甘肃省武威市凉州区耕地占用与经济发展的脱钩关系

Relation Between Cultivated Land Occupation and Economic Growth Based on Decoupling Method of Liangzhou District of Wuwei City in Gansu Province

[目的]对甘肃省武威市凉州区耕地占用与经济发展的关系进行实证研究,为经济发展中的凉州区的耕地保护工作提供参考。[方法]选取建设占用耕地量、非农GDP产值两个指标作为主要指标,并对非农GDP进行重新界定,采用改进的脱钩分析方法。[结果](1)凉州区2001—2010年建设占用耕地与非农GDP的关系主要呈现出7种状态,即强负脱钩、扩张负脱钩、强脱钩、衰退脱钩、衰退连接、弱脱钩、扩张连接,表现为强脱钩和弱脱钩的状态期数合计占统计期数的40%,总体上有2个年期处于强脱钩状态;(2)脱钩弹性曲线总体上表现出M形变化,呈现出"非理想状态—畸形状态—理想状态"的周期性变化,且凉州区近年来都表现为脱钩的理想状态,经济发展摆脱了以牺牲耕地资源为代价的经济增长方式。[结论]对非农GDP进行了重新界定,改进了脱钩的研究方法,研究结果及产生脱钩的原因与凉州区的实际情况相吻合。

[Objective]The empirical relationships between the occupation of cultivated land by construction in Liangzhou District of Wuwei City in Gansu Province and economic development were demonstrated to provide a reference for arable land protection in the process of economic development in liangzhou district.[Methods]Two indices including the occupation of cultivation land by construction and redefined non-agricultural GDP were used.And decoupling method was adopted.[Results]（1）In 2001—2010,the relationships between the occupation of cultivation land by construction and non-agricultural GDP mainly presented seven kinds of state,they were：strong negative decoupling,expansively negative decoupling,decoupling,and recessive association,weak decoupling and expansive association.Among of them,terms in the state of strong decoupling and weak decoupling covered 40% of the investigated period.Generally,two years were in the strong decoupling state.（2）The decoupling elastic curve generally looked like a M shape.It presented a＂the ideal state-deformed state-ideal＂cyclical change.And in recent years,development of liangzhou district was characterized by an ideal decoupling state.The economic development has deorbited the former economic growth route that is characterized by the expense of cultivation land resources.[Conclusion]The results elucidated by the improved decoupling method and redefined non-agricultural GDP were exactly the actual situation in liangzhou district.