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Ciência Rural

versão impressa ISSN 0103-8478

Resumo

GOMES, Marcelo Barcelo et al. Morphogenesis in the germination and establishment phase of Brachiaria ruziziensis subjected to fertilization with nitrogen and potassium. Cienc. Rural [online]. 2012, vol.42, n.12, pp.2235-2241.  Epub 09-Out-2012. ISSN 0103-8478.  https://doi.org/10.1590/S0103-84782012005000108.

This study was conducted to assess the morphogenic responses of Brachiaria ruziziensis subjected to nitrogen and potassium fertilization in the germination and establishment phase. It was used a complete randomized experimental design in 4x4 factorial arrangement with three replicates. There were used 0, 100, 200 and 300kg N ha-1 and 0, 60, 90 and 120kg K ha-1. In the germination, it was verified the effect of the interaction N x K in SER. There was isolated effect of nitrogen doses on LAR, LER, phyllochron, LLN, LSR. Potassium exerted isolated effect on the LLS and LLN. In the established phase, it was observed that there was a significant interaction between N x K for LER and LFL. There was isolated effect of nitrogen on LAR, SER, phyllochron, LLN, LSR and LLS. Potassium exerted isolated effect on LLS, LLN and LSR. Nitrogen had greater effect on the morphogenesis than potassium on both, germination and established phase.

Palavras-chave : elongation; stem; phyllochron; interaction; senescence.

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