JOURNAL OF NATURAL RESOURCES ›› 2014, Vol. 29 ›› Issue (2): 237-248.doi: 10.11849/zrzyxb.2014.02.005

• Resources Ecology • Previous Articles     Next Articles

Nitrogen Budgets of the Pearl River Delta and Its Regional Differences during the Past Decade

XIE Li-chun1, CHEN Jian-yao2   

  1. 1. School of Geography and Tourism, Guangdong University of Finance & Economics, Guangzhou 510320, China;
    2. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China
  • Received:2012-11-19 Revised:2013-03-04 Online:2014-02-20 Published:2014-02-18
  • About author:2

Abstract:

Based on the data collection and analysis of the industry, agriculture, environmental protection, natural conditions and population statistics in the Pearl River Delta (PRD) in 2000, 2005 and 2010, respectively, the nitrogen budgets and its regional differences in the PRD during the past decade were assessed. The results indicate that the nitrogen inputs and outputs of the PRD varied slightly during the last ten years, whereas the nitrogen surplus increased continuously. The nitrogen surplus in per unit area increased from 43.43 kg/(hm2·a) in 2000 to 51.92 kg/(hm2·a) in 2010. The nitrogen inputs in per unit area of the PRD are much higher than the average level over the whole country, but it is still a bit lower than that of the Yangtze River Delta. In addition, the rapid development of urbanization and increasing human activities show strong influences on the evolution of the nitrogen budgets during the past decade, and great regional differences exist in the nitrogen budgets of the PRD, several cities such as Shenzhen, Dongguan, Foshan and Guangzhou have to face severer nitrogen pollution potential at present.

Key words: the Pearl River Delta, nitrogen pollution, nitrogen budgets

CLC Number: 

  • X144