Efeito da época de colheita no crescimento vegetativo, na produtividade e na qualidade de raízes de três cultivares de mandioca

摘要: With the objective of determining effect harvesting time in vegetative growth, yield and quality storage roots three cassava cultivars (Manihot esculenta Crantz), an experiment was carried out area red distrophic Red Latosol Araruna, Northwest Parana state, from October, 1997 to May, 1999. The experimental design a randomized complete blocks with four replications treatments arranged split plots. main were Mico, IAC 13 14 secondary ten monthly harvests starting second plant growing season. canopy observed season, presented increase 50.0%. good development structure plants resulted greater accumulation reserve material roots, increasing its yield. highest harvest indices 19 21 months, mean values superior 54.0%. not significantly different production tuberous dry matter starch. phase physiologic rest showed be more favourable for harvesting, expressed terms (92.5%), (125.0%) starch (144.0%).