Arbuscular mycorrhizal fungi in degraded lands in Northeast Brazil

2012 
The arbuscular mycorrhizal (AM) fungi status of degraded lands in Northeast Brazil was surveyed. The survey was conducted out at the following four sites: native vegetation (NV), moderately degraded land (LDL), highly degraded land (HDL) and land under restoration for four years (RL). At each site, soil samples were collected at 0 to 20 cm depth during September 2010. We analyzed the correlation between spores and chemical attributes. AM fungi species were identified based on spore morphological characteristics and the AM diversity (Shannon-Wiener, Simpson, Pielou's evenness, and Margalef) and similarity (Sorensen and Morisita) indices were estimated. The organic matter content of the soil is positively correlated with the spores viable and nonviable total. The value of the ShannonWiener index was lowest in HDL showing an indication of changes in AM fungi diversity. In RL, sowing of legumes and grasses in this site promoted an increase in AM fungi richness of species suggesting a recovery in soil status after soil restoration.
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