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Relationships of soil microbial biomass with the chemical characteristics of organic and mineral soil fractions after mineral exploration in Eastern Brazilian Amazon

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Author(s): Maria de Lourdes Pinheiro Ruivo | Nairam Félix de Barros | Carlos Ernesto Gonçalves Reynaud SchaeferIII

Journal: Boletim do Museu Paraense Emílio Goeldi : Ciências Naturais
ISSN 1981-8114

Volume: 1;
Issue: 2;
Start page: 121;
Date: 2006;
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Keywords: Soil microbial biomass | Altered soils | Mining | Western Amazon

ABSTRACT
The studied area is located in Porto Trombetas, district of Oriximiná, in the northwest of Pará, state, Brazil and has been subject to bauxite mining. The chemical and biological measurements were made on sites recuperation from 1981 to 1994, and one in Yellow Latosol under secondary forest, taken as reference. The values corresponding to the chemical and biological characteristics were obtained from analyses of the litter layer, light organic matter and soil of the altered and unaltered sites. The data were analyzed using Pearson correlation and Path Analysis. The results given how the chemical an biological composition litter layer and light organic matter were related of the carbon and microbial biomass phosphorus concentration.
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