Brazil is one of the world’s largest producers of beef cattle and dairy products, which requires high forage yield to attend grass-fed animals’ demand. Among the grass species adopted in the forage production system in Brazil, the Brachiaria genus stands out. This genus comprises nearly 85% of all planted forage area. In general, forage production systems in Brazil are essentially rainfed, and thus susceptible to seasonal soil water stresses. Selecting the suitable Brachiaria cultivar for lands susceptible to periodic waterlogging and dry spells is crucial to enhance forage yield, and consequently, to reduce the environmental footprint of the livestock sector. In this research, we investigated the performance of three recent commercial Brachiaria brizantha cultivars (Piatã, BRS Paiaguás, and MG13 Braúna) extensively adopted in Brazil’s grazing systems subjected to different ranges of soil water potential. For three cutting periods, yield related-variables (e.g., plant height, leaf area, dry biomass, and water use efficiency) were measured. Our results point to the existence of a low drought-resistant trait among cultivars, indicating the need for releasing better-adapted cultivars to cope with reduced soil water availability. All cultivars achieved higher performance at soil water pressure head between −15 kPa and −25 kPa; and in general, the cultivar. Piatã showed slightly superior results to most of the treatments.

The objective was to evaluate the effect of wood ash dose and application management on soil quality attributes in a Cerrado area cultivated with Urochloa brizantha. The experiment was carried out in a randomized block design in a 5 × 2 strip-plot scheme and four repetitions. The ash doses were 0, 8, 16, 24, and 32 t ha-1, and the application management considered wood ash that is incorporated and not incorporated into the soil. The P, K, and pH values of the soil increased with an increase in the doses of wood ash. The soil bulk density decreased by 9.66% with the wood ash doses of 24 and 32 t ha-1 incorporated into the soil. Owing to an increase in the soil pH, a wood ash dose of greater than 16 t ha-1 decreased the enzymatic activity. A wood ash dose of 24 t ha-1 resulted in better conditions for the soil, improving its quality and contributing to the balance and dynamics between the chemical, physical, and biological attributes of the soil, which led to the reduced density and greater availability of P in the soil.

A aquicultura hoje representa uma das atividades mais importantes da cadeia produtiva de alimentos de origem animal no Brasil com uma taxa de crescimento cada vez maior. Devido a isto, é de suma importância conhecer como é a gestão do setor e qual sua importância para a economia nacional deste segmento do agronegócio. Esta revisão teve como objetivo descrever a importância da piscicultura e a gestão do agronegócio pesqueiro no Brasil. Para tanto, foi realizado uma revisão narrativa, com estudos caracterizado como qualitativo que mostrou a complexidade e os detalhes das informações. Assim, a fundamentação teórica deste artigo está divindade em duas seções. A primeira abordou algumas características do agronegócio brasileiro. Já na segunda seção, foi abordado a importância do agronegócio pesqueiro bem como sua gestão para o desenvolvimento social e econômico nacional. O agronegócio pesqueiro nacional além de produzir a carne proveniente do cultivo dos peixes, oferece oportunidades de investimento nos diversos segmentos da cadeia produtiva, como por exemplo, o plantio de insumos para a fabricação de ração, fabricas de ração, medicamentos, vacinas, melhoramento genético, equipamentos e implementos aquícolas. Desta forma, o agronegócio pesqueiro nacional possui grande potencial para atrair investidores nacionais e internacionais que buscam novas alternativas de negócios.