芜湖市近30年耕地数量变化特征分析

利用1971～2002年的统计资料,通过计算递减率的方法分析了芜湖市近30年来耕地数量变化的时间过程及空间差异.根据1990～2001年的详细统计资料,从国家建设用地、乡村集体建设用地、农民个人建房三个方面阐述了耕地流失的方向,得出耕地流失的主要流向是建设用地占用,揭示了耕地流失的特征,并在此基础上提出了4点对策,从而为研究耕地数量变化的驱动因子,为芜湖市制定科学的耕地资源可持续发展计划提供依据.

Dynamic Analysis of Total Amount of Cultivated Land in Wuhu City

The authors analyzed the time course and space difference of change in arable-land area in Wuhu City through the method to calculate the lapse rate ,according to the data of long-series statistics of arable-land area of 1971-2002 years. And through the detailed statistical data of 1990-2002 years, the authors concluded the majority of running off in arable-land , the construction land occupated of land,and revealed the direction and characteristics of running off in arable-land on the basis of analyzing the trends of land use in the fields such as state capital construction, collective construction and individual house building of peasant, Then, the authors proposed four eountermeasures in order to study the drive factors of cb.ange in arable-land area,offered the basis on which this city could make the scientific sustainable development plan of cultivated land resource.