Maize is the second largest agricultural crop in Brazil. It reaches high yields as supported by the intensive use of technologies, particularly mineral fertilization, which is normally costly. To lower production costs and improve crop productivity on small farms, the present study tested the efficiency of poultry litter biochar as a source of nutrients in the initial growth of BRS 2022 maize by the ‘diagnosis ...
The dynamics of the organic residues added to the soil are closely related to its mineralization rate. Therefore, the present study aimed to evaluate the organic carbon mineralization in soil samples incubated with different doses of biochar and organic compost from poultry litter. Carbon mineralization was evaluated experimentally by measuring the C-CO2 liberated by incubating 200 g of soil mixed with differen...
The fertilization of vegetables by means of biofertilizers is mainly used by organic agriculture. However, there are few studies published evaluating the potentially pathogenic microbiota to humans in biofertilizers as well as its formulation according to the nutritional needs of the crop. Thus, the objective of this study was to formulate two optimized biofertilizers and evaluate their sanitary characteristics...
Vermicomposting is the process of transforming the little degraded organic material into organic matter stabilized through the action of the earthworms and the microsymbionts. This study aimed to evaluate the effect of the addition of increasing doses of vermicompost enriched with rock dust (MB4®) on soil chemical characteristics and on radish (Raphanus sativus) production.The vermicompost was prepared by incub...
A disponibilidade de K para as plantas depende da quantidade de potássio trocável (Q) e de potássio em solução (I), e da relação Q/I. Objetivou-se avaliar a disponibilidade de K para culturas por meio das curvas Q/I e ajustar as isotermas de Langmuir e Freundlich a dados de adsorção de K em Vertissolo. Foram coletadas amostras de Vertissolo com vegetação natural arbórea (mata) e culturas anuais (roçado) em duas...
Objetivou-se com este trabalho avaliar o efeito da adubação residual da torta de mamona e o uso de água residuária e de abastecimento no crescimento e na produção do gergelim cultivar CNPA G3. O experimento foi desenvolvido em delineamento inteiramente casualizado disposto em esquema fatorial (2 x 5) + 2, com três repetições. O primeiro fator correspondeu a dois tipos de água (abastecimento e residuária) e o se...
Objetivou-se com este trabalho formular um biofertilizante capaz de suprir a necessidade nutricional da cultura do milho através da ferramenta SOLVER do Microsoft Office Excel versão 2001. Para isso, montou-se uma planilha eletrônica contendo as informações referentes a recomendação de adubação para a cultura do milho e a composição química dos diferentes componentes (ingredientes) utilizados na formulação do b...
Increasing number of soils contaminade by lead, can be found nowadays, specialy because of its use in the composition of many industrial products, which are demanded by modern society. For example, lead is used in pipe manufacturing, electrical wire covering, sink, tank and roof manufactering, and specialy in car bateries manufacturing. Thi...