YIELD AND MINERAL COMPOSITION OF CARROTS FERTILIZAED WITH ORGANIC RESIDUESThe present study was undertaken to evaluate the plant nutritional status the root quality and yield of carrots, cv. Brasília, influenced by the following treatments: seven types of organic compounds which were produced from liquid swine manure and straw-materials, that is, crushed-sugar-cane, napier grass and coffee straw and the crushed-sugar-cane with or without gypsum or superphosphate triple; one with dry swine manure; one with chemical fertilization, and a untreated control. The experiment was carried out under field conditions using a randomized block design with four replications, from May 3 to August 23, 1994, at EPAMIG Experimental Estation in Ponte Nova county, Minas Gerais State, Brazil. Generally, both a greater plant height and aerial part yield were obtained from treatments with organic compounds and dry swine manure. The organic compounds produced from coffee straw plus liquid swine manure, crushed-sugar-cane plus superphosphate triple and napier grass plus liquid swine manure provided yields of total roots over than 50 t.ha-1. The organic compound produced form coffee straw and liquid swine manure provided a greater yield of total and commercial roots. Enrichment of the organic compound crushed-sugar-cane plus liquid swine manure with gypsum or superphosphate triple did not affect root yield, neither Ca and P contents in leaves and roots. The carrot roots that received organic or mineral fertilization presented superior P and K contents and similar Ca content, when compared to those contents considered as standard for elaborating human diets.
carrots; nutrition; suine manure; organic fertilization; mineral fertilization
