Abstract
Anthropic action with intense fruit exploitation for medicinal purposes has caused genetic erosion of ‘andirobeira’ (Carapa guianensis Aublet.), associated with unusual phasic germination, generating the need for research to obtain vigorous seedlings. Therefore, the objective of this work was to evaluate different substrates on seedling germination and phasic development, contributing to the conservation of this important, very threatened, species. The experimental design used was randomized blocks, with three treatments: Yellow Latosol (LA), Quartzarenic Neosol (NQ) and Haplic Gleysol (GH), and three replications of 40 plants each. The following characteristics were evaluated: seedling height (AP), root length (CR), stem diameter (DC), and leaf area (AF), along with dry weights from seeds (PSS), roots (PSR), stems (PSC) and leaves (PSF), in addition to the total dry weight (PST), relative growth rate (TCR), and net assimilation rate (TAL). The conclusions were that the days after emergence do not influence the TCR and TAL, but the substrate characteristics affect seedling development. The substrate LA, relative to NQ and GH, should be chosen to obtain seedlings with better development, resulting in superior seedlings. Indeed, the development of seedlings in NQ and GH substrates indicates that their use in the recovery of degraded areas is possible, and the andirobeira presents phasic seedling development, which must be known for effective ecological conservation. Damage to the cotyledons must be avoided to supply the period in which the seedling returns to the heterotrophic state, otherwise the subsequent development of the plant may be compromised.
Publisher
Universidad Nacional de Colombia
Reference52 articles.
1. ABREU, D. C. A., PORTO, K. G., AND NOGUEIRA, A. C. (2017). Métodos de superação da dormência e substratos para germinação de sementes de Tachigali vulgaris L.G. Silva, and H. C. Lima. Floresta e Ambiente. 24, 1-10. https://doi.org/10.1590/2179-8087.071814
2. ARAÚJO, R. C., AND PONTE, M. X. (2015). Agronegócios na Amazônia: ameaças e oportunidades para o desenvolvimento sustentável da região. Revista de Ciências Agroambientais. 13(2), 101-114. https://doi.org/10.5327/rcaa.v13i2.1190
3. ARAÚJO, V. C. (2005). Roçados ecológicos: sistemas de plantios baseados na fenologia das espécies para um rendimento sustentado. Manaus: Gráfica Silva.
4. BACCA, P. P., ZULUAGA, J. J., IVEZ PEREZ, J., AND PALACIO, M. R. (2020). Evaluation of pre-germination treatments in Carapa guianensis AUBL. Revista de Ciências Agrícolas, 37(2), 56-66. https://doi.org/10.22267/rcia.203702.138
5. BATTILANI, J. L., SANTIAGO, E. F., AND SOUZA, A. L. T. (2006). Morfologia de frutos, sementes e desenvolvimento de plântulas e plantas jovens de Maclura tinctoria (L.) D. Don. ex Steud. (Moraceae). Acta Botânica Brasileira, 20(3), 581-589. https://doi.org/10.1590/S0102-33062006000300008