Substratos e temperaturas para testes de germina??o e vigor de sementes de Amburana cearensis (Allem?o) A.C. Smith

摘要

Amburana cearensis (Allem?o) B.C. Smith is a species native to the Northeast Region of Brazil. It has been increasingly exploited for fine woodworking, perfumery and medicine, therefore the need for studies that can assist in its preservation. The objective of this work was to determine substrate type and optimum temperature for A. cearensis seed germination and vigor tests. The experiment was carried out in complete randomized design with the treatments distributed in a 5 x 5 factorial scheme, using temperatures (constant of 20, 25, 30 and 35oC and alternate of 20-30oC) and substrates (Germitest paper, sand, vermiculite, bioplant and plantmax) with four replicates of 25 seeds each. The following parameters were analyzed: germination percentage, germination speed, length and dry mass of seedlings. The optimum temperature for A. cearensis seed germination and vigor tests was 35oC, independently of the used substrates. The substrates sand and vermiculite were the most suitable for evaluation of the physiological quality of seeds.