Determination rate of vegetable coverage in a cerrado soil of tropical climate
Cover plants can meet nutritional needs of subsequent plants, protect soil from erosion and cause suppressive effect on weeds. The objective of this work was to evaluate the rates of decomposition of cover crops at different times. The treatments were: T1-Brachiaria Mg5, T2-Crotalaria, T3-Crotalaria + Millet, T4-Crotalaria + Sorghum, T5-Spontaneous vegetation (control), T6-Millet BN2 and T7-Sorghum. In order to monitor the decomposition dynamics, four 100g bags per treatment (4 replicates) of fresh matter were collected, which were placed in Litter Bags and deposited again in the field in their corresponding treatments two days after handling the species. The Litter Bags were collected on six different dates (0, 5, 15, 30, 60 and 90 days) to determine the remaining biomass. Brachiaria does not present a balance between protection and release of residues to the soil, because it presents a slow rate of decomposition of residues, since the consortium of crotalaria and sorghum, are better in relation to cover and nutrition of the soil, since it determined at the same time protection and release nutrients.