Growth of Eucalyptus urophylla seedlings produced in conventional and water collection trays in degradable tube and polypropylene systems/Crescimento de mudas de Eucalyptus urophylla produzidas em bandejas coletoras de agua e convencional nos sistemas de tubetes degradaveis e polipropileno

• Published in: Ciência florestal 2024-04, Vol.34 (2)
• Main Authors: Cury, Leticia Duron, da Silva, Leonardo Franca, de Oliveira, Victor Crespo, Arthur, Marcela de Mello, Rodrigues, Sergio Augusto, da Silva, Jose Mauro Santana, Guerra, Saulo Philipe Sebastiao
• Format: Article
• Language: English
• ISSN: 1980-5098; 1980-5098
• DOI: 10.5902/1980509873734

The nursery revolution in the 80s occurred with polyethylene tubes, which are still widely used, even with some negative points. The demand to reduce costs in the nursery has driven the evolution of seedling production techniques and products, such as degradable tubes and water collection trays. This study aimed to evaluate under nursery conditions the growth phase of Eucalyptus urophylla clones produced in polyethylene tube systems and degradable material with different occupation levels. The occupancy of 27% and 50% of flat polyethylene trays with 176 cells and 100% of water collector trays with 40 cells were tested. The height, diameter, survival rate, Dickson's Quality Index (DQI), shoot dry matter, and root system dry matter were evaluated 70 days after the experiment implementation. According to the results obtained, the degradable tube and the water collector tray favored the development of the clones in terms of height and DQI. The tubes and trays used in the study did not statistically influence shoot dry matter, root system dry matter, and the total dry matter of the clones. The treatment that used degradable tubes and the water collection tray presented the best mean values of the evaluated growth parameters. Keywords: Alternation of clones; Clone quality; Tray; Degradable tube degradation; Aerial and root biomass A revolucao dos viveiros florestais na decada de 80 ocorreu com o uso dos tubetes de polietileno, sendo ainda muito utilizados, mesmo apresentando alguns pontos negativos. A busca pela reducao de custos no viveiro impulsiona a evolucao de novas tecnicas de producao de mudas e produtos utilizados, como os tubetes degradaveis e bandejas coletoras de agua. O objetivo do estudo foi avaliar em condicoes de viveiro a fase de crescimento de mudas de Eucalyptus urophylla produzidas em sistemas de tubetes de polietileno e de material degradavel com diferentes niveis de ocupacao. Foram testadas a ocupacao de 27% e 50% de bandejas planas de polietileno com 176 celulas e 100% das bandejas coletoras de agua com 40 celulas. A altura, diametro, taxa de sobrevivencia, Indice de Qualidade de Dickson (IQD), materia seca da parte aerea e materia seca do sistema radicial foram avaliadas aos 70 dias apos a implantacao do experimento. De acordo com os resultados obtidos, o tubete degradavel e a bandeja coletora de agua favoreceram o desenvolvimento das mudas em relacao a altura e IQD. Os tubetes e as bandejas utilizadas no estudo nao influenciaram estatisti