OLIVEIRA, A. S.; http://lattes.cnpq.br/4453797181877359; OLIVEIRA, Alderisvânia Santos.
Resumo:
Due to the semi-arid climate of the caatinga, its vegetation and fauna undergo some
adaptations, such as the loss of leaves during the dry season to avoid the loss of
water, the presence of compound and mobile leaves and because it is a region with
little rainfall, the species existing in this region are adapted to temperatures
high levels and lack of water for long periods of time. The numbness in
seeds is a universal phenomenon that is directly linked to their morphology,
some species present dormancy in their integument, making it necessary
evaluate the type of seed and see which pre-germination method to use for
overcoming dormancy. The present work aimed to evaluate the factors
that influence the germination of Mulungu (Erythrina velutina) seeds,
Craibeira (Tabebuia aurea) and Barriguda (Ceiba glaziovii) to evaluate the influence of
substrates in the development of species. Seeds from three
tree species from the caatinga: Barriguda (Ceiba glaziovii Kuntze), Mulungu
(Erythrina velutina) and Craibeira (Tabebuia aurea). The treatments used were:
sandy soil (T0 control); sandy soil composed (T1) and compost (T2), all in
triplicates. The results showed that the control using sandy soil and T1
positively influenced the germination of the Barriguda species, presenting a
total of 16 seeds germinated, 9 for the T0 control and 7 for the treatment
1(Ceiba glaziovii Kuntze). Differing with the results obtained by the other two
species analyzed, Mulungu (Erythrina velutina) presented the result of 2
germinated seeds for treatment 1 and Craibeira (Tabebuia aurea) obtained a
total of 4 seeds germinated, 2 in the T0 treatment (control) and 2 for T2. A
low germination rate found in this experiment may have been influenced
due to excess water, in the case of the mulungu species, it presents dormancy
Therefore, mechanical scarification can be used as a pre-germination method for
seeds of the barriguda species present difficulties in their
germination, the seeds of the craibeira species tend to germinate with
easier, but in this work both species showed results
undesirable in relation to germination, which may have occurred due to factors
external and internal.