Ecological Functions and Their Values in Chinese Cropland Ecosystem |
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| Institution: | 1. Administrative Center for China''s 21 Agenda, Beijing 100038, China;2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;1. Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;2. Satellite Environment Center, Ministry of Environmental Protection, Beijing 100094, China;3. Institute of Geographic Science and Natural resources Research, CAS, Beijing 100101, China;1. CSIRO Land and Water, Canberra, ACT, Australia;2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;3. Hubei Provincial Collaborative Innovation Center for Water Resources Security, Wuhan 430072, China;4. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O. Box 2871, Beijing 100085, China;1. Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;3. College of Land Management, Nanjing Agricultural University, Nanjing 210095, China;4. Center for Global Change and Earth Observations, Michigan State University, East Lansing, MI 48824, USA;5. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China;1. Eco-environmental Protection Institute, Shanghai Academy of Agricultural Sciences, Shanghai Key Laboratory of Protected Horticultural Technology, Agricultural Environment and Farmland Conservation Experiment Station of Ministry Agriculture, Shanghai Engineering Research Centre of Low-carbon Agriculture, Shanghai, 201403, China;2. Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Shanghai Chongming Dongtan Wetland Ecosystem Research Station, Shanghai Institute of Eco-Chongming (SIEC), Fudan University, Shanghai, 200438, China;3. Department of Plant and Environmental Sciences, University of Copenhagen, Frederiksberg, DK–1958, Denmark;4. Shanghai Lanhui Eco-agricultural Science and Technology Company Limited, Shanghai, 202152, China;5. Shanghai Yingxi Fruit and Vegetable Professional Cooperatives, Shanghai, 202152, China |
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| Abstract: | Cropland ecosystem not only provides people with grains, vegetables, fibers, etc., but also plays an important role in air regulation, soil and water conservation, environmental decontamination, etc. Furthermore, cropland ecosystem has negative effects on our environment, such as soil and water pollution, because of the use of fertilizers and pesticides. So far, there are a few research findings about Chinese farmland's ecological functions, but only a part of ecological functions is discussed in this article. At present, an integrated research is needed in order to get a comprehensive understanding of cropland ecosystem. This article gives a primary result of ecological functions and their monetary values in Chinese cropland ecosystem. The results showed that the total monetary value of ecological functions provided by Chinese cropland ecosystem was 1912.18 billion yuan RMB in 2003 (present price in 2003); the positive value was 2233.41 billion yuan RMB and negative was ?321.23 yuan billion RMB. The value per hectare was 18960.60 yuan RMB/hm2, of which the value of crop products was 14788.70 yan RMB/hm2 and others were 4171.90 yuan RMB/hm2. The ecological functions in the farmland vary with regions. The values ranged from 8.68 to 505.08 billion yuan RMB, and HHHR and MLRYR were higher than those of the other ecological zones. The values per hectare ranged from 515.90 to 3498.43 yuan RMB/hm2, and SC and MLRYR were higher. |
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