Desinfestação de substratos e fungos micorrízicos na produção de porta-enxertos de citros / Substrates and mycorrhizal fungi in the production of citrus rootstocks

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

2012

RESUMO

The Brazilian citrus industry is one of the most competitive sectors of the agribusiness world, however, the production sector of citrus seedlings has several limitations. The citrus production rootstocks lacks quality of substrates, options for diversification of rootstock varieties and plants well-formed in a short time to reach success of the orchard. The objective was evaluate the development of citrus rootstocks grown on different substrates, submitted or not to disinfection and mycorrhizal fungi. There were developed two studies: first, checking the development of six rootstocks ( Sunki mandarin, citrumelo, citrange ¿Fepagro C 37 , Flying Dragon lemon Volkameriano¿ and Poncirus trifoliata) in two commercial substrates and the second, comprising 3 experiments that evaluated two rootstock varieties ( Sunki mandarin and ¿Fepagro citrange C 37 ) growned in two commercial substrates (called Commercial 1 and 2) subjected or not to disinfestation and mycorrhizal inoculation (experiments 1 and 2 was used Scutellospora heterogama and in experiment 3 was inoculated Glomus etunicatum, Gigaspora margarita and S. heterogama). We have evaluated the seedling emergence and vegetative development throughout the experiment, besides the mycorrhizal colonization at each stage of growth. The substrate Commercial 1, in general, provided faster emergence of varieties rootstock. The substrates 1 and Commercial 2, autoclaved and handled properly, provided satisfactory development of the plants, being recommended for citrus. High levels of soluble salts (TTSS (gL-1) of the substrates may hinder seedling emergence. P. trifoliata was little vigorous, lemon trees Volkameriano was highly vigorous, the citrumelo and Sunki mandarin showed an intermediary effect. The sterilization of the substrate was essential for the good plant growth.

ASSUNTO(S)

fruta cítrica porta-enxerto substrato fungo micorriza propagação vegetativa

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