SPATIAL ANALYSIS OF MERCURY LEVELS AS INDICATOR OF ENVIRONMENTAL CHANGES AND SOIL QUALITY IN AGROFORESTRY SYSTEMS IN SOUTHERN AMAZON
DOI:
https://doi.org/10.14393/RCG207145352Keywords:
Land use., Heavy metal., Spatial analysis., Soil quality.Abstract
An agroforestry system (AFS) describes the conjoint use of land for agricultural and
forestry purposes. An AFS plays a strategic role in the mitigation of carbon dioxide
(CO2) emissions, and stands as an alternative in land use that reduces mercury (Hg)
remobilization in cultivated soils. This study evaluated the spatial variability of Hg
concentrations as indicators of environment changes and soil quality in different land
cover and use systems in a rural settlement in southern Amazon, Brazil. The
methodological procedures were carried out as steps: the experimental units were
defined, physical and chemical characteristics of soil samples were analyzed, and
data were evaluated using conventional and spatial statistics. The AFS included had
been established 10 years before or more, and had high Hg retention capacity ,
compared with Hg levels in soils on migratory agriculture or that are not fallowed .
Therefore, due to low AFS improve soil quality due to the low intensity of harrowing,
increasing retention of gaseous and particulate Hg in the soil.
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