黑龙江省贫困片区耕地生态安全及影响因子研究

Study on Cultivated Land Ecological Security Appraisal and Influencing Factors in the Poverty Areas of Heilongjiang Province

为探讨贫困地区耕地的生态安全,以黑龙江省贫困片区为研究区,运用熵权法、多因素综合评价模型和主成分分析法,定量评价和分析耕地生态安全及其影响因子。结果表明,黑龙江省贫困片区内耕地生态安全水平总体上处于较低的状态,位于第Ⅱ级到第Ⅳ级之间,其中耕地生态安全水平最高的是龙江县和富裕县,处于较安全水平;其次是望奎县、青冈县、明水县和林甸县,处于敏感水平;最低的是依安县、泰来县、甘南县、克东县、拜泉县和兰西县,处于风险水平。耕地生态安全值空间分布与国家级贫困县和省级贫困县的分布较为吻合,表明贫困程度越深,耕地生态安全越不容乐观。社会经济压力、科学技术发展和自然环境是黑龙江省贫困片区耕地生态安全的主要影响因子。

In order to discuss the ecological security of cultivated land in the poor areas, this passage takes the poverty area of Heilongjiang Province as the research area. Using entropy weight method, multi factor comprehensive evaluation model and principal component analysis method, the paper quantitatively accesses and analyzes the ecological security of cultivated land and its influencing factors. The result shows, the ecological security level of cultivated land in the poverty area of Heilongjiang province is in a low state overall, between the secondary and the fourth. The highest level of ecological security of cultivated land is in Longjiang County and Fuyu County, which is in a relatively safe level. The second is Wangkui County, Qinggang County, Mingshui County and Lindian County, at the sensitive level. The level of ecological security of cultivated land is the lowest in Yi＇an County and Tailai County, Gannan County, Kedong County, Baiquan County and Lanxi County, at the level of risk. The spatial distribution of the ecological security of cultivated land is in conformity with that of national poor counties and provincial poor counties. The level of poverty is more deep, cultivated land ecological security becomes more poor. Social economic pressure, scientific and technological development and natural environment are the main factors that affect the ecological security of cultivated land in the poverty areas of Heilongjiang Province.