O objetivo deste trabalho foi conhecer a produtividade agroeconômica do mangarito 'Comum', propagado com cinco tipos de mudas (Extra, Grande, Médio, Pequeno e Muito pequeno), cultivado sem e com amontoa, em três anos agrícolas. Os tratamentos foram arranjados como fatorial 5 x 2 no delineamento experimental de blocos casualizados, com quatro repetições, em cada ano. As colheitas foram realizadas aos 238 (2007-08), 231 (2008-09) e 237 (2009-10) dias após o plantio. Os dados foram submetidos à análise de variância em cada ano. A maior massa fresca de folhas foi das plantas provenientes de mudas Grande e as dos rizoma-mãe-RM, rizoma-filho comercial-RFC e a massa seca de rizoma-filho não-comercial-RFNC foram maiores nas do tipo Extra. As plantas cultivadas em 2008-2009 produziram mais massa fresca de RM e de RFNC que as de 2009-10. As produtividades de massa seca de folhas, RM e RFC; os comprimentos de RM e RFC e o diâmetro de RFC foram influenciados significativamente pela interação tipos de mudas e anos agrícolas. Pela análise econômica, foi melhor cultivar o mangarito sem amontoa e propagado usando mudas do tipo Extra, obtendo-se renda líquida de R$ 2.234,08.
This study aims to discover the agro-economic yield of the 'Comum' tannia, which was propagated with five seedling types (Extra, Large, Medium, Small and Tiny) and grown both with and without a hilling operation during three crop seasons. In each agricultural year, the treatments were arranged as a 5 x 2 factorial in a randomized complete block design with four replications. The harvests were conducted 238 (2007-08), 231 (2008-09) and 237 (2009-10) days after planting. The data were submitted to an analysis of variance each year. The plants produced from large seedlings and RM-corms had a higher fresh leaf weight. Additionally, the dry weight of the RFC-commercial cormels and RFNC-non-commercial cormels was higher with extra seedlings. The plants grown during 2008-2009 had a higher fresh weight of RM and of RFNC than the plants grown during 2009-10. The interaction between the seedling types and crop seasons significantly influence the yield and dry weight of the leaves of RM and RFC, the leaf length of RM and RFC and the leaf diameter of RFC. According to the economic analysis, a net income of R$ 2,234.08 was obtained when the tannia were cultivated without a hilling operation using extra propagated seedlings.