RESUMO: A berinjela tem como centro de origem a China e a Índia. Seu cultivo apresenta elevada importância pelas propriedades nutricionais dos frutos, principalmente vitaminas e minerais. Este trabalho teve o objetivo de avaliar o crescimento de berinjela verde em diferentes substratos, cultivada em vasos de 13,0 litros. O experimento foi conduzido num delineamento inteiramente casualizado, com os seguintes tratamentos: 100% de esterco bovino; 75% de esterco bovino + 25% de húmus de minhoca; 50% de esterco bovino + 50% de húmus de minhoca; 25% de esterco bovino + 75% de húmus de minhoca; e 100% de húmus de minhoca. A semeadura foi realizada em 08 de dezembro de 2012 e o transplante para os vasos no dia 03 de janeiro de 2013. Foram avaliadas as alturas das plantas e o número de folhas aos 10, 20, 30, 40, 50 e 60 dias após o transplante. Foram determinadas as taxas de crescimento absoluto e relativo. Os substratos compostos por 50% de esterco bovino + 50% de húmus de minhoca, 25% de esterco bovino + 75% de húmus de minhoca e 100% de húmus de minhoca são os que proporcionaram o maior desempenho de crescimento. Os substratos com 50% ou mais de húmus de minhoca podem ser indicados para a produção de berinjela verde em vasos.

O enxofre apresenta grande importância para o desenvolvimento das culturas, sendo normalmente constatado o aumento da produtividade com o fornecimento deste nutriente em cobertura, entretanto, há poucos estudos que relatam o efeito da adubação com enxofre na cultura da rúcula. Portanto, o objetivo foi de avaliar o desenvolvimento da cultura da rúcula submetida à adubação com enxofre aplicado em cobertura. O delineamento experimental utilizado foi o de blocos ao acaso, com cinco tratamentos (0; 20; 40; 60; 80 mg de S planta-1) e quatro repetições, cada parcela foi constituída por 5 vasos, com quatro plantas cada. Durante o desenvolvimento das plantas foi avaliada a intensidade de cor verde das folhas aos 16, 23 e 30 dias após a emergência. Aos 30 dias após a emergência (final do ciclo) foram avaliados o número de folhas, altura, massa seca da parte aérea, massa seca da raiz e massa seca total. A adubação com enxofre em cobertura aumenta a intensidade de cor verde das folhas de rúcula.

Organo-mineral fertilizers are an opportunity for technological innovation, because allow the correct disposal of waste from various agroindustrial sectors, which is a global problem, in order to add value to the by-product generated, as prioritized in reverse logistics. In this sense, the objective of this work was to evaluate the effect of organic matter sources on the composition of organo-mineral fertilizers in relation to the exclusive use of mineral fertilizers in cultivation of grain sorghum. The experiment was carried out at the Experimental Farm of the Federal Institute of the Triângulo Mineiro, located in the municipality of Campina Verde, State of Minas Gerais, Brazil. The experimental design was a randomized block with eight treatments and four replications arranged in a 4 × 2 + 2 factorial scheme, corresponding to: four levels of organo-mineral fertilizers (70, 100, 130 and 160% of the recommended dose of phosphorus), two sources of organo-mineral fertilizers (sewage sludge and filter cake), and two controls (without and with recommended mineral fertilization). The evaluations were: height of stem, number of leaves and stem diameter at 30, 60, and 90 days after sowing (DAS); total plant height; dry mass of plant shoot at 90 DAS, in vitro digestibility of organic matter at 90 DAS; the relationship of leaf area/ leaf and leaf area/ plant at 90 DAS. All parameters obtained a significant effect for the levels of organo-mineral fertilizer, independent of organic source, except to number of leaves and stem diameter. However, the relationship between the two organic sources was not significant just to plant height at 60 DAS. Interaction between fertilizer levels and organic source occurred to plant height at 90 DAS, dry mass per plant at 90 DAS and in vitro digestibility of organic matter. There was good adjustment in the quadratic regression equation for sorghum growth.

Organo-mineral fertilizers are an opportunity for technological innovation, since they allow the correct use of waste from several agroindustrial sectors, which is a global problem, to add value to the by-product generated, as prioritized in reverse logistics. In this sense, the objective of this work was to evaluate the effect of organic matter sources on the composition of organo-mineral fertilizers pelleted in relation to the exclusive use of mineral fertilizers in the cultivation of sorghum, and to verify the benefits of this fertilizer in the performance of the crop for the production of biofuel. The experiment was conducted at the Experimental Farm of the Federal Institute of the Triângulo Mineiro, located in the city of Campina Verde, State of Minas Gerais, Brazil. The experimental design was a randomized block design with four replicates in the factorial scheme 3 x 2 + 2, corresponding to three levels of fertilization with pelleted organomineral fertilizer (70, 100 and 160% based on the recommended dose of phosphorus) and two sources of organic matter in the composition of organo-mineral fertilizers (sewage sludge and filter cake), as well as two additional treatments (without fertilization and exclusively mineral fertilization). The evaluations were: plant height, leaf number and stem diameter at 30, 60 and 90 days after sowing (DAS); total plant height; dry mass of aerial part per plant and per hectare at 90 DAS; in vitro digestibility of organic matter at 90 DAS; the relationship of leaf area per leaf and leaf area per plant at 90 DAS. The plant height variables at 30, 60 and 90 DAS and total plant height had a significant effect between levels of organo-mineral fertilizers and among the additional treatments. Only height at 90 DAS and total plant height had a significant effect among organic sources. There was interaction between levels of fertilization with organomineral fertilizers and organic sources for plant height at 60 and 90 DAS, and for the total height of plants. Plant height at 30, 60 and 90 DAS, total plant height and in vitro digestibility showed quadratic effect for filter cake and sewage sludge. Sewage sludge and filter cake, used as an organic source for organo-mineral fertilizer production can be a great economic and environmental strategy for farmers and agribusiness, and for substitution to exclusively mineral fertilization.