ALMEIDA, Romário de Sousa.; ARAÚJO, Maria Pereira de.; MOURA, Luzia Batista.; PIMENTEL, Aline Soares.; LIMA, Kaique Muniz Alvares de.; BARBOSA, Francisca Maria.; GOMES, Azenate Campos.; LACERDA, Alecksandra Vieira de.
Résumé:
Emergence and vigor of Handroanthus
impetiginosus (Mart. ex DC.) Mattos as a function of different
water immersion times. This study aimed to verify the influence
of different water immersion times on the emergence and vigor of
seedlings of Handroanthus impetiginosus (Mart. ex DC.) Mattos.
For this, seeds were subjected to 11 treatments, as follow: control
(T1) and water immersion during 6, 12, 18, 24, 30, 36, 42, 48, 54
and 60 h (T2, T3, T4, T5, T6, T7, T8, T9, T10, and T11,
respectively). Each treatment consisted of four replicates of 25
seeds. Thirty days after sowing, seedlings were evaluated as to
diameter at ground level, root length, aerial part, fresh mass, and
dry mass. The data were subjected to analysis of variance and the
means were compared by the Tukey Test. In the control seedlings
(T1), emergence occurred five days after sowing and in the other
treatments, it started from the eighth day, resulting in the
emergence of 88% and emergence speed index of 2.61. Seed
soaking in water for up to 36 h resulted in more vigorous
seedlings regarding the height, diameter, fresh mass, and dry
mass, evidencing a pattern of productive quality in this species.
Therefore, these data contribute to the optimization of seedling
production of H. impetiginosus, assisting degraded area recovery
programs and the conservation of this species.
