Full TGIF Record # 38965
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Author(s):Velthof, G. L.; Brader, A. B.; Oenema, O.
Author Affiliation:Nutrient Management Institute (NMI), Department of Soil Science and Plant Nutrition, Wageningen Agricultural University, P.O. Box 8005, 6700 EC Wageningen, The Netherlands. Oenema, also at Research Institute for Agrobiology and Soil Fertility Research (AB-DLO), P.O. Box 129, 9750 AC Haren, The Netherlands
Title:Seasonal variations in nitrous oxide losses from managed grasslands in The Netherlands
Source:Plant and Soil. Vol. 181, No. 2, April 1996, p. 263-274.
# of Pages:12
Publishing Information:Dordrecht, Netherlands: Kluwer Academic Publishers
Related Web URL:http://link.springer.com/article/10.1007/BF00012061
    Last checked: 10/14/2015
    Notes: Abstract only
Keywords:TIC Keywords: Grasslands; Grazing; Groundwater; Nitrogen fertilizers; Nitrous oxide; Seasons; Weather
Abstract/Contents:"Seasonal and interannual variations in nitrous oxide (N₂ O) losses from agricultural soils hamper the accurate quantification of the N₂ O source strength of these soils. This study focuses on quantification of seasonal and interannual variations in N^D[ 2O losses from managed grasslands. Special attention was paid to N₂ O losses during the growing season and off-season as affected by grassland management. Fluxes of N^D2 O from grasslands with three different types of management and on four different soil types in the Netherlands were measured weekly during two consecutive years, using flux chambers. There were distinct seasonal patterns in N₂ O losses, with large losses during spring, summer, and autumn but relatively small losses during the winter. These seasonal variations were related to fertilizer N application, grazing and weather conditions. Measurements of N₂ O concentrations in soil profiles showed that a rise in groundeater level was accompanied by increased N^D2 O concentrations in the soil. Disregarding off-season losses would underestimate total annual losses by up to 20%, being largest for unfertilized grassland and smallest for N-fertilized grazed grassland. Total annual N₂ O losses ranged from 0.5 to 12.9 kg N ha⁻¹ yr⁻¹ for unfertilized grasslands to 7.3 to 42.0 kg N ha⁻¹ yr⁻¹ for N-fertilized grazed grasslands. Despite the considerable interannual variations in N₂ O losses, this study indicates that the results of measurements carried out in one year have predictive power for estimating N₂ O losses in other years."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Velthof, G. L., A. B. Brader, and O. Oenema. 1996. Seasonal variations in nitrous oxide losses from managed grasslands in The Netherlands. Plant Soil. 181(2):p. 263-274.
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