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On-line version ISSN 1806-9088
BRAGA JUNIOR, Joel Martins; BRUNO, Riselane de Lucena Alcântara and ALVES, Edna Ursulino. Emergence of Zizyphus joazeiro Mart. (Rhamnaceae) seedlings dependant on substrates. Rev. Árvore [online]. 2010, vol.34, n.4, pp.609-616. ISSN 1806-9088. http://dx.doi.org/10.1590/S0100-67622010000400005.
The juazeiro is a very important plant for the northeast half-barren semi-arid region, always remaining green, and being food source for the animals at during droughts. Due to the fact that the species mainly propagates by dispersion units (endocarps + seeds), the present study had as its purpose the evaluation of different types of substrates for the emergence of juazeiro seedlings. The experiment was carried out in a greenhouse at the Centro de Ciências Agrárias of the Universidade Federal da Paraíba, in Areia-PB, Brazil. The substrates used were: Plugmix®, vermiculite, vegetal soil, vegetal soil + cattle manure (in ratios of 3:1, 1:1 and 1:3), vegetal soil + sand (in ratios of 3:1, 1:1 and 1:3), sand, sand + wood dust (in ratios of 3:1, 1:1 and 1:3), wood dust, sand + shaved wood (in the ratios of 3:1, 1:1 e 1:3), scraped wood, and sand + cattle manure (in the ratios of 3:1, 1:1 and 1:3). Through daily evaluations, the following characteristics had been determined: emergence, index of the speed of emergence, and the length and dry mass of the seedling. For the emergence of seedlings, the most efficient substrate was vegetal soil, and in terms of vigor, the greatest values were obtained in the Plugmix®, vegetal land + cattle manure in the ratios of 3:1 and 1:1 and sand substrates.
Keywords : Juazeiro; Vigor; Forest species.