Caracterização de mudas para arborização urbana disponíveis em viveiros públicos no estado do Paraná

Abstract

Urban forests has gained increasing prominence in the scenario of municipalities in the state of Paraná, generating a demand for a greater volume of information on the different products and services related to the execution of the Municipal Plans for Urban Afforestation. Considering the pattern of seedlings recommended for planting in urban areas, it is urgent to produce exploratory research that characterizes the sector of seedlings for afforestation in the state of Paraná, and mainly, the diversity, availability and quality of seedlings available in the state. The objective of this research is to carry out the characterization of seedlings for urban afforestation in noncommercial urban afforestation nurseries. Seven non-profit nurseries located in different cities and regions of the state were evaluated, in which five seedlings were sampled in each of the 93 seedling lots evaluated, totaling 465 sampling units. Only two lots, out of the ninety-three evaluated, were considered suitable for urban plantations, based on the parameters of diameter at breast height, minimum height and container size. The indicators with the highest failure rates in achieving the minimum parameters were Diameter at Breast Height (DBH), Total Height and Container Size, respectively. Only two batches presented the minimum characteristics recommended in the state of Paraná. None of the evaluated nurseries presented average parameters that meet the state guidelines for seedlings of urban forestry. The research showed the scarcity of information at the national and state levels about seedlings for urban forestry, making access to information difficult and reducing technical security for carrying out large projects for the implantation of tree seedlings in urban areas.