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vol.9 número2PRODUTIVIDADE E CUSTOS DO PROCESSADOR TRABALHANDO EM POVOAMENTOS DE Eucalyptus grandis Hill ex MaidenENRAIZAMENTO DE ESTACAS DE DIFERENTES DIÂMETROS EM Platanus acerifolia (Aiton) Willdenow índice de autoresíndice de assuntospesquisa de artigos
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Ciência Florestal

versão impressa ISSN 0103-9954versão On-line ISSN 1980-5098

Resumo

PEZZUTTI, Raul Vicente; SCHUMACHER, Mauro Valdir  e  HOPPE, Juarez Martins. GROWTH OF Eucalyptus globulus SEEDLINGS IN RESPONSE TO NPK FERTILIZATION. Ciênc. Florest. [online]. 1999, vol.9, n.2, pp.117-125. ISSN 1980-5098.  http://dx.doi.org/10.5902/19805098389.

The present study has had as its objectives to evaluate the seedlings of Eucalyptus globulus subspecies maidenii, in response to different NPK originated from the combination of slow release and quick release fertilizers. The study was conducted in a climatized green house at a the Technological Center of Forestry, in the Forest Department of the Federal University of Santa Maria-RS, from September to December of 1997. The plants were cultivated in a compost of pine bark substrate, in a completely randomized design, consisting of 4 treatments which consisted of Phosphorus dosages (60% of Super Simple (0-18-0)) and a slow release NPK fertilizer (14-14-14), known as Osmocote, which derived from ammonium nitrate, ammonium phosphate, calcium phosphate and potassium sulfate. The treatments, resulting from the combination of 60% super simple and 40% osmocote were 0,0; 2,5; 5,0 and 7,5 Kg m-3 of substrate. There were 4 repetitions of 11 plants for each treatment. After 100 days the height, collar diameter, above-ground dry matter, root dry matter and number of leaves were evaluated. The results indicate that the E. globulus subsp. maidenii seedlings growth responded positively to NPK fertilization [60% of Super Simple (0-180)+40% of slow release fertilizer (14-14-14)]; when the fertilizer was not applied the seedlings did not grow as much while the maximum increment in height, collar diameter, above-ground dry matter, root dry matter and number of leaves were obtained in the dosage range of 6,7 Kg m-3 to 7,5 Kg m-3 of substrate.

Palavras-chave : Eucalyptus maidenii; fertilization; seedlings; pine bark compost.

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