Arbuscular mycorrhizal fungi inoculation for coffee seedling production with commercial and conventional substrates

Coffee seedlings are commonly produced on substrate composed of a mixture soil and cattle manure, supplemented with chemical fertilizers. Alternatives to reduce production costs produce greater quality health include the use commercial organic substrates, which require less handling. The beneficial microorganisms such as arbuscular mycorrhizal fungi (AMF) can be considered good alternative for more vigorous coffee seedlings. main goal this study was evaluate effect inoculation AMF isolates development in (based coconut fiber) conventional (mixture manure compost). Ten were tested: Rhizophagus irregularis, Glomus macrocarpum, Claroideoglomus etunicatum, clarus, spp., Gigaspora margarita, Acaulospora morrowiae, scrobiculata, Dentiscutata heterogamma. Plant growth, shoot P content, colonization, extraradical mycelium length, phosphatase activity, photosynthetic pigments evaluated. effects mycorrhization depended both inoculated fungal species seedling cultivation. Inoculation G. spp. conferred best growth plant responses, increasing biomass by 160 320%. In substrate, most efficient R. spp, A. morrowiae up 149% increase. some highly replace substrate. These results open new opportunities an inoculant improve substrates.