[1]ZHANG Ru,DAI Wenting,LIU Zhaoshun,et al.Evaluation of Land Ecological Security in Agro-Pastoral Zone of Northern China—A Case Study of Baicheng City[J].Research of Soil and Water Conservation,2017,24(02):259-266.
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Evaluation of Land Ecological Security in Agro-Pastoral Zone of Northern China—A Case Study of Baicheng City
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 02
Page number:
259-266
Column:
Public date:
2017-04-28
- Title:
- Evaluation of Land Ecological Security in Agro-Pastoral Zone of Northern China—A Case Study of Baicheng City
- Keywords:
- agro-pastoral zone; land ecology; security evaluation; PSR model; Baicheng City
- CLC:
- X171.1
- DOI:
- -
- Abstract:
- Baicheng City is located in agro-pastoral zone in northern China. The ecological environment of this city is fragile. In order to understand the status of land ecological security in Baicheng City, we selected 21 indexes to construct the evaluating index system of land ecological security based on pressure-state-response model (PSR), and to evaluate and analyze the changes of land ecological security in Baicheng City and 5 counties (cities, districts) under its jurisdiction from 2007—2012. The results showed that:(1) statuses of land ecological pressure-state-response in different counties (cities, districts) were not same, the land ecological pressure values of Zhenlai County, Da’an County and Taobei District were higher, their contribution rates for comprehensive value were more than 38%; the land ecological state value of Taonan City was higher, and it’s contribution rate was more than 36%; the distribution of land ecological pressure-state-response value of Tongyu County was balanced, their contribution ratio was 35:34:31; (2) during the period from 2007 to 2012, the comprehensive value of land ecological security of Baicheng City increased from 0.712 2 to 0.780 4, and the land ecological environment had improved, but the land security level was still at the sensitive level, the ecological environment was fragile; (3) the improvement of land ecological security situation of Baicheng City depended on the implementation of effective population policy for controlling population scale, reducing the pollution pressure of land by introducing talent and encouraging farmers to develop new green agriculture, promoting ecological restoration of land by raising awareness and increasing investment in environmental protection.
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