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Journal of Arid Land
Research Articles     
Estimating total nitrogen deposition in agroecosystems in northern China during the wheat cropping season
ChunE HE, XueJun LIU, Christie PETER, Fangmeier ANDREAS, FuSuo ZHANG
1 College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China; 2 Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, China; 3 Xinjiang Institute of Ecology and Geology, Chinese Academy of Sciences, Urumqi 830011, China; 4 Agri-Environment Branch, Agri-Food and Biosciences Institute, Belfast BT9 5PX, UK; 5 Institute of Plant Ecology and Landscape, University of Hohenheim, Stuttgart, Germany
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Abstract  Atmospheric nitrogen (N) deposition has been poorly documented in northern China, an intensive agricultural and industrial region with large emissions of NHx and NOy. To quantify N deposition, total airborne N deposition was determined at three agricultural sites using a manual integrated total nitrogen input (ITNI) system during growth of winter wheat (Triticum aestivum L.) and Italian ryegrass (Lolium multiflorum Lam.) from September 2005 to May 2006. Total estimated N deposition averaged 54.9 and 43.2 kg N/hm2 across the three sites when wheat was grown to flowering and maturing, respectively. The average value was 50.2 kg N/hm2 when ryegrass was the indicator plant. Both indicator species gave similar total airborne N input results. The intermediate level of N supplied resulted in the highest N deposition, and the ratio of N acquired from deposition to total N content of the whole system decreased with increasing N supply to the roots. The contribution of atmospheric N to the total N content of the wheat and ryegrass sand culture systems ranged from 10% to 24%.

Received: 12 December 2009      Published: 07 March 2010
Corresponding Authors: XueJun LIU     E-mail: xuejun13500@gmail.com
Cite this article:

ChunE HE, XueJun LIU, Christie PETER, Fangmeier ANDREAS, FuSuo ZHANG. Estimating total nitrogen deposition in agroecosystems in northern China during the wheat cropping season. Journal of Arid Land, 2010, 2(1): 2-8.

URL:

http://jal.xjegi.com/10.3724/SP.J.1227.2010.00002     OR     http://jal.xjegi.com/Y2010/V2/I1/2

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