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Economic value of vegetation carbon fixation and oxygen release in Loess Plateau of North Shaanxi Province under land-use and land-cover change

XIE Hong-xia1,2; REN Zhi-yuan1; LI Rui1,2   

  1. 1College of Tourism and Environment Sciences, Shaanxi Normal University, Xi’an 710062, China;
    2Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling 712100, Shaanxi, China
  • Received:2006-07-25 Revised:1900-01-01 Online:2007-03-15 Published:2007-03-15

Abstract: By using land-use and meteorological data, estimation was made on the economic value of vegetation carbon fixation and oxygen release in the Loess Plateau of North Shaanxi under land-use and land-cover change. Compared with that in 1986, this economic value in 1996 and 2001 was increased by 9.97718×108 yuan and 1.361481×109 yuan, respectively. The policies of returning farmland to forest and grassland and of reasonably controlling the increase of urbanization area were of significance in improving the ecological functions of the Loess Plateau in North Shaanxi Province.

Key words: Oryza sativa, Selenium pollution, Anti-oxidative enzymes, Ecological effect, Critical value