Cruz, Lised Guaca  Bastidas, Amara Tatiana Contreras  Suárez, Leonardo Rodríguez  Salazar, Juan Carlos Suárez  <br/><br/>
Microbial Properties of Soil in Different Coverages in the Colombian Amazon 

<br/><br/> Publicação on-line; 39 ref.; 3 tables; 2 illus.; Summary (En) 
<br/><br/> <br/><br/>ABSTRACT<br/><br/>Changes in coverage affect the activity of soil’s microbial communities, affecting the carbon and<br/>nitrogen cycle. The variability of biochemical properties in different coverages (native forest, forest<br/>plantation, silvopastoral system and pasture) located in the northwest of the Colombian Amazon<br/>was evaluated. Edaphic properties were determined as: organic carbon (OC), total nitrogen (TN),<br/>microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) using the fumigation<br/>method. A significant effect was found to land use × depth interaction for the variables moisture,<br/>pH, CO and MBC/OC ratio (p < 0.05), while MBC and dCO2<br/> showed differences only for land<br/>use and NT, MBN and MBN/TN ratio at depth (p < 0.05). In general, when modifying the soil<br/>cover, changes were made in the chemical properties that affected the microbial activity.<br/><br/>Keywords: fumigation, CO2 emissions, multivariate analysis, structural equations modeling. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>FUMIGAÇÃO<br/>DIÓXIDO DE CARBONO<br/>CARBONO<br/>MÉTODO ESTATÍSTICO<br/>MICROBIOLOGIA DO SOLO