SANTOS, W. S.; http://lattes.cnpq.br/2740078677270182; SANTOS, Wisla da Silva.
Abstract:
Pseudobombax marginatum (A.St.-Hil., Juss. & Cambess.) A. Robyns is a plant of the
Malvaceae Family and Bombacoideae subfamily, popularly known as Embiratanha, which
occurs in the semiarid region of Northeast Brazil. It presents itself as a species with relevant
socioeconomic and environmental potential, however, the slow and uneven germination
process is a problem for the production of seedlings. In this sense, the objective was to
investigate the overcoming of dormancy of seeds subjected to different temperatures and
vegetative growth in different concentrations of pultry manure. The experiments were
conducted in the botany and biochemistry laboratories and in the greenhouse of the Federal
University of Campina Grande- Education and Health Center, in the municipality of Cuité -
PB, starting on April 19 and ending on July 27, 2021. The experimental designs were
completely randomized (DIC) with four treatments and eight replications for the first
experiment, where, T1= water at 25°C; T2= water at 50°C; T3= water at 75°C and T4= water
at 85°C, and five treatments and four repetitions for the second, T1= 100% soil; T2= 95% soil
+ 5% poultry manure; T3= 90% soil + 10% poultry manure; T4 = 85% soil + 15% poultry
manure and T5 = 80% soil + 20% poultry manure. The analyzed variables were the Emergency
Percentage (%E), Emergency Speed Index (IVE) and Dickson Quality Index (IQD). Seed
germination was evaluated according to the Rules for Seed Analysis (RAS). The collected data
were submitted to analysis of variance, and the means of the characteristics compared by the
Tukey test, at 5% probability, through the computational application Sisvar. For the first
experiment, the results showed that the temperature of 85°C provided a faster and more uniform
seed emergence, as well as higher values for %E and IVE. The seeds of the species submitted
to immersion in water at room temperature (T1) and at a temperature of 50°C (T2) had their
vigor affected due to the occurrence of microorganisms due to the slow and uneven
germination. In the second experiment, the best results were obtained for %E and IVE in the
treatments 100% soil (T1) and 85% soil + 15% poultry manure (T4), but the addition of poultry
manure does not provide good performance for the species. For the Dickson quality index
(IQD), treatment 1 corresponding to 100% soil, was the one that presented the best result,
however far from the ideal, even with vigorous seedlings, but with the need for further
investigation to improve the index itself.