RESUMOA utilização do lodo de esgoto na agricultura como adubo orgânico, é tida hoje, como a alternativa mais promissora para disposição final deste resíduo, em razão da sua sustentabilidade. O objetivo deste trabalho foi avaliar a produção de mudas de pinhão manso (Jatropha curcas L.), a partir de substratos contendo esterco bovino e diferentes concentrações de biossólido, como fontes de matéria orgânica e de nutrientes e o tratamento das sementes com fungicida. As sementes tratadas receberam o fungicida Moncerem ® PM. Todos os tubetes continham 40% de esterco bovino e as doses de biossólido foram crescentes (0, 10, 20, 30 e 40%), complementados com vermiculita. Foram avaliados: emergência aos 14 dias, altura de planta, diâmetro de caule, peso seco da parte aérea e de raiz e acúmulo dos metais pesados Cd, Cr, Pb e Ni. O tratamento de sementes teve efeito negativo na emergência aos 14 dias e, consequentemente, prejudicou o posterior crescimento das plantas. De maneira geral, a adição de até 10% de biossólido ao substrato apresentou os melhores resultados de crescimento da muda. Com relação aos metais pesados apenas o níquel foi acumulado crescentemente na planta, à medida em que se aumentaram as doses de biossólido no substrato. Palavras-chave: óleo, Jatropha curcas L., sustentabilidadeBiosolid as substrate for production of physic nut seedlings ABSTRACT The use of sewage sludge in agriculture as an organic fertilizer nowadays is the most promising alternative for final disposal of this residue due to its sustainability. The objective of this work was to evaluate production of physic nut (Jatropha curcas L.) seedlings using a substrate containing cattle manure and different concentrations of biosolid, as sources of organic matter and nutrients and the treatment of the seeds with fungicide. The treated seeds received the fungicide Moncerem® PM. All the polytubes contained 40% of cattle manure and the biosolid doses were 0, 10, 20, 30 and 40%, complemented with vermiculite. The variables evaluated were: emergence on the 14 th day, plant height, stem diameter, dry weight of the aerial parts and root and the accumulation of the heavy metals Cd, Cr, Pb and Ni. The seed treatment had a negative effect on the emergence on the 14 th day and consequently harmed the subsequent plant growth. Generally, the substrate containing 10% of biosolid presented the best results of seedling growth. Regarding the heavy metals, only Ni was increasingly accumulated in the plant, as the biosolid doses increased in the substrate.
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