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Nitrous oxide emissions from European agriculture - an analysis of variability and drivers of emissions from field experiments

Artikel i vetenskaplig tidskrift
Författare R. M. Rees
J. Augustin
G. Alberti
B. C. Ball
P. Boeckx
A. Cantarel
S. Castaldi
N. Chirinda
B. Chojnicki
M. Giebels
H. Gordon
B. Grosz
L. Horvath
R. Juszczak
Åsa Kasimir Klemedtsson
Leif Klemedtsson
S. Medinets
A. Machon
F. Mapanda
J. Nyamangara
J. E. Olesen
D. S. Reay
L. Sanchez
A. S. Cobena
K. A. Smith
A. Sowerby
M. Sommer
J. F. Soussana
M. Stenberg
C. F. E. Topp
O. van Cleemput
A. Vallejo
C. A. Watson
M. Wuta
Publicerad i Biogeosciences
Volym 10
Nummer/häfte 4
Sidor 2671-2682
ISSN 1726-4170
Publiceringsår 2013
Publicerad vid Institutionen för geovetenskaper
Institutionen för biologi och miljövetenskap
Sidor 2671-2682
Språk en
Länkar dx.doi.org/10.5194/bg-10-2671-2013
https://gup.ub.gu.se/file/108596
Ämnesord filled pore-space, n2o emissions, grassland systems, co2 emissions, soils, management, fluxes, fertilization, crop
Ämneskategorier Geovetenskap och miljövetenskap

Sammanfattning

Nitrous oxide emissions from a network of agricultural experiments in Europe and Zimbabwe were used to explore the relative importance of site and management controls of emissions. At each site, a selection of management interventions were compared within replicated experimental designs in plot based experiments. Arable experiments were conducted at Beano in Italy, El Encin in Spain, Foulum in Denmark, Logården in Sweden, Maulde in Belgium, Paulinenaue in Germany, Harare in Zimbabwe and Tulloch in the UK. Grassland experiments were conducted at Crichton, Nafferton and Peaknaze in the UK, Gödöllö in Hungary, Rzecin in Poland, Zarnekow in Germany and Theix in France. Nitrous oxide emissions were measured at each site over a period of at least two years using static chambers. Emissions varied widely between sites and as a result of manipulation treatments. Average site emissions (throughout the study period) varied between 0.04 and 21.21 kg N2O-N ha−1 yr−1, with the largest fluxes and variability associated with the grassland sites. Total nitrogen addition was found to be the single most important determinant of emissions, accounting for 15% of the variance (using linear regression) in the data from the arable sites (p < 0.0001), and 77% in the grassland sites. The annual emissions from arable sites were significantly greater than those that would be predicted by IPCC default emission factors. Variability in N2O within sites that occurred as a result of manipulation treatments was greater than that resulting from site to site and year to year variation, highlighting the importance of management interventions in contributing to greenhouse gas mitigation.

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