Strategies to mitigate N2O emissions and improve crop quality. Effect of Zn-N co-fertilization and N-enhanced efficiency fertilizers on microbial communities

Abstract

XLV Sustainable agriculture aims to increase food production, in the context of a growing worldwide population, without compromising crop quality and yield whilst reducing environmental pollution. Most agricultural practices rely on external nitrogen (N) inputs, however, this N can be lost (e.g., through the release of the nitrous oxide (N2O) gas to the atmosphere) due to the activity of microbial communities that are involved in the N-cycle. New practices, therefore, need to be implemented in order to mitigate these N2O comparison with CAN. The inhibitor-based treatments led to a significant reduction of total N 2 O fluxes following a rewetting pulse, with respect to those of U or CAN. With regards to the N-cycling genes, the abundances of nitrifier and denitrifier communities, especially AOB, significantly decreased with the application of inhibitors with respect to the U or CAN treatments. From an agronomic point of view, CAN+DMPSA offers a further potential advantage related to crop quality: an increase in the oil yield. .

Nitrite-Oxidizing Bacterial Strains Isolated from Soils of Andean Ecosystems and Their Potential Use in Nitrogen Reduction

“…In general, the biological processes, particularly those from the nitrification metabolism, are affected by temperature, salinity, light, OM concentration, substrate concentration (ammonia or nitrite), pH, and oxygen concentration. In addition, the oxygen concentration in aquatic habitats, between the subsurface water, the sediments, and the soil, is a significant variable for microbial activity regulation and the distribution of nitrogen cycling [10].…”