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Evidence of N 2O emission and gaseous nitrogen losses through nitrification-denitrification induced by rice plants ( Oryza sativa L.)
- Source :
- Biology and Fertility of Soils; 20040801, Vol. 40 Issue: 3 p211-214, 4p
- Publication Year :
- 2004
-
Abstract
- A greenhouse experiment was conducted with a specially designed apparatus consisting of an upper and lower chamber where the treatment with rice was carried out (treatment 1). The apparatus also had a single chamber where treatment 2, without rice plants, was carried out. The scope of this study was to elucidate the influence of rice plant growth on gaseous N losses as N <subscript>2</subscript> and N <subscript>2</subscript>O produced by nitrification-denitrification in a flooded soil fertilized with (NH <subscript>4</subscript>) <subscript>2</subscript>SO <subscript>4</subscript> (with 56.50 atom% <superscript>15</superscript>N). Gas samples were withdrawn weekly and analyzed for (N <subscript>2</subscript> + N <subscript>2</subscript>O)- <superscript>15</superscript>N losses by mass spectrometer and for N <subscript>2</subscript>O by gas chromatograph. The gaseous (N <subscript>2</subscript> + N <subscript>2</subscript>O)- <superscript>15</superscript>N losses of the treatment with rice plants were significantly ( P =0.01) higher than those of the treatment without rice plants, as were the amounts of N <subscript>2</subscript>O emitted. Rice plants facilitate the efflux of N <subscript>2</subscript> and N <subscript>2</subscript>O from soil to atmosphere, as about half of the total gaseous <superscript>15</superscript>N loss as N <subscript>2</subscript> and N <subscript>2</subscript>O was found in the upper chamber. The proportion of N <subscript>2</subscript>O- <superscript>15</superscript>N to (N <subscript>2</subscript> + N <subscript>2</subscript>O)- <superscript>15</superscript>N in the upper chamber was 10.56%, much higher than that of the lower chamber in treatment 1 and the headspace of treatment 2.
Details
- Language :
- English
- ISSN :
- 01782762 and 14320789
- Volume :
- 40
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Biology and Fertility of Soils
- Publication Type :
- Periodical
- Accession number :
- ejs6277301
- Full Text :
- https://doi.org/10.1007/s00374-004-0758-y