Fenologia de Dalbergia cearensis Ducke (Fabaceae) em um fragmento de floresta estacional, no semiárido do Nordeste, Brasil

摘要

In general, tree species that occur in the Caatinga vegetation in the Brazilian semiarid of the northeastern region, have their phenophases (flowering, fruiting and foliage change) conditioned by the duration and intensity of seasonal drought. This study records the phenology of leaf-fall, leaf incision, flowering and fruit production of 32 Dalbergia cearensis Ducke individuals. Samples were collected every 15 days from 2009 to 2011 at the Unidade de Conserva??o de Uso Sustentável Fazenda N?o me Deixes, a conservation area in the Brazilian semiarid. The frequency of occurrence of the phenophases was related to the elements of climate (average monthly rainfall, monthly average temperature, monthly average insolation and soil water availability). The vegetative phenology, leaf fall and sprouting of new leaves, followed the seasonality of rainfall during the dry and rainy seasons. The flowering and fruiting occurred at the beginning of the rains, and the diaspores of D. cearensis were scattered throughout the year after they broke off slowly from the compact axillary panicles.