Daniela Biondi

Análise da composição química foliar do ipê -amarelo (Tabebuia chrysotricha(Mart) Standl) na arborização urbana de Curitiba, PR

The knowledgement about the nutritional status of the urban trees has a great importance for the evaluation and adoption of management practices. This work has the objective to investigate the foliar chemical composition of Tabebuia chrysotricha (Mart) Standl in an urban environment. The analyses of the trees were performed under different pollution and soil impermeability levels of the plantation sites. Through the chemical analysis was possible to observe that the P and Zn nutrients differentiate superior trees from inferior categories, while Cu and Zn nutrients, differentiate the place where the trees are planted.

A VEGETAÇÃO NO PAISAGISMO DAS PRAÇAS DE CURITIBA - PR

To investigate the ecological functions that squares play as urban green areas, this research was designed to inventory and characterize the vegetation used in the landscaping of the squares of Curitiba-PR state. All species occurring in 32 squares in the city were identified and quantified. Results show that 141 species were found, belonging to 58 families. Of this total, 60.3% of species are of arboreal life and 56.7% are of exotic origin. The species that appear in more places is Axonopus compressus (grama-sao-carlos), present in 96.9% of cases. Between tree species, Ceiba speciosa (paineira) is the most frequent, appearing in 46.9% of the squares. Rhododendron simsii (azalea) had the highest number of individuals, with 438. It is important to consider the number of individuals, the diversity of species and their characteristics so that the ecological benefits provided by these squares can be guaranteed.

A INFLUÊNCIA DAS DIFERENTES TIPOLOGIAS DE FLORESTA URBANA NO MICROCLIMA DO ENTORNO IMEDIATO

The urban forest generates a microclimate more pleasant for the human being, in its interior as in the near external areas. Thus, the main goal of this research was to analyze the influence that the different typologies of urban forest exert in their immediate surrounding, highlighting quantitatively the differences between the internal and external microclimate to these areas. For this, areas of different types of urban forest were selected in the city of Curitiba-PR: Remaining Forest, Old Green Area, Modern Green Area, Street Trees and Isolated Tree. The influence in the immediate surrounding was analyzed with the mobile transect method, traveling 500 m away from a street adjacent to the selected area, with data collection every 50 m. The results indicate statistical differences between the internal and external microclimate to the typologies of urban forest. During the transect, the temperature was on average 2.3 ° C higher than in the interior of the urban forest typologies, the relative humidity was lower in 4.6 units and the wind velocity 0.2 m / s higher. The greatest difference in temperature and relative humidity between the internal and external environment was found in the Remaining Forest and the smallest in the Street Trees. It is concluded that the different typologies of urban forest exert a significant influence on the immediate surrounding microclimate.

O MICROCLIMA DE DIFERENTES ARRANJOS PAISAGÍSTICOS NA ARBORIZAÇÃO DE RUAS DE CURITIBA - PR

Microclimate improvement is frequently stated as one of the benefits generated by urban forestry. However, there are still few studies that quantitatively approach this issue. The goal of this study was to quantify the microclimatic difference between streets with and without trees, for each season and landscaping type. For this, three locations were chosen. Each location showed different species composing landscaping types: Tipuana tipu, Handroanthus chrysotrichus, and Lafoensia pacari with Parapiptadenia rigida . A Kestrel® mini station was placed on a street with trees and another one on a street without trees. The daily period for collecting this data was from 9 a.m. to 3 p.m., with monitoring intervals of 1 minute, repeated during the four seasons of the year, beginning in the winter of 2011. The microclimatic variables analyzed were temperature, relative humidity and wind speed. The results indicated that the streets with trees always had lower temperatures and greater relative humidity values than the streets without trees. The greatest temperature difference was observed in the summer (2.5 o C) and the smallest one in the winter (1.2 o C). For relative humidity, the differences were between 6.4% (spring) and 5.6% (winter), and for wind speed the greatest difference was found in the winter (0.17m/s). Landscaping that uses Tipuana tipu on both sides of the street, planted in a way such as to make their canopies entangle and form a tunnel, is the best choice for a more pleasant microclimate in all seasons of the year.

ANÁLISE DA QUALIDADE DA PAISAGEM DA ORLA MARINHA DE PONTAL DO PARANÁ, PR, BRASIL

O estudo da qualidade da paisagem e uma ferramenta de grande importância para promover um planejamento adequado das regioes, pois permite compreender o processo de funcionamento e dinâmica da paisagem, o que evita a deterioracao dos recursos naturais. O presente estudo teve como objetivo realizar uma analise da qualidade da paisagem da orla marinha do municipio de Pontal do Parana, PR. Paraxa0 isto foram aplicados os dois metodos de estudo da paisagem, direto e indireto. Com o metodo direto realizou-se uma valoracao visual in loco e com o indireto, uma analise dos componentes por meio de fotografias para averiguar a participacao de cada elemento no valor total da qualidade da paisagem. Os resultados indicaram que a uniao dos dois metodos foi uma ferramenta muito util e adequada, possibilitando uma classificacao da paisagem mais criteriosa do que as obtidas apenas por um metodo. Concluiu-se que os atrativos naturais e o grau de limpeza da praia foram os fatores responsaveis pela elevacao da qualidade da paisagem. Por outro lado a interferencia antropica e a supressao da vegetacao foram os elementos responsaveis pela reducao da qualidade.

Avaliação da inflamabilidade de Ligustrum lucidum Aiton (Oleaceae) para uso potencial em cortinas de segurança na região sul do Brasil - DOI:10.5039/agraria.v4i4a11

Ligustrum lucidum Aiton (Oleaceae) e uma das especies mais plantadas em arborizacao urbana e em rodovias na regiao sul e sudeste do Brasil. E uma arvore rustica de rapido crescimento, com copa larga e densa, muito utilizada tambem para formacao de cercas vivas. Estas caracteristicas, alem da baixa inflamabilidade, sao muito importantes para formacao de cortinas de seguranca. O objetivo dessa pesquisa foi avaliar as caracteristicas de inflamabilidade de Ligustrum lucidum para indicacao de seu uso em cortinas de seguranca na interface area urbana/area florestal e nas margens de rodovias com grande risco de incendios florestais. A avaliacao da inflamabilidade foi feita atraves de observacoes das variaveis velocidade de propagacao e intensidade do fogo em queimas experimentais de parcelas de 1 m 2 constituidas de folhas e ramos de L. lucidum em dois niveis de umidade: umidade do material recem coletado da arvore e material seco em estufa a 75 °C por 48 horas. Os resultados indicam que a inflamabilidade da especie estudada e baixa, mesmo em condicoes reduzidas de umidade, embora seja necessario investigar as caracteristicas de inflamabilidade da especie em condicoes de intensidade do fogo mais elevada.