Proximal and distal control by pH of denitrification rate in a pasture soil

0361528 - BC 2012 RIV NL eng J - Journal Article
Čuhel, Jiří - Šimek, Miloslav
Proximal and distal control by pH of denitrification rate in a pasture soil.
Agriculture, Ecosystems and Environment. Roč. 141, 1-2 (2011), s. 230-233. ISSN 0167-8809. E-ISSN 1873-2305
R&D Projects: GA AV ČR IAA600660605; GA MŠMT LC06066
Grant - others:Grantová agentura Jihočeské univerzity(CZ) GAJU 142/2010/P
Institutional research plan: CEZ:AV0Z60660521
Keywords : denitrification * pH * nitrous oxide
Subject RIV: EH - Ecology, Behaviour
Impact factor: 3.004, year: 2011

Soil pH can influence denitrification both proximally and distally. Proximal control by pH involves direct changes in denitrification reductase activity while distal control by pH involves changes in the denitrifier community, which is a key component affecting the denitrification rate. The current study separated the proximal and distal control by pH of the denitrification rate and of the relative proportion of two denitrification gas products (N₂O and N₂). The potential denitrifying enzyme activity (DEA) was measured in the presence or absence of acetylene in three pasture soils differing in pH management in the field. The pH of these soils was further manipulated just before DEA measurement to determine the effect of short-term changes in pH. DEA was driven by the pH management in the field rather than by current pH resulting from short-term changes in pH.
Permanent Link: http://hdl.handle.net/11104/0198825