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Ciência Rural

On-line version ISSN 1678-4596

Abstract

ALVES, Magnólia Martins; ALVES, Edna Ursulino; ARAUJO, Luciana Rodrigues de  and  LIMA, Maria de Lourdes dos Santos. Substrate in the emergence and initial growth of seedlings of Caesalpinia pulcherrima. Cienc. Rural [online]. 2017, vol.47, n.3, e20150433.  Epub Jan 12, 2017. ISSN 1678-4596.  https://doi.org/10.1590/0103-8478cr20150433.

Caesalpinia pulcherrima is an exotic species belongs to the Fabaceae family commonly known as flamboyant-mirim, and widely used for urban forestry. This study aimed to evaluate the effect of different substrates on the emergence and early seedlings growth of C. pulcherrima . The experiment was conducted in a greenhouse belonging to the Centro de Ciências Agrárias, Universidade Federal da Paraíba. The experimental design was completely randomized and treatments had 14 substrates: sand, vegetable soil, vermiculite, wood dust, carbonized rice straw, vegetable soil + sand 1:1, sand + wood dust 1:1, sand + carbonized rice straw 1:1, earth + wood dust 1:1, vegetable soil + carbonized rice straw 1:1, vermiculite + sand 1:1, vermiculite + wood dust 1:1, vermiculite + earth 1:1 and vermiculite + carbonized rice straw 1:1. Evaluation of the effect of the treatments was through the following determinations: percentage of emergency, first count, index of germination speed, length and dry weight of roots and shoots. The vermiculite, vegetable soil + sand 1:1, vermiculite + sand 1:1, vermiculite + saw dust 1:1, are suitable for emergence and early growth of seedlings of Caesalpinia pulcherrima . Substrates saw dust and carbonized rice straw were responsible for the worst performers on emergence and seedling development.

Keywords : Flamboyant mirim; ornamental species; seeds; vigor.

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