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Nitrate Transformation and N 2 O Emission in a Typical Intensively Managed Calcareous Fluvaquent Soil: A 15-Nitrogen Tracer Incubation Study.
- Source :
-
Communications in Soil Science & Plant Analysis . 2015, Vol. 46 Issue 14, p1763-1777. 15p. - Publication Year :
- 2015
-
Abstract
- A 56-day aerobic incubation experiment was performed with 15-nitrogen (N) tracer techniques after application of wheat straw to investigate nitrate-N (NO3-N) immobilization in a typical intensively managed calcareous Fluvaquent soil. The dynamics of concentration and isotopic abundance of soil N pools and nitrous oxide (N2O) emission were determined. As the amount of straw increased, the concentration and isotopic abundance of total soil organic N and newly formed labeled particulate organic matter (POM-N) increased while NO3-N decreased. When15NO3-N was applied combined with a large amount of straw at 5000 mg carbon (C) kg−1only 1.1 ± 0.4 mg kg−1NO3-N remained on day 56. The soil microbial biomass N (SMBN) concentration and newly formed labeled SMBN increased significantly (P < 0.05) with increasing amount of straw. Total N2O-N emissions were at levels of only micrograms kg−1soil. The results indicate that application of straw can promote the immobilization of excessive nitrate with little emission of N2O. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00103624
- Volume :
- 46
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Communications in Soil Science & Plant Analysis
- Publication Type :
- Academic Journal
- Accession number :
- 108612163
- Full Text :
- https://doi.org/10.1080/00103624.2015.1044112