Respostas de Acacia mangium Willd e Sclerolobium paniculatum Vogel a fungos micorrízicos arbusculares nativos provenientes de áreas degradadas pela mineração de bauxita na Amazônia Responses of Acacia mangium Willd and Sclerolobium paniculatum Vogel to native arbuscular mycorrhizal fungi from remaining areas of bauxite mining in Amazon
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Abstract
The responses of Acacia mangium Willd (mangium) and Sclerolobium paniculatum Vogel (tachi) to arbuscular mycorrhizal fungi (AMF) inoculation collected from areas under reclamation after bauxite mining, was evaluated in an completely randomized design distributed in 14 treatments (two legume, species and seven soil types), with three replicates. Evaluated were the number of spores in the soil, the mycorrhizal colonization, the total dry matter, accumulated P, the mycorrhizal dependence of the seedlings and the abundance and the frequency of species. The number of infective propagules (NIP) was studied in a randomized block design, with eight dilutions of soil inoculum, five replicates and a trap plant (Brachiaria decumbens Stapf). Substratum of a Planosol, mixed with washed sand (1:1 v:v), and phosphate of rock Araxá (0.60 g/kg) was used. The number of spores increased in function of time covering of legumes. The mycorrhizal colonization was more intense in tachi. The values of dry matter of that species were inferior to the mangium, that extracted six times larger P of substratum. In general, mangium, contrary to tachi, was facultative to presence of AMF, suggesting the use in degraded areas without previous inoculation. Among the 39 species of identified AMF, Glomus macrocarpum Tul. & Tul. showed higher index of abundance and frequency (IAF) and higher NIP, standing among pioneering species, while others appeared only under more developed forest of the areas in reclamation.
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marinho2004respostasacta
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| Authors | Marinho, Ney Freitas;Caproni, Ana Lucy;Franco, Avílio Antônio;Berbara, Ricardo Luís Louro; |
| Journal | acta botânica brasílica |
| Year | 2004 |
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| Keywords | Keywords not found |
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