Biochar as a raw material for the production of densified seed carrier capsules
Name: ÁLISON MOREIRA DA SILVA
Publication date: 19/02/2021
Advisor:
Name |
Role |
|---|---|
| ANANIAS FRANCISCO DIAS JÚNIOR | Advisor * |
| RODRIGO SOBREIRA ALEXANDRE | Co-advisor * |
Examining board:
| Name |
Role |
|---|---|
| ANANIAS FRANCISCO DIAS JÚNIOR | Advisor * |
| RENATO RIBEIRO PASSOS | External Examiner * |
| RODRIGO SOBREIRA ALEXANDRE | Co advisor * |
Summary: Biochar is a stable and carbon-rich product, obtained through biomass pyrolysis. Its unique characteristics make this material an excellent soil conditioner, resulting in improvements that vary as the pyrolysis temperature increases. The low density of this component makes its permanence in the soil difficult, being easily leached. Thus, the production of densified biochar capsules aims to overcome transport and leaching problems. The objective of this study was to investigate pyrolysis temperatures and compaction pressures, in the physiological quality of Schizolobium parahyba var. amazonicum seeds, present in densified biochar seeds propagating capsules, and on the morphological characteristics of Schizolobium parahyba var. amazonicum seedlings generated from them. The experiments were performed at the Department of Forestry and Wood Sciences of the Center for Agricultural Sciences and Engineering belonging to the Federal University of Espírito Santo, city of Jerônimo Monteiro, ES. The data were submitted to analysis of variance and, when significant differences were expressed, were performed regression model adjustments and multivariate analyses, which helped in the interpretation of the results. The results indicate that the pyrolysis temperature and the compaction pressure influence parameters associated with the physiological quality of seeds present in densified biochar capsules. However, they do not influence the quality of seedlings generated. The use of densified biochar seeds propagating capsules results in lower physiological seed quality and lower seedling quality than conventional sowing, but even better than seeds added above the substrate, simulating seeds throw or a natural seed rain. When developing, the seedlings have morphological characteristics equivalent to seedlings from conventional seeding. In summary, densified biochar capsules had a lower performance in terms of seed development, but even more effective than natural seed rain, generating quality seedlings and, concomitantly, it has the potential to improve physical, chemical and biological characteristics in the short, medium and long term with the incorporation of biochar to the system.
Keywords: Pyrolysis temperature; Compaction pressure; Germination; Emergency; Seedlings.
