Journal of Central South University

, Volume 18, Issue 5, pp 1465–1472 | Cite as

Assessment on soil fertility of Dongting Lake wetland area (China) based on GIS and fuzzy evaluation

  • Zhong-wu Li (李忠武)Email author
  • Jin-quan Huang (黄金权)
  • Yu-yuan Li (李裕元)
  • Wang Guo (郭旺)
  • Jian-feng Zhu (朱剑峰)


Using soil data of the Second National Field Survey, the soil fertility of wetland ecosystem of Dongting Lake was evaluated by using the technology of GIS and method of fuzzy evaluation. Integrated with the wetland actuality of Dongting Lake and particularity of paddy, seven factors (including soil organic matter, total nitrogen, total phosphorus, total potassium, available phosphorus, available potassium, and pH value), closely related with soil fertility, were chosen to establish the index system of synthetical evaluation. Based on the effect degree of each selected index on soil fertility, a judgment matrix was built, and the weight coefficient was determined by the method of correlation coefficient. Finally, under the support of the spatial analysis module of GIS (Geographic Information System), the spatial distribution properties of soil fertility in wetland ecosystem of Dongting Lake were studied. The results show that the soil fertility of Dongting Lake wetland ecosystem is not very good, and the area of type III and type IV achieves 69.8%. As a result, many countermeasures should be taken to improve the soil fertility. As for the spatial properties, the soil fertility level of central and west Dongting Lake is much higher than that of north and south part. The soil fertility of paddy field surpasses that of red soil, and the contents of soil organic matter and total nitrogen in paddy field are large.

Key words

Dongting Lake wetland ecosystem soil fertility fuzzy evaluation geographic information system (GIS) 


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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Zhong-wu Li (李忠武)
    • 1
    • 2
    Email author
  • Jin-quan Huang (黄金权)
    • 1
    • 2
  • Yu-yuan Li (李裕元)
    • 3
  • Wang Guo (郭旺)
    • 1
    • 2
  • Jian-feng Zhu (朱剑峰)
    • 1
    • 2
  1. 1.College of Environmental Science and EngineeringHunan UniversityChangshaChina
  2. 2.Key Laboratory of Environmental Biology and Pollution Control, Ministry of EducationHunan UniversityChangshaChina
  3. 3.Institute of Subtropical AgricultureChinese Academy of SciencesChangshaChina

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