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The objective of this study was to analyze the effect of biosolid composts (BC) and carbonized rice hull (RH) on the production of Coffea arabica L. cv Catuaí Vermelho seedlings (IAC H 2077-2-5-99) grown in tubets. A totally randomized experimental design with five treatments and four replications was conducted in a nursery, to evaluate Co, Ni, Cr, Pb, Cu, Mn and Zn contents in roots, stems and leaves. Higher contents of Cr, Co, Ni, Pb, Cu and Zn were found in roots, while leaves carried the highest content of Mn. Zn in leaves went from average to high in plants developed in BC. In plants developed in RH. Mn content was about four times higher than the adequate concentration. Ni, Co, Cr, Pb and Cu contents found in leaves were considered normal, according to international standards. The best treatment for coffee seedling nutrition was 50% RH + 50% BC. Estudou-se o efeito do biossólido compostado (BC), da casca de arroz carbonizada (CA) e das misturas na produção de mudas de Coffea arabica L. cv Catuaí Vermelho, IAC-99, em tubetes. O experimento foi instalado em viveiro para avaliar os teores de Co, Ni, Cr, Pb, Cd, Cu, Mn e Zn na raiz, caule e folha. O delineamento experimental utilizado foi o inteiramente casualizado, com cinco tratamentos e quatro repetições. Os maiores teores de Cr, Co, Ni, Pb, Cu e Zn foram encontrados na raiz e o maior de Mn na folha. O teor de Zn na folha foi de adequado médio a adequado alto em plantas desenvolvidas em BC ou em suas misturas. Em plantas desenvolvidas em CA o teor de Mn foi superior cerca de quatro vezes a concentração considerada adequada. Os teores de Ni, Co, Cr, Pb e Cu verificados nas folhas podem ser considerados normais segundo padrões internacionais. O tratamento melhor para a nutrição do cafeeiro foi 50% de CA + 50% de BC

High metal contents in coffee plant organs developed in tubets with different proportions of biosolid composts and carbonized rice hulls