Nitrogen fertilization in wheat is the item that most impacts production costs when it comes to fertilization, due to its importance and demand for this crop. Thus, organic fertilization and nitrogen fixing bacteria can be management strategies to supply the nitrogen demand. The objective of this study was to evaluate the impacts of the bacterium A. brasilense associated with organic fertilization and mineral fertilization on some plant parameters and on the final productivity of wheat grains. The experimental design was a randomized block, with 8 treatments and 8 repetitions, with the following treatments: T1: Control; T2: A. brasilense; T3: 100% N-mineral; T4: 100% N-mineral + A brasilense; T5: 50% N-mineral + 50% N-organic; T6: 50% N-mineral + 50% N-organic + A. brasilense; T7: 100% N-organic; T8: 100% N-organic + A. brasilense. The parameters of the plant and the final productivity of wheat grains showed that the use of the bacterium A. brasilense was not an efficient strategy, however, in relation to the fertilization sources in the final grain productivity, the use of urea isolated or associated with organic fertilization did not differ from each other and were superior to the other treatments.
The use of soil cover plants and alternative sources of nitrogen fertilization can promote improvements in the biological characteristics of the soil. The objective of this study was to determine the contribution of the isolated and/or intercropped cultivation of ground cover crops in autumn/winter and the use of poultry litter as a source of N in the wheat crop in succession on the soil mesofauna and macrofauna community. The experimental design was randomized blocks, with split plots, in a factorial arrangement (4 x 4), with three replications. The collections of the edaphic fauna were realized with pitfall traps PROVID in plots of 15 m². The edaphic fauna orders, abundance, Shannon diversity, Simpson dominance, Pielou evenness and the family of organisms of the order Collembola were evaluated. The use of ground cover plants in autumn/winter, induced a greater abundance of edaphic fauna organisms, which were mostly represented by the order Collembola, belonging to the Entomobryidae family. The isolated or intercropped cultivation of cover crops, associated with the use of N via poultry litter, enabled a greater diversity of organisms and a uniform distribution of different groups in the edaphic community.
Modo de acesso: World Wide Web Inclui bibliografia 1. Tecnologia de Alimentos 2. Alimentos 3. Nutrição I. Título CDD-664.005 Sônia Márcia Soares de Moura-CRB 6/1896 O conteúdo dos artigos e seus dados em sua forma correção e confiabilidade são de responsabilidade exclusiva dos seus respectivos autores.
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