Plateforme de connaissances sur l'agriculture familiale

Arbuscular mycorrhizal fungi in familiar farmers areas at Água Boa 2 Community, Rio Pardo de Minas (MG)

Symbiotic relationships and agricultural practices that reduce external inputs dependency and make feasible familiar farming systems production are necessary and demand differentiated soil, plants and inputs management. Arbuscular mycorrhizal fungi (FMAs) are naturally widespread in soils, being agricultural systems components, infecting and colonising roots of most plants, contributing for their growth, mainly in low fertility soils. Representative soils from several farms in the community Água Boa 2 in Rio Pardo de Minas (MG) were characterized by arbuscular mycorrhizal fungi (AMF) occurrence at the rhizosphere zone of the main plant species cultivated. Each sample was formed   by 4 sub‑samples, where was evaluated spores  number  in  50  g  of  soil, extracted by wet sieving method, with further counting and genera identification. The same areas were sampled to chemical and texture analysis. The genera Glomus, Acaulospora, Gigaspora and Scutellospora occurred in all areas, with dominance of Glomus and Acaulospora.

FMAs population was related with host plant species and soil fertility conditions, being determined by the more mycotrophic plant species and low nutrient status of soils. Mixed cropping, row intercropping or crop sequences that involved pigeon pea, cassava, maize and common bean were the most suitable conditions to FMAs   occurrence.

Title of publication: Boletim de pesquisa e desenvolvimento
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ISSN: 1676 - 918X
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Auteur: Sueli Gomes Fernandes
Autres autheurs: Cynthia Torres de Toledo, Machado Valter Lopes, Marina de Fátima Vilela, Luiz Arnaldo Fernandes
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Année: 2010
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Pays: Brazil
Couverture géographique: Amérique latine et les Caraïbes
Type: Article de revue spécialisée
Langue: Portuguese
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