SHADING IN EMERGENCY OF SEEDLINGS AND ON THE INITIAL GROWTH OF Dipteryx alata Vog.

• Autor(a) principal: Mota, Leandro Henrique de Sousa
• Data de Publicação: 2012
• Outros Autores: Scalon, Silvana de Paula Quintão, Heinz, Rafael
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/6611
• topic: seeds; light; native plant; cerrado; seedlings production; sementes; luz; planta nativa; cerrado; produção de mudas

http://dx.doi.org/10.5902/198050986611This work was carried out in order to evaluate the potential of germination of the seeds and the seedlings growth of  baru (Dipteryx alata) in different levels of shading. To evaluate the emergency, the sowing was realized in trays of cells contends Plantmax® substratum + land + sand + chicken manure in proportion of (1: 1: 1: 0,5) and kept  in the full sun, 50% and 70% of shading. The experiment was realized in design entirely randomized with three levels of shading in four repetitions of 25 seeds. It was evaluated the percentage and the velocity of the emergency index. To evaluate the initial growth, the seedlings were transplanted and, three repetitions of 15 changes totalizing 45 seedlings were kept in its respective shading.  The experiment was realized in a complete randomized design in factorial 3 (shading levels) x 5 (times of evaluation for height, diameter of collect, total chlorophyll, transpiration, stomatal conductance and photosynthetic rate) and 2 (times of evaluation for leaf area, length of root, fresh and dry mass). The shading levels did not influence the percentage and the velocity index of seedling emergency.