Izargi Vega-Mas

Abstract Fertilizer type plays a critical role in nitrogen (N) cycling, influencing nitrous oxide (N2O) emissions, soil mineral N dynamics, and microbial communities. Understanding these interactions is essential for developing sustainable fertilization strategies that balance agricultural productivity with environmental protection.

INTRODUCTION To meet the increasing global demand for food, the application of large amounts of nitrogen (N) fertilizers in agricultural systems is required.1 Urea is one of the most widely used N-fertilizers2 as a result of its high N content (46%), low cost per N unit, availability in most markets, low corrosion capacity and compatibility with most others fertilizers.3, 4 Nevertheless, because of its high water solubility and hydrolysis rate, part of the mineral N generated from urea is...

Abstract Proper carbon (C) supply is essential for nitrogen (N) assimilation especially when plants are grown under ammonium (NH4+) nutrition. However, how C and N metabolic fluxes adapt to achieve so remains uncertain. In this work, roots of wheat (Triticum aestivum L.) plants grown under exclusive NH4+ or nitrate (NO3−) supply were incubated with isotope-labelled substrates (15NH4+, 15NO3−, or [13C]Pyruvate) to follow the incorporation of 15N or 13C into amino acids and organic acids.