Produção de biomassa de plantas de cobertura e seu efeito sobre a estrutura do solo

Abstract

Cover crops play a fundamental role in the crop rotation program in the no-tillage system. Therefore, it is essential to study its effects on the soil structure. The present work sought to evaluate the effect of five species of spring / summer cover plants, on their dry mass production and on the succession of oat culture, on soil aggregation, density, porosity and nitrogen accumulation. The different treatments were the five species of plants, namely: feijão guandú, mucuna cinza, crotalaria juncea, capim-sudão and milheto. The experiment was carried out in four randomized blocks, where after cultivation of cover crops, black oat culture was used in succession. The experiment was carried out in four randomized blocks, where after cultivation of cover crops, black oat culture was used in succession. During the flowering period of the cover plants, the aerial part was collected in an area of 1 m2 to determine the dry mass. Soil collections to evaluate aggregation (layers 0-10 and 10-20 cm), density and porosity (layers 0- 5, 5-10, 10-15 and 15-20 cm) were carried out during the senescence period of oats black. There was a significant interaction for the production of dry matter between the summer cover plants, where the millet stood out in relation to the others. For the other evaluations, there was no significant interaction by the Tukey test with a significance level of 5%.