Plant spacing for Malva (Urena lobata L.) seed production in Manaus-AM region

• Autor(a) principal: Bentes, Jones Gomes Bentes Gomes
• Data de Publicação: 2017
• Outros Autores: Pereira, Henrique dos Santos, Mendes, Angela Maria da Silva, Castro, Albejamere Pereira, Cunha, André Luiz Borborema da
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/2288

 Malva (Urena lobata L.) is the most important crop for production of natural fibers in the state of Amazonas. However, commercial seed production has so far been based on extractive collection systems in areas where the species spontaneously grows in northeastern Pará municipalities. Therefore, the objective of this work is to contribute to the definition of technical recommendations for the development of seed production systems, by evaluating the effect of different spacing on plant growth and seed productivity. The work was conducted at the experimental farm of the Federal University of Amazonas, in Manaus, with propagation material from the municipality of Capitão Poço - PA. The experiment had a randomized block design with three treatments: (T1) 1.0 x 1.0 m; (T2) 1.5 x 0.5 m (T3) 1.0 x 0.5 m, with 8 repetitions of five plants. The following characteristics were evaluated: plant height (cm), stem diameter (cm), number of branches, flowers and fruits (green and ripe), seed/plant weight (g) and dry weight of plants (g). The data were submitted to analysis of variance by F test and pairwise comparisons of means through the Tukey test. There were significant differences between treatments for the variables: number of flowers, plant dry weight, number of green fruits, number of ripe fruits, and the dry weight of the seeds. The T2, with a sowing density of 1.33 plants/m2 and average productivity of 60 g of seeds per plant, is the most recommended for the production of Malva seed in the Manaus region.