Sobrevivência e crescimento inicial do açaizeiro (Euterpe oleracea Mart.) em recuperação de ecossistema ripário, São Domingos do Araguaia-PA

Abstract

The riparian ecosystems are areas found along the watercourse being constituted by the flora, fauna and the riparian water resources. They also play important ecological and biological functions for the preservation of water resources in a basin, such as protection against erosion, increased water quality and regulation of river flows. Even it is proven the importance of these ecosystems these areas are not spared by human interventions. In this context, the aim of this research was to evaluate the survival and early growth of açaí BRS - Pará, in riparian ecosystem at Fazenda Cristalina in São Domingos do Araguaia-PA. soil characteristics were raised predominant vegetation and brightness characteristics according to these experimental area was divided into sub-areas I, II, III and IV, each containing one plot. four installments of açaí were used, with dimensions of 24x12 m, distributed casually along the stream, each containing 81 plants and were assessed the 20 central plants. The study was conducted over 10 months and the evaluations were every 60 days in the interval between the ten months from January to October 2015, a total of five ratings. The parameters evaluated were survival and growth in height and stem diameter. The data collected in the field were subjected to analysis of variance by Tukey test at 5% probability in Sisvar program. Regarding the survival rate was no difference between the evaluated months, with low survival in periods of low rainfall. Subarea I and II showed respectively 80% and 70% survival. Already subareas III and IV obtained the total mortality, showing that the conditions of the subareas and rainfall influenced the seedlings in different ways. The growth of açaí in height and stem diameter in general was significant, differing between the months of evaluations. There were significant differences between sub-areas, and the subarea I with the highest growth in height and stem diameter and survival. In this sense, the açaizeiro has potential for recovery riparian ecosystem since they are planted in damp areas and shaded.