Botanical Analysis of Seed Bank in a Cultivated Area of Integration Livestock Agriculture

Abstract

The seed bank has an ecological role of great importance in the re-composition of new individuals in plant communities. In the integration system livestock agriculture, the seed bank usually presents a serious problem, the agricultural activity, because this type of activity favors weed infestations over a long period of time. The different soil management systems and cultures have decisive influence on germination and composition of the flora of an area and in the seed bank of the agricultural soil. The objective of this study was to identify weed species that emerged during the analyzed period of the seed bank at different depths in an area of integration livestock agriculture. The present study was conducted in an area of integration livestock agriculture in the Center of Agrarian Sciences, of the Federal University of Alagoas (CECA - UFAL), located in the municipality of Rio Largo - AL, Brazil, in the year 2017. 20 samples at each depth: 0.0 to 10.0 cm and of 10.0 to 20.0 cm were collected. In possession of the data, it was possible to determine several phytosociological characteristics. It was observed in the composition of the seed bank high diversity of species with great variability. The seed bank has a greater diversity in the first soil layer (0.0 to 10.0 cm), presenting in its total density a decrease to increase the depth.