Vigor nutricional de espécies arbóreas da arborização viária do bairro Margarida Galvan - Dois Vizinhos/PR

Abstract

This project seeks to evaluate the nutritional condition and vigor of the trees planted in different road types of flooring in the neighborhood Margarida Galvan, in the municipality of Dois Vizinhos - PR. For the implementation of the project was to be the inventory of urban trees the neighborhood, which made up the 11 census blocks present in the district. Chemical analyzes leaf was it necessary to collect leaves of 55 individuals, which corresponded to Schinus molle, Ligustrum lucidum and Cinnamomum zeylanicum, in which we analyzed the levels existing macronutrients (N, P, K, Ca2+ and Mg2+). To obtain the density of pavements termed as grass, bare soil, stone and cement, was it necessary to open 29 trenches at depths of 0-30 cm and 30-60 cm. Thus, we found 17 families, 24 genera and 25 species, and the individuals named as Schinus molle showed 53% of trees in the neighborhood, beyond this factor, we found 88% of Schinus molle, 71% of Ligustrum lucidum and 5% Cinnamomum zeylanicum with presence of drastic pruning. Regarding the density of pavements studied, there was obtained 1.19 g cm-3 the layer of 0-30 cm and 1.15 cm-3 in the 30-60 cm layer to the surface covered by grass, which was considered with good density. As for leaf analyzes may be noted that the participants had good levels of N, P and K, but for Schinus molle and Cinnamomum zeylanicum met deficiency of Ca2+ and Mg2+, which attempt to correct this deficiency, indicated to fertilization site. It was also observed that individuals located in the floor considered permeable obtained were the best conditions for the absorption of macronutrients. Therefore, with this work can be noted and observed that the system of pruning employed in the district is considered erroneous, which considerably affects the vigor of individuals. We also noticed that the attacks of injuries on urban trees are in a slight degree, which can be considered to be reversible if the pruning method performed is replaced. Thus, it is concluded that one should promote tax incentives for residents who use permeable pavement on the sidewalk of their homes, because these allow better water infiltration and better availability of nutrients, which provides factor (if managing individuals so correct) and longevity of trees in urban areas, hence less spending for administrative agencies, in addition to providing greater force for individuals and better quality for the population.