Artigo
Vermiculita como substrato para o teste de germinação de sementes de ipê-amarelo
Fecha
2012-01-01Registro en:
Semina-ciencias Agrarias. Londrina: Universidade Estadual de Londrina (UEL), v. 33, n. 2, p. 533-540, 2012.
1676-546X
10.5433/1679-0359.2012v33n2p533
WOS:000307002600010
WOS000307002600010.pdf
9669833663325445
0000-0002-1720-9252
Autor
Universidade Estadual Paulista (Unesp)
Universidade Estadual de Goiás (UEG)
Universidade Federal de Uberlândia (UFU)
Universidade Estadual de Londrina (UEL)
Resumen
Vermiculite is a substrate used in seedling production of forest species and can be an option for the germination test of ipe seeds. The objective of this research was to evaluate the use of vermiculite in the germination test of Tabebuia chrysotricha seeds and to stablish appropriate particle size and moisture for this substrate. Four replications of 20 seeds were sown in soil, sand, paper rolls, and vermiculite with different particle sizes: micron (0.15-0.20 mm), superthin (0.21-0.30 mm), thin (0.30-0.50 mm) and medium (0.50-1.19 mm) moistened with water equivalent to 0.5, 1.0, 1.5 and 2.0 times the weight of the dry subtrate. Germination test was carried out at 30 degrees C. The percentage of normal seedlings was obtained seven days after sowing (first count) and then weekly until 28 days, when abnormal seedlings and dead seeds were also counted. It was concluded that the germination test of ipe seeds can be carried out with thin or medium vermiculite moistened with water equivalent to 1.5 times the dry weight of the substrate. These treatments resulted in higher and faster germination (21 days).