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Quantifying the total airborne nitrogen input into agroecosystems in the North China Plain
- Source :
-
Agriculture, Ecosystems & Environment . Aug2007, Vol. 121 Issue 4, p395-400. 6p. - Publication Year :
- 2007
-
Abstract
- Nitrogen (N) input from atmospheric deposition is a concern in the North China Plain (NCP). To quantify the magnitude of the problem, the total airborne N deposition to agroecosystems in the NCP was quantified using a manual ITNI (integrated total nitrogen input) system and a long-term experiment (LTE). Total estimated N deposition averaged 83. 3kgNha−1 across the sites Dongbeiwang (DBW) of Beijing, Wuqiao (WQ) and Quzhou (QZ) of Hebei, with atmospheric N input 14kgNha−1 in the period from flowering to maturity, when maize (Zea mays) was the monitoring crop. The 15N-supply level in the ITNI system seemed not to affect the estimation of N deposition significantly. However, the N deposition value was only 48. 6kgNha−1 on average when ryegrass (Lolium multiflorum) was cultivated during the same period of maize (May–September), suggesting that total airborne N input varies with the monitoring crop, largely because of the different surface areas. The total annual N deposition obtained from zero-N plots of LTE at Changping (82. 8kgNha−1) supported the N deposition results from the maize-based ITNI systems. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01678809
- Volume :
- 121
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Agriculture, Ecosystems & Environment
- Publication Type :
- Academic Journal
- Accession number :
- 24458641
- Full Text :
- https://doi.org/10.1016/j.agee.2006.12.016