Carbon and nitrogen of the granulometric fractions in aggregates of Argissolo with 10 years of application of swine manure

Abstract

Waste applications is an alternative to the use of soil soluble fertilizers. Organic matter and
aggregation are indicators that show differences in diverse soil use conditions. The objective
was to evaluate the effects of the use of waste on the total carbon and nitrogen contents and
the granulometric fractions of the aggregates in an Argisol with a history of applications of
swine manure in no - tillage system, without the use of agrochemicals. The treatments were
control; pig slurry (PS) and deep litter (DL) once and twice the recommended nitrogen for corn
and oats. The aggregates were separated according to the formation pathway (biogenic and
physicogenic) and in these quantified the total organic carbon (TOC) and nitrogen (NT) contents
and of the granulometric fractions. The application of DL increased the TOC and NT of
the aggregates and fractions. Application of DL and PS increased C and N in biogenic aggregates
as compared to physicogenic ones.