CONTRIBUTION TO THE STUDY OF Triplaris surinamensis Cham. (BLACK TACHI Vi ?? RZEA): PHENOLOGY, BIOMETRICS AND SEED GERMINATION

Abstract

This work aims to study the phenological characteristics, biometrics seed Triplaris surinamensis Cham (black tachi floodplain), as well as the effect of the substrate on the germination of this Poligonaceae in order to generate data for the formation of production forests and protection . The studies were conducted at the Federal Rural University of Amazonia (UFRA), located in Bethlehem (1 ° 28'0 "S, 48 ° 27 '0") in the state of Para. The phenological observations were performed in 10 adult trees of black tachi of the existing floodplain UFRA Campus in Bethlehem. Biometrics seed was carried out under laboratory conditions and was based on the Rules for Seed Analysis (RAS). The germination experiment on different substrates was conducted in a greenhouse. The experimental design was completely randomized with four treatments (substrates) and six replications. Each replicate consisted of 54 seeds, which were germinated directly in plastic tubes at a depth of 0.5 cm. The treatments were: T1 (black earth 100%), T2 (black soil and chicken manure tanned, in the ratio 3: 1), T3 (black soil and ground charcoal, in the ratio 3: 1), T4 (black earth and organic compound thereof, in the ratio 3: 1). The number of germinated seeds evaluations were performed daily. The parameters analyzed were: germination percentage and germination rate index (1VG). The results showed that flowering and fruiting occur in the months from August to September, the less rainy period and may extend until October when then natural dispersion occurs. T surinamensis seeds are polygonal, small in size and are dispersed via anemocoric. The black earth substrates 100% black soil and compost 3: 1 and black soil and chicken manure tanned 3: 1, favorably influenced the germination of T. surinamensis is therefore the most recommended for seedling production. Because of its potential for recovery of degraded areas, especially riparian areas, there is need for research with T surinamensis in the areas of ecology and forestry.