Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 34946
Title Spatial variability of nitrous oxide fluxes in mown and grazed grasslands on a poorly drained clay soil.
Author(s) Velthof, G.L.; Jarvis, S.C.; Stein, A.; Allen, A.G.; Oenema, O.
Source Soil Biology and Biochemistry 28 (1996). - ISSN 0038-0717 - p. 1215 - 1225.
DOI http://dx.doi.org/10.1016/0038-0717(96)00129-0
Department(s) Laboratory of Soil Science and Geology
Sub-department of Soil Quality
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 1996
Keyword(s) zware kleigronden - graslanden - uitspoelen - distikstofmonoxide - bodem - geostatistiek - clay soils - grasslands - leaching - nitrous oxide - soil - geostatistics
Categories Soil Physics
Abstract Fluxes of nitrous oxide (N2O) were measured in mown and intensively-grazed plots on a slightly-sloping, poorly-drained clay soil, using 144 flux chambers on four consecutive days. We tested the hypotheses that (i) spatial variability of N2O fluxes is larger in grazed than in mown grassland and (ii) spatial dependency is larger in mown than in grazed grassland. Distributions were approximately log-normal. Fluxes from grazed grassland were larger than those from mown grassland. Multiple linear regression analyses showed weak relationships between N2O flux and moisture, NH4 , NO3− and C contents, with less than 15% of the variance in N2O flux accounted for. Spatial variability was large both on a relatively small scale (less than 6 m) and on a larger scale (10–100 m) and was larger on mown grassland than on grazed grassland. Geostatistics showed that N2O fluxes were spatially dependent for a lag distance of less than 6 m on mown grassland. On grazed grassland fluxes were spatially independent on a scale of < 6 m. The large spatial variability of N2O fluxes suggests that even measurement techniques that integrate N2O fluxes over a large area may be hampered by the large spatial variability of N2O fluxes.
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