Influence of management on maintenance and dynamics of carbon in the soil
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.001.0002Keywords:
Conservation management, No-tillage, Soil organic matterAbstract
This work aimed to analyze the dynamics of soil carbon in agricultural areas under different soil management systems and natural ecosystems with Cerrado vegetation. The study was carried out in a grain production area equivalent to soybeans and corn located in the Western region of Bahia State with the adoption of conventional and no-tillage + Brachiaria and vegetable production in the southernmost tip of Piauí State under organic cultivation and vegetable cultivation + no-tillage, besides the native area of the Cerrado. Total organic C content, light organic matter, and soil organic matter were evaluated. Furthermore, the C stock and light organic matter were assessed at four depths (0.0-0.05, 0.05-0.10, 0.10-0, 20, and 0.20-0.40 m). The systems under vegetable cultivation and native area presented the highest levels of C, organic matter, and soil carbon stocks in the superficial layers. However, the NTS + B2 showed higher levels in depth, except for light organic matter. Thus, the content, dynamics, and maintenance of C into the soil are nearly influenced by the management system adopted, both for the lighter fractions of organic matter and the more mineralized forms such as TOC, OSM, and StkC.
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