N.sub.2./sub.O emissions from low and moderately disturbed pasture soils - field tests of minimal and maximal N supply

0328567 - BC 2010 RIV NL eng J - Článek v odborném periodiku
Hynšt, Jaroslav - Šimek, Miloslav
N₂O emissions from low and moderately disturbed pasture soils - field tests of minimal and maximal N supply.
Plant and Soil. Roč. 320, 1-2 (2009), s. 195-207. ISSN 0032-079X. E-ISSN 1573-5036
Grant CEP: GA ČR GA526/04/0325; GA AV ČR IAA600660605; GA MŠMT LC06066
Výzkumný záměr: CEZ:AV0Z60660521
Klíčová slova: nitrogen fertilization * grassland * cattle disturbance level
Kód oboru RIV: EH - Ekologie - společenstva
Impakt faktor: 2.517, rok: 2009

Rates and patterns of nitrogen transformation differ in divergently managed pasture soils. In pastures with low nutrient inputs, N is utilized efficiently and it is assimilated by plants and soil microorganisms for synthesis of biomass. In more intensive pastures, characterized with higher N inputs, significant amounts of N can be lost from the ecosystem in various forms. Two soils of a cattle overwintering area with different levels of cattle disturbance were supplied with a solution of KNO₃ in various levels corresponding in range to 0-500 kg N ha^-1 Emissions of N₂O were measured during 24 h after a NO₃^--N application. We hypothesized that under a low disturbance small additions of up to 5 kg NO₃^--N are used by plants and soil microbes without an increase in N₂O emissions, while a pasture adapted to a moderate disturbance will increase N₂O emissions.
Trvalý link: http://hdl.handle.net/11104/0174857