Phosphorus in soils of composting areas in the municipality of Florianópolis-SC

Abstract

Composting is an important tool for organic waste treatment and reuse. However, composting
without taking into account the leachate generated by the litter that reaches the soil can cause
soil contamination by P and consequently cause eutrophication of water sources. The aim of
this study was to evaluate the change in P content available in soil in areas used to compost
litter in Florianópolis/SC. Four areas were selected, two in which composting is done and two
reference. Soil was collected in layers 0-5, 5-10, 10-20, 20-30, 30- 40 cm deep. The soil was
dried, ground and subjected to P extraction available. It was observed the increase of available
P content in the soil in all the composting areas compared its references, thus, we need measures
that prevent the arrival of leachate to the soil and avoid the increase of P levels.