Quality of Guava Seed (Psidium guajava L.) White and Red Varieties on Different Substrates

Abstract

The guava tree is the fruit of the guava tree of the species Psidium guajava L. belonging to the family of Myrtaceae a rustic fruit and adapts to the most varied types of soils. It is a fleshy fruit, thin-skinned, green, or when mature yellowish and very rich in soluble fibers. Seed germination is influenced by factors such as substrate, which can improve germination, resulting in the acquisition of more vigorous seedlings. The experiment was conducted in a greenhouse at the Federal Institute of Education, Science and Technology of Tocantins, Gurupi/TO, in 2017. The seeds of guava Kumagai and Paluma (Psidium guajava L.) used in the experiment were taken directly from the fruit, which was collected in the urban region of Gurupi in March 2017. For the two varieties evaluated, both for the first emergence count and seedling emergence, the substrates stood out: organic compound + black earth + commercial substrate (55% and 37%) (67% and 49%), washed sand + rice straw + black earth (52% and 36%) (52% and 36 %) lower substrates: washed sand (46% and 10%) (66% and 35%) and rice straw + sawdust + black ground (47% and 7%) (59% and 31%), respectively. The substrates: organic compound + black earth + commercial substrate and washed sand + rice straw + black earth provided the highest values of viability and vigour in white and red pulp guava seeds.

Viability and Vigor of Bacaba Seed (Oenocarpus bacaba) in Different Substrates

“…Godoy and Farinácio (2007) [20], highlight that, the sand substrate, in addition to performing the role of supporting seedlings, provides adequate water supply, air, free of phytopathogens, easy handling, low cost, high availability, and long durability. Silva et al (2019) [21] in guava seeds of the white and red variety also verified that the mixture of substrates provided the best viability and vigor results, indicating the organic compound substrates + black sand + commercial substrate and washed sand + rice straw + black soil as the best. Nunes et al (2020) [22], working with Cagaita seeds, verified that, the humus substrates of worm humus + black soil + commercial substrate and commercial substrate + poultry manure + black soli + washed sand provided the highest values of viability and vigor in Cagaita seeds.…”