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vol.28 número2Caracterização química parcial das sementes de Lecythis pisonis camb. (Sapucaia)Eficiência da seleção combinada no melhoramento genético do Taxi-branco (Sclerolobium paniculatum Vogel) índice de autoresíndice de assuntospesquisa de artigos
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Acta Amazonica

versão impressa ISSN 0044-5967versão On-line ISSN 1809-4392

Resumo

DE CASTRO, Alberto William Viana; DE FARIAS NETO, João Tomé  e  CAVALCANTE, Emanuel da Silva. Effects of crop spacing on biomass productivity of Taxi-branco (Sclerolobium paniculatum Vogel). Acta Amaz. [online]. 1998, vol.28, n.2, pp.141-141. ISSN 0044-5967.  http://dx.doi.org/10.1590/1809-43921998282146.

A crop density trail was carried out at the Cerrado Experiment Station, Embrapa Amapá, Amapá, Brazil, to evaluate the effects of density on biomass yield of taxi-branco (Sclerolobium paniculatum Vogel). The trial tested seven spacings (2 x 1 m - 5000 trees/ha, 1.5 x 1.5 m - 4444 t/ha, 3 x 1 m - 3333 t/ha, 2 x 2 m - 2500 t/ha, 3 x 2 m - 1666 t/ha, 3 x 2.5 m - 1333 t/ha) in a randomized block design with four replications; growth and yield were measured in the seventh year. Height, diameter (DBH), survival and stem number showed no differences among treatments. There were two groups of treatments that differed in terms of biomass: the lowest yield was found at 3 x 2 m, while the highest yields were 1.355 t at 2 x 1 m, 1.351 t at 1.5 x 1.5 m, and 1.091 t at 3 x 1 m, so that there was good agreement between density and yield. Overall the best spacing for the Amapá cerrado conditions were 3 x 1 m, which uses fewer plants, has a lower cost, and yields similar to the higher density treatments.

Palavras-chave : height; diameter; biomass yield; density.

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