Sobrevivência e crescimento inicial de espécies arbóreas plantadas no campus da UFRB em Cruz das Almas para arborização urbana

Abstract

Urban afforestation becomes important as trees provide multiple benefits. However, choosing inappropriate species for the location can generate conflicts with urban facilities and passersby. The assessment of initial growth and survival, correlating with local climatic factors, becomes important as it will obtain data on the species evaluated, and if their development is satisfactory, they can be recommended for afforestation. In this work, four species were evaluated: 1 – Caesalpinia peltophoroides, 2 – Anadenanthera sp., 3 – Tabebuia chrysotricha, 4 – Tibouchina granulosa. The seedlings were planted on the access roads to the UFRB buildings, lined up 8 m apart, in pits measuring 0.6 m in diameter and 0.5 m deep, starting in April 2011. In addition to the measurements, climatological data were obtained from temperature, relative humidity, rain and sunshine, recorded by the Embrapa Mandioca e Fruticultura de Cruz das Almas climatological station. Development data were correlated with climatological data. Excel and statigraphics software were used for tabulation, correlation analysis and production of data graphs. The species with the highest percentage of survival was species 2 and species 4 had the lowest percentage. Species 2 showed the greatest growth and 3 and 4 the smallest. The species that showed the greatest development in CAC was species 2. Development in height showed high values of negative correlations with relative humidity and positive correlations with evaporation, for species 1, 2, and 3. These correlation values showed statistical significance, with 95% probability. Species 4 did not show a correlation between height development and these variables.