Resumo

LOPEZ ASTUDILLO, Andrés et al. Evaluation of GHG emissions by sugarcane crop fertilization, from a focus on system dynamics. Ing. Desarro. [online]. 2018, vol.36, n.1, pp.3-17. ISSN 0122-3461.  https://doi.org/10.14482/inde.36.1.10936.

This paper stands the results for a systems dynamics model, which allows to evaluate the carbon footprint behavior from ureic and nitrogen fertilizers applications on sugarcane crop fields located at Valle del Cauca on a 5 years simulation. As a research methodology, both dynamics Nitrogen Cycle and the IPCC Guidelines were studied in order to estimate GHG emissions. The main result presented that transition and organic sugarcane crops have a lower level of GHG emissions than a commercial sugarcane crop, with a decrease of 71% and 36% respectively. Through Sensitivity Analysis, since fractional fertilization doses into two times, it is not possible to observe GHG emissions reduction on both medium and long terms. However, considering the suggested doses due to soil characteristics under study and the sugarcane crop cycle, significant levels of emissions reductions were obtained in commercial and organic crops, corresponding on average 21% (plant crop) and 32% (second ratoon crop). Finally, we conclude on the significance of adopting strategies for fertilization in order to increase productivity and to reduce environmental impact.

Palavras-chave : dynamic modeling; fertilization; GHG mitigation; nitrous oxide emissions; sugar-cane crop.

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