GERMINAÇÃO DE SEMENTES DE ALBÍZIA (ALBIZIA LEBBECK (L.) BENTH) EM FUNÇÃO DA LUZ E DO REGIME DE TEMPERATURA

Abstract

The albizia is a species arbores of the Leguminosae - Mimosoideae family (Momosaceas), native of Tropical Asia and characterized for presenting a speed growth, ability to fix nitrogen and to improve the structure of earth, especially in areas degraded, having uses multiples and facility to co associate with cultures agricultural. The research was lead in two experiments with the objective of to identify methods to superation of dormancy in seeds of albizia and to verify the effect of light and temperatures in germination of this species. In first the seeds were submitted the twelve methods to superation of dormancy: humid heat, immersion in hot water, immersion in sulfuric acid, and escarification mechanic, beyond of the witness, being determined the percentage of germination of seeds seard and deceased. In second experiment, after treatment with sulfuric acid for 10 minutes, the seeds were sowed in tabledoch paper type Germitest and put to germinate under nine combinations: continue light and constant temperature of 25oC; continue light and constant temperature of 35oC; continue light and alternated temperature (35oC/8h and 25oC/16h); dark continue and constant temperature of 25oC; dark continue and constant temperature of 35oC; dark continue and alternated temperature (35oC/8h and 25oC/16h); alternance of light (light/8h and dark/16h), 25oC; alternance of light (light/8h and dark/16h), 35oC and alternance of light and temperature (light/35oC/8h and dark/20oC/16h). Conclusion the specie Albizia lebbeck presents seeds dormancy, detach-itself the escarification mechanic and the sulfuric acid as efficient methods to the superation of dormancy; the seeds of albizia are insensitive to the light and your germination was not influenced by the temperatures useds.