Study of Circular Economy Applied to Sustainable Agriculture: Analysis of Protein and Oil Content in Sunflower and Maize Crops

All nitrogen fertilizers require ammonia as the main raw material and source of nitrogen, therefore, per ton of fertilizer produced, there are also tons of CO2 emitted into the atmosphere at the rate of 1:1. Agriculture is responsible for 92% of ammonia emissions into the atmosphere, and is therefore a potential source of atmospheric pollution. Sustainable agriculture will be that agriculture whose practices based on 4R: Right source, right place, right rate and right time. The aim of this paper is to analyzes the effect of DMPP, NBPT and NPPT nitrification and urease inhibitors in sunflower and maize in plots L1 and L2. In both plots a stable germination was observed thanks to the effects of zinc oxide (ZnO) in the flowering stages, favoring the absorption of secondary nutrients such as calcium oxide (CaO), magnesium oxide (MgO), and sulfur trioxide specie (SO3-). These inhibitors are a good alternative for sustainable agriculture, since they prevent nitrogen losses in the atmosphere in the form of ammonia, favoring the availability of nutrients for better plant absorption. The results obtained by both the physical-chemical analysis and the statistical evaluation t-test, show that for sunflower, a high amount of proteins is observed in L1 which is around 5.86% and the oil content 1.7%. As far as corn is concerned, higher protein content is recorded in L1 versus L2 and according to the statistical results it is also observed that the mean of both plots differs, L1 is still positioned in first place with ~2.4% protein.