Sobrevivência e crescimento inicial de mudas de cajazeira (spondias mombin l.) em recuperação de ecossistema ripário no sudeste paraense

Abstract

The riparian ecosystems play important ecological services for the maintenance of water resources, can be cited the protection of the banks of watercourses against erosion process, regulating the flow of rivers and the maintenance of biodiversity. Despite its environmental importance of these areas are not spared the anthropic process that becomes disabled as the provision of ecological services. An alternative to the reversal of this situation is the recovery process of these ecosystems by planting native species. The hog plum (Spondias mombin) is a species with great potential for the rehabilitation of riparian areas in the Amazon, it is adapted to the climate conditions of these environments. In this context, the aim of this study was to evaluate the survival and early growth of hog plum seedlings (S. mombin), used in the restoration of a riparian ecosystem in São Domingos do Araguaia, Southeast Pará. Four plots of 12 x 24 m were deployed along the banks of a stream of a riparian area degraded by the action of extensive cattle, located in Farm Cristalina, São Domingos do Araguaia. The plots were located within sub-areas had different soil conditions, moisture, and light. In each plot were planted 81 seedlings cajazeira and the 20 plants were evaluated. The evaluations were bimonthly, between the period from January to October 2015. The parameters were evaluated in relation to survival, height and stem diameter of seedlings. The collected data were systematized and submitted to Tukey test (p ≤ 0.05) using the statistical program SISVAR version 5.6. The survival of seedlings was considered satisfactory, with a rate of 75%, since it remained within the levels recommended by different authors. Regarding growth, regardless of the installments, the seedlings obtained an increase of 45 cm in height and 7 mm in stem diameter. There was a significant difference between the months of assessment for both height and for the stem diameter, and the average September were far superior to the others. the experimental plots, there was also significant difference Comparing, showing that the conditions of the plots influenced the seedlings in different ways, with the portion 2 that better results in relation to the evaluated parameters, indicating that the study conditions, the species adapted better on flat ground conditions, firm and deep, with a low clay concentration with good water availability and partial light. The explanation for this performance of the seedlings can be attributed to the ability and the kind of resistance strategies and factors such as planting time, quality and genetics of plants. In a preliminary analysis, it can be said that the cajazeira shows potential for the recovery of degraded areas.