Short-term effects of ammonium nitrogen in upland pasture soil affected or not affected by cattle

0371279 - BC 2012 RIV NL eng J - Journal Article
Hynšt, Jaroslav - Šimek, Miloslav
Short-term effects of ammonium nitrogen in upland pasture soil affected or not affected by cattle.
Biology and Fertility of Soils. Roč. 48, č. 1 (2012), s. 43-49. ISSN 0178-2762. E-ISSN 1432-0789
R&D Projects: GA ČR GA526/04/0325; GA MŠMT LC06066; GA AV ČR IAA600660605
Institutional research plan: CEZ:AV0Z60660521
Keywords : ammonium * nitrification * nitrite
Subject RIV: EH - Ecology, Behaviour
Impact factor: 2.505, year: 2012

The short-term effects of excessive NH₄⁺-N on selected characteristics of soil unaffected (low annual N inputs) and affected (high annual N inputs) by cattle were investigated under laboratory conditions. The major hypothesis tested was that above a theoretical upper limit of NH₄⁺ concentration, an excess of NH₄⁺-N does not further increase NO₃^- formation rate in the soil, but only supports accumulation of NO₂^--N and gaseous losses of N as N₂O. Soils were amended with 10 to 500 μg NH₄⁺-N g^-1 soil. In both soils, addition of NH₄⁺-N increased production of NO₃^--N until some limit. This limit was higher in cattle-affected soil than in unaffected soil. Production of N₂O increased in the whole range of amendments in both soils.
Permanent Link: http://hdl.handle.net/11104/0204829