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| Analysis and Assessment of Environmental Quality of Farmland in Dongguan City Based on “Press-State- Response” Framework |
| Received:October 20, 2014 |
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| KeyWord:farmland environmental quality;“Press-State-Response” framework;coordination degree;evaluation model;Dongguan City |
| Author Name | Affiliation | E-mail | | QIU Meng-long | College of Resources and Environment, China Agricultural University, Beijing 100193, China | | | WANG Qi | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | CHEN Jun-jian | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | YANG Guo-yi | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | LI Fang-bai | Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control, Guangdong Institute of Eco-Environmental and Soil Sciences, Guangzhou 510650, China | | | LIU Li-ming | College of Resources and Environment, China Agricultural University, Beijing 100193, China | liulm@cau.edu.cn |
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| Abstract: |
| A framework and indicator system of environmental quality assessment of farmland were constructed based on the“Press-State-Response”(PSR) model. Taking Dongguan city as a case study, “Press-State-Response” model was successfully developed using 182 farmland soil samples and socioeconomic data obtained from Dongguan statistical yearbook. The indicator system was thus applied to assess the environmental quality of farmland and indexes of pressure, state and response were also analyzed. Environmental quality of farmland was divided into 5 grades:superior, good, warning, low and poor. Coordination degree was used to analyze the stability of environmental quality of farmland. Results showed that 28.2% of total farmland in Dongguan was superior or good, which is mainly distributed in river network area in the north of Dongguan. Fifty six point one percent(56.1%) was warning and 15.7% low. The pressure from economic development and industrial waste discharge, farmland natural characteristics, and unreasonable agricultural practices and managements were the major factors influencing farmland environmental quality. Low coordination degree of each PSR subsystem was found in Nancheng,Wangniudun, Shatian and Changan township, indicating unstable farmland environmental quality in these townships. The present study would be useful for a targeted soil protection plan and sustainable use of land resources in Dongguan city. |
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