Agricultural Nitrogen Budget in the Yangtze River Basin from 1990 to 2000

Abstract:

For the purpose of estimating the amount of nitrogen (N) added to the agroecosystem by human activities in the Yangtze River Basin, and analyzing temporal and spatial changes of N budget in the Yangtze River Basin from 1990 to 2000. Following the mass balance model, a complete N budget was established for the Yangtze River Basin. N input sources include inorganic fertilizer, atmospheric deposition, biological fixation, excrement as fertilizer, crop residue used as fertilizer and combustion of crop residue. N output sources include crop harvesting, denitrification of soil nitrate, and NH3 volatilization. The budget had been calculated as the difference between all inputs and outputs. The total N input was 13.03 Tg N and 17.71 Tg N in 1990 and 2000, respectively. The total N output was 6.83 Tg N in 1990 and 8.76 Tg N in 2000, respectively. The N budget was 6.20 Tg N in 1990 and 8.95 Tg N in 2000 in agricultural fields of the Yangtze River Basin.

• Periodical: Advanced Materials Research (Volume 599)
• Pages: 159-167
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.599.159
• Online since: November 2012
• Authors: Xiang Bao, Guang Wen Ma, Ye Yao Wang
• Keywords: Agriculture, Nitrogen Budget, River Basin, Water Pollution, Water Quality

References

[1] J. Zhang, Z. F. Zhang, S. M. Liu, Y. Wu, H. Hong, and H. T. Chen: Global Biogeochemical Cycles, Vol.13 (1999), p.1101

[2] H. Harenz, W. Köster, and D. Merkel: Agrobiol Res, Vol. 45 (1992), p.287

[3] L. Ahti, G. Kirsti, K. Pirkko, R. Antti: Science of the Total Environment, Vol. 365(2006), p.240

[4] J. L. Hatfield, and J. H. Prueger: Nitrogen over-Use, under-Use, and Efficiency. International Crop Science Congress Proceedings. 4th International Crop Science Congress, Brisbane, Queensland, Australia (2004), p.52

[5] A. Dobermann, and K. G. Cassman: Science in China Ser: C Life Sciences, Vol.48 (2005), p.747

[6] Information on http://www.millenniumassessment.org.

[7] G. X. Xing, and Z.L. Zhu: Biogeochemistry, Vol.57/58 (2002), p.407

[8] Z. L. Shen, Q. Liu, S. M. Zhang, H. Miao, and P. Zhang: Ambio, Vol.32(2003), p.66

[9] W. J. Yan, and S. Zhang: Global Biogeochem Cycles, Vol.17(2003), p.5

[10] Z. L. Shen, and Q. Liu: Environ Monit Assess, Vol.153(2009), p.29

[11] China's county-level agricultural database of 1990 and 2000. National Resources and Environmental Data Center, China.

[12] R. W. Howarth, G. Billen, D. Swaney, A. Townsend, N. Jaworski, K. Lajtha, et al: Biogeochemistry, Vol.35(1996), p.80

[13] V. Smil: Global Biogeochem Cycles, Vol.13 (1999), p.650

[14] V. Smil: Enriching the Earth: Fritz Haber, Carl Bosch and the Transformation of World Food Production. Cambridge:MIT Press(2001).

DOI: 10.7551/mitpress/2767.001.0001

[15] L. Yang, and B. Sun: Nutrient cycling, balance and management in farmland ecosystem of China. Beijing: Science Press(2008).

[16] W. X. Wang: China Environ Science, Vol. 11 (1994), p.325

[17] Z.L. Shen: Mar. sci, Vol.1 (1996), p.62

[18] C. Liu, M. Watanabe, and Q. X. Wan: Nutr Cycl Agroecosyst, Vol.80 (2008), p.30

[19] B. Xiang, M. Watanabe, Q. X. Wang, S. Hayashi, and J. Y. Liu: Science of the Total Environment, Vol.363 (2006), p.141

[20] G. X. Xing, and X.Y. Yan: Environmental Sciences & Policy, Vol.2 (1999), p.359

[21] R. Burkart. Michael, and E. James. David: Journal of Environmental Quality, Vol.28 (1999), p.853

[22] IPCC: International Panel on Climate Change Guidelines for National Greenhouse Gas Inventories, Chapter 4. Agriculture: Nitrous oxide from agricultural soil and manure management. OECD, Paris (1996).

[23] M. O. Andreae, and P. Merlet: Global Biogeochem. Cycles, Vol.15 (2001), p.959

[24] W. Y. Yan, C. Q. Yin, and S. Zhang: Biogeochemistry, Vol. 45 (1999), p.9

[25] Information on http://www.nrcs.usda.gov/technical/ECS/nutrient/tbb2. html.

[26] V. N. Bashkin, S. U. Park, M. S. Choi and C. B. LEE: Biogeochemistry, Vol.57/58(2002), p.391

[27] G. X. Xing, and Z. L. Zhu: Nutr Cycl Agroecosyst, Vol.57 (2000), p.69