The objective of this study was to evaluate the effect of filter cake biochar on the chemical and microbiological attributes of a dystrophic red-yellow latosol cultivated with macaúba (Acrocomia aculeata), araçá (Psidium firmum) and cajuzinho do cerrado (Anacardium humile), species native to the Cerrado. Thus, the responses of soil attributes were evaluated 120 days after transplanting the seedlings using four doses of biochar (1%, 2%, 4% and 8% v/v) and two control treatments (one with soil correction and fertilization and the other with no fertilization). The attributes evaluated were pH, contents of calcium, magnesium, phosphorus, potassium, CTC, total and microbial organic carbon and nitrogen, and C:N ratio. For the soils cultivated with the three Cerrado species, the 1% dose of biochar and mineral fertilization were the treatments that best conditioned the soil during the cultivation period and promoted a better response of the chemical and microbiological attributes of the soil.
Os sistemas integrados de produção agropecuária podem promover melhoria da qualidade física, química e biológica do solo. A obtenção de efeitos sinérgicos entre os diferentes componentes de produção permite a sustentabilidade dos sistemas agropastoril, silvipastoril, agroflorestal e agrossilvipastoril. Aumentos na estocagem de carbono podem ser obtidos a partir da implantação de sistemas integrados de produção, além de maiores retornos econômicos. A diversificação da produção possibilita a redução de riscos frente às oscilações de preços de mercado. Contudo, estudos envolvendo a estocagem de carbono e, principalmente, a viabilidade econômica de sistemas integrados cultivados em região semiárida são limitados. Neste contexto, objetivou-se apresentar resultados de estocagem de carbono e retorno econômico obtidos com a adoção de sistemas integrados de produção no semiárido, visando apresentar resultados que possam subsidiar a implementação de projetos futuros, permitindo a obtenção de ganhos nos estoques de carbono e maior viabilidade econômica em condições de baixa disponibilidade hídrica.
Technological innovation in rural areas guarantees the maintenance and subsistence of rural producers. Additionally, it is mandatory to use strategies aimed at reducing costs in animal production and reducing the environmental impact involved, making it challenging in the current global scenario. Thus, it is necessary to develop new alternative methods of production aimed at small scales, which can be implemented in small properties with reduced capital investment. In this sense, the objective was to describe the development of a system capable of inducing the production of black soldier fly larvae-BSFL (Hermetia illucens) through the attractiveness of egg laying of wild adults. To make the larvae production system, the following were needed: a plastic drum, with a capacity of 200 liters, 10 meters of 8mm silk rope, 1.5 m2 of wire mesh with 25mm x 20mm mesh, 1 m2 3mm x 2mm nylon mesh, plastic faucet for draining the slurry, one meter of 20mm diameter hose, two plastic containers with capacity of 20 liters for collecting the slurry and pre-pupae; besides equipment for cutting and finishing the drum. The System was supplied with organic plant material from daily household disposal, and other plant residues produced on the property. The development of this System can provide great social and economic viability, as it can be implemented in small rural properties for the treatment of organic waste. The mechanism presented good performance for the recycling of organic waste, and also for the production of BSFL, with satisfactory quantity collected daily.
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