Nutrient Cycling in Agroecosystems

, Volume 63, Issue 2–3, pp 117–127

Nitrogen fertilizer use in China – Contributions to food production, impacts on the environment and best management strategies

  • Z.L. Zhu
  • D.L. Chen
Article

Abstract

China is a big country with a huge population and limited farmland area per capita. To produce enough food for feeding the population is of vital importance for the county. A huge achievement in food production since 1949 has been made. The regression analysis in each period of 10 years shows that there is a significant positive linear correlation between the annual food production and annual chemical fertilizer N (CF-N) consumption throughout 1949–1998. However, the regression coefficient, b, in each period of 10 years since 1949 has been declining rapidly. Meanwhile, environmental pollution is becoming a serious issue. In last 20 years, N concentratjons in surface and ground water have been increasing, `Alga blooms' in lakes and `red tides' in estuaries occur frequently, and the emissions of N2O and NH3 from farmlands rise. This paper reviews the causes for the declining N efficiency and rising environmental impacts, and the strategies for better fertilizer management.

agriculture China environment food nitrogen nitrogen loss 

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Z.L. Zhu
    • 1
    • 2
  • D.L. Chen
    • 1
  1. 1.Institute of Soil ScienceChinese Academy of SciencesNanjingChina
  2. 2.Department of Resource Management and HorticultureThe University of MelbourneVictoriaAustralia

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