Vermiculita como substrato para o teste de germinação de sementes de ipê-amarelo

Made available in DSpace on 2013-09-27T14:53:31Z (GMT). No. of bitstreams: 1 WOS000307002600010.pdf: 282117 bytes, checksum: 03f22eca2ca4274a080182925f3521ad (MD5) Previous issue date: 2012-01-01 Made available in DSpace on 2013-09-30T17:58:52Z (GMT). No. of bitstreams: 1 WOS000307002600010.pdf: 282117 bytes, checksum: 03f22eca2ca4274a080182925f3521ad (MD5) Previous issue date: 2012-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:17:03Z No. of bitstreams: 1 WOS000307002600010.pdf: 282117 bytes, checksum: 03f22eca2ca4274a080182925f3521ad (MD5) Made available in DSpace on 2014-05-20T13:17:03Z (GMT). No. of bitstreams: 1 WOS000307002600010.pdf: 282117 bytes, checksum: 03f22eca2ca4274a080182925f3521ad (MD5) Previous issue date: 2012-01-01 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). Univ Estadual Paulista, UNESP, Fac Ciencias Agr & Vet Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil UEG, Unidade Univ Palmeiras de Goias, Goiania, Go, Brazil Universidade Federal de Uberlândia (UFU), Inst Ciencias Agr, Uberlandia, MG, Brazil Universidade Estadual de Londrina (UEL), Dept Agron, Londrina, MG, Brazil Univ Estadual Paulista, UNESP, Fac Ciencias Agr & Vet Jaboticabal, BR-14884900 Jaboticabal, SP, Brazil