2026-04-18T07:57:37Zhttps://recercat.cat/oai/request

oai:recercat.cat:10459.1/4651252025-09-15T19:01:17Zcom_2072_3622col_2072_479130

00925njm 22002777a 4500 dc Jiménez de Santiago, Diana Elisa author Ovejero, Jonatan author Antúnez Pujol, Montserrat author Bosch Serra, Àngela D. author 2023 Slurries are one of the main NH3 emission sources. Nitrogen losses impact air quality, and they constrain the sustainability of farming activities. In a rainfed Mediterranean agricultural system, the aim was to quantify NH3 emissions at a time when plants do not yet cover the soil surface and according to fertilization practices. One treatment was slurry from fattening pigs (PSF) applied before cereal sowing and incorporated into the soil; two treatments were PSF or from sows (PSS) applied at the cereal tillering stage (topdressing); and two more treatments received slurries twice, before sowing and as topdressing. Ammonia emissions were quantified with semi-static chambers during 145 h (before sowing) and 576 h (at cereal tillering) after slurry application. Before sowing, tillage after slurry application controlled NH3-N emissions, but they accounted for 14% of the total NH4-N applied. At tillering, average NH3-N emissions also accounted for ca. 14% of total NH4-N applied as PSF or PSS, respectively. Slurry dry matter from 84 kg m-3 (PSS) up to 127 kg m-3 (PSF), combined with low soil moisture content (below 30% of water holding capacity) at application time, helped in NH3 emission control. Slurry applications before sowing did not enhance later NH3-N emissions at topdressing. Spanish Ministry of Economy and Competitiveness and the Spanish National Institute for Agricultural Research and Experimentation (MINECO-INIA) through the projects RTA2013-57-C5-5 and RTA2017-88-C3-3. D.E.J.-d.-S. also acknowledges the JADE-Plus scholarship from the Bank of Santander-University of Lleida for PhD studies. Ammonia emission rate Fattening pig slurry Precursor of particulate matter Sow slurry Ammonia volatilization from pig slurries in a semiarid agricultural rainfed area