Nitrogen Loss by Ammonia Volatilization in Cultivation of ? Olive Orchards Fertilized with Compost

ABASCAL SERGIO; BUSCHIAZZO, D. E.; MIELNIK, L; ASENSIO, C.

EURASIAN SOIL SCIENCE

MAIK NAUKA/INTERPERIODICA/SPRINGER

Lugar: Kiev; Año: 2019 vol. 52 p. 1207 - 1213

1064-2293

This study concentrated on drip-irrigated olive trees on Calcisols, Cambisols, and Luvisols. The olive trees were fertilized with compost spread in bands about 30 cm from each tree line and incorporated with a subsoiler. The volatilization of NH3 was quantified using a semi-open static system, with polyurethane discs impregnated with 1N H2SO4. The accumulated loss of NH3 was calculated by adding up the daily flow of NH3 during the 10-day measurement period and comparing it to a control treatment. The total nitrogen vol- atilized during the study period varied with the type of soil, and was highest in the 2018 campaign, with 2.24, 2.05 and 1.66 kg ha?1 in Calcisols, Cambisols, and Luvisols, respectively, representing losses of 3.50, 3.20, and 2.59% of the total N incorporated. Variables with a significant effect on volatilization were rainfall, potential evaporation (closely related to temperature) and soil type, with higher significance in Luvisols.