摘要
辽宁省通海经济带快速的经济发展和城镇化进程使该区域耕地呈逐年减少的趋势,但该区耕地的变化情况及相应的驱动力仍不明确。利用主成分分析法对辽宁通海经济带耕地动态的驱动机制进行探讨,并根据主因子载荷对研究区耕地利用效率进行了估算。结果显示,1997-2010年间,耕地资源的锐减与经济飞速发展高度相关。粮食作物播种面积的迅速减少与GDP的"过热"增长阶段基本对应。经济快速发展,人口增加,城镇化持续推进,以及农业结构调整和科技投入是该地区耕地减少的主要驱动力。主成分分析方法的逆向应用得出研究区耕地利用效率为70.1%,可以进一步挖掘耕地用于农业生产的潜力。
The rapid development of economy and urbanization process of Seaward Economic Belt in Liaoning province caused cultivated land gradual decreases. However, the trends of cultivated land change and its associated driving force are still unknown. In this study, driving mechanism of cultivated land change is studied by the method of principal components analysis. According to the meaning of principal component factor loading, the utilization ratio of cultivated land was also estimated. Results show thatthe reduction of cultivated land has a close correlation with economic development during 1997-2010. The large reduction of sowing area was synchronous with the GDP'overheating'increases. The rapid development of economy, increase of population, continuous urbanization, agricultural structural adjustment and investment in science and technology are the main driving forces of cultivated land change in this area. Meanwhile, according to the principal components analysis, the utilization ratio of cultivated lande is 70.1% in this area, thus the potential of cultivated land used for agricultural production should be further developed.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第S2期53-59,共7页
Environmental Science & Technology
基金
农业区非点源污染控制与水质改善关键技术与示范(Z1515021)
国家自然科学基金(41473076)
关键词
通海经济带
耕地
驱动力
主成分分析
耕地利用效率
Seaward Economic Belt
cultivated land
driving forces
principal component analysis
utilization ratio of cultivated land
