A research of UPM and UPV has shown that the inclusion of agroindustrial by-products in pig feed can reduce the nitrous oxide emissions (N2O) of the slurry used as manures up to 65%.
The aim of this study carried out by UPM researchers with the collaboration of Institute for Animal Science and Technology of UPV was to influence the ingredients of pig diet to modify the composition of slurry used as manures and to assess the possible variations on N2O emissions.
A research of UPM and UPV has shown that the inclusion of agroindustrial by-products in pig feed can reduce the nitrous oxide emissions (N2O) of the slurry used as manures up to 65%.
The aim of this study carried out by UPM researchers with the collaboration of Institute for Animal Science and Technology of UPV was to influence the ingredients of pig diet to modify the composition of slurry used as manures and to assess the possible variations on N2O emissions.
According to the results, soils amended with slurries obtained from modified diets (with orange pulp and carob) decreased N2O emissions by 65 and 47%, respectively, compared with slurries obtained through a conventional pig diet. These results show the potential of alternative strategies of animal feeding to reduce the environmental issues associated with agriculture.
Nitrogen fertilizers, organic or mineral, are responsible for most of the N2O emissions from agricultural activity. This gas has a heating potential 300 times higher than CO2, this is the reason why it is essential to develop mitigation strategies. N2O emissions are mainly caused by microbiological processes known as nitrification and denitrification. When a nitrogen fertilizer is added to the soil, it increases its microbiological activity by activating both processes that at the same time they depend on factors such as such as climatic, edaphic and field management.
Read more at Technical University of Madrid (UPM)
Image: Pigs eating feeds with dehydrated citrus pulp and N2O emissions released by the use of the obtained slurries. (CoPIG project, AGL2014-56653).
Credit: Sánchez-Martín et al., 2017
