Viability and Vigor in Jackfruit Seed (Artocarpusheterophyllus) Subjected to Different Substrates

The use of substrates is a good option and should present some important characteristics, such as availability of acquisition and transportation, absence of pathogens, richness in essential nutrients, suitable pH, texture and structure. However, each species exhibits different behavior on the same substrate, it is necessary to scientifically verify which substrate or combination of these allows obtaining seedlings with higher physiological quality. The experiment was conducted in a greenhouse at the Federal Institute of Education, Tocantins Science, and Technology, Gurupi/TO. Jackfruit seeds (Artocarpus heterophyllus) were used, directly removed from the fruits that were collected in the same period. The highest root length value was obtained when the seeds were sown in the substrates: BS (13.9 cm), HW + WS + BS (14.6 cm), PP + Sawdust + BS (13.8 cm) and CS (17 cm), intermediate value on the WS substrate (11.9 cm) and low on CS + BM + WS (6.6 cm). It was also observed that the highest length value of shoot was obtained in BS substrates (20.7 cm), HW + WS + BS (18.2 cm), PP + Sawdust + BS (16,5 cm) CS (16.4 cm) and low on the WS substrates (12.9 cm) and CS + BM + WS (7.2 cm). Regarding the first emergency count and emergence of seedlings, depending on the different substrates, once again stood out the BS substrates (65% and 85%) and CS (68.3% and 98.3%). The CS provided the highest values of viability and vigor in jackfruit seeds, followed by the Substrate BS.