Abstract

RESUMO Este estudo foi conduzido para averiguar o uso de substratos orgânicos na produção de mudas nativas do Cerrado brasileiro. O objetivo foi avaliar os parâmetros biométricos, nutrição e qualidade de mudas de guapeva (Pouteria gardneriana) produzidas em substratos contendo diferentes fontes de matéria orgânica. Utilizaram-se os seguintes componentes para a formulação dos substratos: subsolo (SB), casca de arroz (RH), composto de esterco bovino [CC (silagem de milho + esterco bovino)], esterco bovino (CM), bagaço de cana (CB), torta de filtro de cana (FC) e BioPlant (BP). Cinco substratos foram formulados utilizando proporções em base de volume, como segue: SB+RH (1:1, v/v), SB+CC (1:1, v/v), SB+CM (3:1, v/v), CB+FC (3:2, v/v) e BP. Avaliou-se o comprimento do caule, o diâmetro do colo radicular, o peso seco da raiz, o peso seco da parte aérea, a nutrição e o índice de qualidade Dickson. A utilização do CM como fonte de matéria orgânica proporcionou, em geral, os melhores resultados para as características biométricas e a produção de matéria seca. O uso de matéria orgânica nos substratos SB+CM (3:1, v/v) e SB+CC (1:1, v/v) melhorou a qualidade do solo e favoreceu o crescimento e qualidade das mudas de guapeva, e podem ser indicados como substratos alternativos.

Highlights

  • The Brazilian Savanna (Cerrado) is the second largest Brazilian biome

  • The emergence of guapeva seedlings was higher in the BP (BioPlant ) substrate than in the subsoil material (SB)+CC substrate, with values of 89 and 59%, respectively (Table 2)

  • The emergences in the substrates SB+rice husk (RH) and CB+filter cake (FC) did not differ from those in the other formulations but gave percentages above 85%, which can be considered satisfactory because this species is not yet domesticated

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Summary

Introduction

Numerous fruit species of the Cerrado have fruits with unique flavors, food potential, pharmacological potential and nutraceutical properties (BOLETI et al, 2008; SILVA et al, 2009; LIMA et al, 2010). Many species of native fruit are known and used by the traditional population living in the Cerrado. Native fruits species are mainly exploited an extractive form. Cerrado soils are originally acid and saturated by Al (HARIDASAN, 2000), which may have promoted evolution of native species, adapting to the low pH. These characteristics may not result in highquality seedlings (SOUSA et al, 2007)

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