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Within-field variability of mineral nitrogen in grassland

Nicolas Bogaert UGent, Joost Salomez UGent, Annick Vermoesen, Georges Hofman UGent, Oswald Van Cleemput UGent and Marc Van Meirvenne UGent (2000) BIOLOGY AND FERTILITY OF SOILS. 32(3). p.186-193
abstract
The within-field variability of soil mineral nitrogen (N-min) in a grazed grassland of 8000 m(2) was examined. NO3--N concentrations were characterized by a high spatial variability. This can be explained by the uneven deposition of animal excreta. All NH4+-N as well as NO3--N values were lognormally distributed, be fore and after the grazing season. At the end of the grazing season the largest part of the variability of NO3--N was found for NO3--N concentrations measured within a distance of a few metres. A high variability for NO3--N over very short distances was also indicated by a large nugget variance. During the grazing season, observed mean N-mn, values increased from 22 to 132 kg N ha(-1). Regions with clearly higher NO3--N concentrations could be identified. These zones matched with the drinking place and the entrance of the pasture, places which were more frequently visited than others. High residual N levels in autumn led to relatively high losses of N, mostly by leaching, during the subsequent drainage period. Knowing the variability of N-min, the number of samples needed to estimate the average N-min in a field could be calculated for different probabilities and various degrees of precision. From the spatial distribution of the N-min concentrations and the restrictions imposed by the new European decree, adapted fertilizer strategies can be proposed at least for places where systematically higher N-min concentrations can be expected.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
grazed grassland, nitrogen variability, nitrogen losses, leaching, geostatistics
journal title
BIOLOGY AND FERTILITY OF SOILS
Biol. Fertil. Soils
volume
32
issue
3
pages
186-193 pages
Web of Science type
Article
Web of Science id
000165620100002
ISSN
0178-2762
DOI
10.1007/s003740000233
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
172976
handle
http://hdl.handle.net/1854/LU-172976
date created
2006-02-18 18:49:00
date last changed
2010-02-01 09:56:01
@article{172976,
  abstract     = {The within-field variability of soil mineral nitrogen (N-min) in a grazed grassland of 8000 m(2) was examined. NO3--N concentrations were characterized by a high spatial variability. This can be explained by the uneven deposition of animal excreta. All NH4+-N as well as NO3--N values were lognormally distributed, be fore and after the grazing season. At the end of the grazing season the largest part of the variability of NO3--N was found for NO3--N concentrations measured within a distance of a few metres. A high variability for NO3--N over very short distances was also indicated by a large nugget variance. During the grazing season, observed mean N-mn, values increased from 22 to 132 kg N ha(-1). Regions with clearly higher NO3--N concentrations could be identified. These zones matched with the drinking place and the entrance of the pasture, places which were more frequently visited than others. High residual N levels in autumn led to relatively high losses of N, mostly by leaching, during the subsequent drainage period. Knowing the variability of N-min, the number of samples needed to estimate the average N-min in a field could be calculated for different probabilities and various degrees of precision. From the spatial distribution of the N-min concentrations and the restrictions imposed by the new European decree, adapted fertilizer strategies can be proposed at least for places where systematically higher N-min concentrations can be expected.},
  author       = {Bogaert, Nicolas and Salomez, Joost and Vermoesen, Annick and Hofman, Georges and Van Cleemput, Oswald and Van Meirvenne, Marc},
  issn         = {0178-2762},
  journal      = {BIOLOGY AND FERTILITY OF SOILS},
  keyword      = {grazed grassland,nitrogen variability,nitrogen losses,leaching,geostatistics},
  language     = {eng},
  number       = {3},
  pages        = {186--193},
  title        = {Within-field variability of mineral nitrogen in grassland},
  url          = {http://dx.doi.org/10.1007/s003740000233},
  volume       = {32},
  year         = {2000},
}

Chicago
Bogaert, Nicolas, Joost Salomez, Annick Vermoesen, Georges Hofman, Oswald Van Cleemput, and Marc Van Meirvenne. 2000. “Within-field Variability of Mineral Nitrogen in Grassland.” Biology and Fertility of Soils 32 (3): 186–193.
APA
Bogaert, N., Salomez, J., Vermoesen, A., Hofman, G., Van Cleemput, O., & Van Meirvenne, M. (2000). Within-field variability of mineral nitrogen in grassland. BIOLOGY AND FERTILITY OF SOILS, 32(3), 186–193.
Vancouver
1.
Bogaert N, Salomez J, Vermoesen A, Hofman G, Van Cleemput O, Van Meirvenne M. Within-field variability of mineral nitrogen in grassland. BIOLOGY AND FERTILITY OF SOILS. 2000;32(3):186–93.
MLA
Bogaert, Nicolas, Joost Salomez, Annick Vermoesen, et al. “Within-field Variability of Mineral Nitrogen in Grassland.” BIOLOGY AND FERTILITY OF SOILS 32.3 (2000): 186–193. Print.