Factors controlling the export of nitrogen from agricultural land in a large central European catchment during 19002010

Kód výsledku v IS VaVaI

RIV/60077344:_____/13:00394494 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1021/es400181m

DOI - Digital Object Identifier

10.1021/es400181m

Jazyk výsledku

angličtina

Název v původním jazyce

Factors controlling the export of nitrogen from agricultural land in a large central European catchment during 19002010

Popis výsledku v původním jazyce

Using an empirical model, we quantified the nitrogen (N) export from agricultural land in a large central European catchment (upper Vltava river, Czech Republic, about 13 000 km2) over the 19592010 period. The catchment witnessed a rapid socio-economic shift from a planned to a market economy in the 1990s, resulting in an abrupt 50% reduction in N fertilization rates at otherwise relatively stable land-use practices. This large-scale experiment enabled disentangling and quantification of individual effects of N fertilization and drainage on N leaching. The model is based on a two-step regression between annual N export and three independent variables: (i) annual average discharge in the first step and (ii) net anthropogenic nitrogen inputs (NANI) and proportion of drained agricultural land in the second step. Results show that N export was more related to mineralization of soil organic N pools due to drainage and tillage than to external N sources (NANI). The model, together with other

Název v anglickém jazyce

Factors controlling the export of nitrogen from agricultural land in a large central European catchment during 19002010

Popis výsledku anglicky

Using an empirical model, we quantified the nitrogen (N) export from agricultural land in a large central European catchment (upper Vltava river, Czech Republic, about 13 000 km2) over the 19592010 period. The catchment witnessed a rapid socio-economic shift from a planned to a market economy in the 1990s, resulting in an abrupt 50% reduction in N fertilization rates at otherwise relatively stable land-use practices. This large-scale experiment enabled disentangling and quantification of individual effects of N fertilization and drainage on N leaching. The model is based on a two-step regression between annual N export and three independent variables: (i) annual average discharge in the first step and (ii) net anthropogenic nitrogen inputs (NANI) and proportion of drained agricultural land in the second step. Results show that N export was more related to mineralization of soil organic N pools due to drainage and tillage than to external N sources (NANI). The model, together with other

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DJ - Znečištění a kontrola vody

OECD FORD obor

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Projekt

GAP504/12/1218: Vliv přirozeného rozpadu horských smrkových porostů na mikroklima, chemismus a biodiversitu terestrických a vodních ekosystémů.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Environmental Science and Technology

ISSN

0013-936X

e-ISSN

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Svazek periodika

47

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

6400-6407

Kód UT WoS článku

000320749000041

EID výsledku v databázi Scopus

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