, K, Ca, Mg and S on the growth, biomass production and quality indexs of H/D, H/MSPA, MSPA/MSR and IQD seedlings, and to determine the recommended doses of those elements. In this work, carried out in a greenhouse, a dustrophycous red yellow latosoil was used as substratum. The experiment was designed in a Baconian Matrix, evaluating three doses of the six macronutrients and two additional treatments, one with reference doses and the other one without the addition of nutrients. It was used a complete random experimental design with four replicates. It was noted through the orthogonal contrasts, a significant response of all the variables studied with the application of macronutrients. The nutrients with the best significant effects were P and Mg, and the recommended doses were 600 mg/dm3 of P, 0.2 cmolc/dm3 of Mg, and minimum doses of 50 mg/dm3 of K and 0.8 cmolc/dm3 of Ca. It was not verified response to application of N and S, for any of the characteristics evaluated, which indicates that the species have a low need of these nutrients.

Keywords : Plant nutrition; Morphologic characteristics; Peltophorum dubium.

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