Evaluation of GHG emissions by sugarcane crop fertilization, from a focus on system dynamics

Abstract

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.