Potencial de espécies forrageiras na recuperação de áreas arenizadas

Abstract

The southwestern part of “Rio Grande do Sul” has an area with sandstone processes of approximately 6 thousand hectares, these areas get unproductive over time. The proportion that the erosive processes evolve to the sandy soils (the sandstone) has presented severity in the expansion of the degradation of the soil. Control projects should be implanted to contain the advance of sandstone and recovery of the ones that are already sandstone areas. Among these resources, revegetation with forage species can be an effective and productive alternative to cultivate in these areas, avoiding aeolian and water erosion in these soils. The chemical fertilization of the soil increases the amount of nutrients, so that their deficiencies, due to the nature of the source material, the climate and the management, are corrected. This work has the purpose to evaluate the viability of the use of coverage crops for the recovery of sanded soils. For this, an experiment will be conducted in the county of Manoel Viana, RS. The experiment will be composed of three blocks and sixteen treatments, eight with coverage crops and eight treatments with coverage crops plus fertilization and liming, being: black oats, ryegrass, vetch, lupinus albescens, forage turnip, black oats + ryegrass consortium, consortium Black oats + vetch and naked soil and for summer crop will be sown Millet in all treatments. After the cultivation of the crops, the results obtained should be observed, through the evaluation of the edaphic fauna, and of the physical-chemical properties of the soil. In addition, the establishment of each forage arrangement with and without fertilization will be evaluated through the percentage of vegetation cover and the amount of dry matter available over time.