Content and stock of soil organic matter in agroecological production

Abstract

Soil is a natural resource essential to human survival, however, despite being a renewable
natural resource, its inapropriated use has caused environmental degradation. The aim of
this study was to evaluate content and stock of organic carbon in areas under different uses
in agro-ecological production systems in Bahia wild. The study was developed in Bocaiúva
Chacara, Feira de Santana - BA. Four production systems were selected, namely: area under
banana cultivation (BAN), Citrus (CIT), passion fruit (MAR) and pineapple (ABA). For comparison
it was also evaluated an area under native forest (MN). Soil samples were collected in four
repetitions the depths of 0.0 0.10, 0.10-0.20 and 0.20-0.40 m. Total organic carbon was obtained
by wet oxidation with an external source of heat. In general, it was observed that the replacement
of native vegetation by agricultural systems caused a decrease in content and organic
carbon stocks, with exception for SEA that there was no significant statistical difference in the
carbon content compared to MN. The results show that the replacement of native vegetation by
agricultural systems promoted decline of TOC content, except for the SEA system and in depth
organic carbon stocks were reduced, with except for the area under cultivation with pineapple.