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| Schiavo,Jolimar Antonio; Busato,Jader Galba; Martins,Marco Antonio; Canellas,Luciano Pasqualoto. |
| Humidified fractions of organic matter and soil microorganism populations are used as environmental quality indicators. This work aimed to study the changes in chemical and microbiological soil attributes, as well as in the humidified fractions, of the organic matter in a substrate from a clay extraction area cropped with Brachiaria mutica, Acacia mangium and Eucalyptus. In the Eucalyptus area, the P contents increased linearly with planting time. However, only at the twelfth year, differences between Eucalyptus and B. mutica areas have occurred. In the A. mangium area, such differences in the P content occurred at the third year with increment of 43%, at the 0-10 cm layer, in relation to B. mutica. Also, at the 0-10 cm layer, the total carbon contents... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arborous legumes; Mycorrhizas; Rhizobium; Humic substances; Soil micro biota. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300010 |
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| Mercado,Maria I; Coll Aráoz,Maria V; Brandán De Weht,Celia I; Ponessa,Graciela I; Grau,Alfredo. |
| Mycorrhizal associations in Smallanthus sonchifolius (Poepp. & Endl.) H. Robinson (Asteraceae), Yacon, an ancient Andean crop and Smallanthus macroscyphus (Baker ex Martius) A. Grau, wild yacon, a close wild relative are described for the frst time. Yacon fbrous roots growing under feld conditions have high levels of colonization by arbuscular mycorrhizal fungi (86 %). Other fungi colonizing roots included dark septate endophytes (45 %) and unidentifed fungi that are probably saprophytic (25 %) were observed. Only 9% of the samples analyzed were not colonized by any type of fungi. Glomus, Acaulospora, Scutellospora, Gigaspora and Pacispora were the main genera of arbuscular mycorrhiza identifed. A similar high degree of mycorrhizal colonization was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Smallanthus sonchifolius; Smallanthus macroscyphus; Mycorrhizas; Arbuscular mycorrhizas; Dark septate endophytes. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722013000200002 |
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