Avaliação preliminar do efeito de compostos orgânicos na produtividade de milho (Zea mays L.) e feijão (Phaseolus vulgaris L.).

Abstract

Four organic composts produced in recycling plants in Paraíba State (Brazil) were characterized and their fertilized effect on Phaseolus vulgaris L. and Zea mays L was studied. The compost from Princesa Isabel presented higher organic carbon concentrations (24.2g/dm3), organic matter (41.6g/dm3), phosphorus (7.47mg/dm3), calcium (13.5cmol/dm3) and magnesium (9.20mg/dm3); those from Guarabira had higher values of nitrogen (28.44g/kg) and potassium (8.60cmol/dm3); Esperança compost yielded the highest productivity (P.vulgaris PA/R 84,4% higher than controls and 20,8% for Zea mays).The fecal contamination was high (104-105 FC/100 ml) suggesting carefull handling of composts.