Original title: Dynamika emisí N2O po přídavku C a N do půdy na zimovišti skotu
Translated title: Dynamics of N2O emissions after C and N amendments of soil at the cattle overwintering area
Authors: Hynšt, Jaroslav ; Brůček, Petr ; Čuhel, Jiří ; Šimek, Miloslav
Document type: Papers
Conference/Event: Život v pode /6./, Praha (CZ), 2005-02-01 / 2005-02-02
Year: 2005
Language: cze
Abstract: [cze] [eng]
Po aplikaci dusíku v nitrátové formě a uhlíku ve formě glukózy do půdy zimoviště skotu došlo k intenzivnímu krátkodobému zvýšení produkce N2O. Celkové množství N2O uvolněné z půdy záviselo na množství dodaných živin a během 3 dnů měření dosahovalo 1-15 kg N.ha-1 (0,2-3% aplikovaného dusíku) při přídavku 10-1000 kg N a C.ha-1, což zhruba odpovídá odhadované roční produkci N2O z půdy neovlivněné přídavky. Emise N2O byly velmi heterogenní, což ilustrují velké rozdíly mezi jednotlivými komorami, a proměnlivé v čase. Průběh emisí souvisel s dobou měřění během dne a noci, a tedy velmi pravděpodobně s průběhem teplot vzduchu a svrchní vrstvy půdy; maximální emise byly však vždy změřeny 6 h po přídavku živin. Field experiments were carried out at the cattle overwintering area in South Bohemia, Czech Republic, focused on the emissions of N2O after soil amendments with nitrate and glucose. Emissions were estimated using a permanent static chamber technique. Nitrate and glucose amendments caused very sharp increases of N2O fluxes, which however diminished after 2-3 days. Total amount of N2O escaping the soil was related to the amount of N and C added, and was calculated to 1-15 kg N.ha-1 (0.2-3% of N applied). Emissions were heterogeneous, which is shown by great differences among the individual chambers. Emissions were variable in time and very probably were controlled by temperature, as they approximately followed the air and surface soil temperature patterns. Despite the timing of amendment application, peaks of emissions were always determined 6 hours after the amendments.
Keywords: C and N amendments of soil; cattle overwintering area; N2O emissions
Project no.: CEZ:AV0Z60660521 (CEP), GA526/04/0325 (CEP), 21-1072/2004
Funding provider: GA ČR, MŠk
Host item entry: Život v pode 6. Sborník z mezinárodního semináře, ISBN 80-213-1348-X

Institution: Institute of Soil Biology AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0109650

Permalink: http://www.nusl.cz/ntk/nusl-31728


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Research > Institutes ASCR > Institute of Soil Biology
Conference materials > Papers