广东省耕地压力区域差异研究

从区域角度出发,以广东省21个市为例,从耕地资源丰缺度切入,分析耕地总量及人均占有量的区域差异,计算并构建区域耕地减少量与人均GDP的回归模型,得到两者倒"U"型曲线;采用耕地压力指数,计算并构建了全省四大区域耕地压力指数与人均GDP及产业结构的回归模型,比较了区域间耕地压力的差距,结果显示珠江三角洲区域耕地压力最大,且内部差异也较大,而东部、北部、西部承受的压力相当,内部差异较小,但各区域耕地压力来源不同,提出耕地压力阈值假设,明确当前处于压力阈值的4个市域,分别是广州市、东莞市、江门市和惠州市;通过辨识不同区域耕地承压状况及区域差异,明确当前耕地保护的重要意义.

Research on the district difference of cultivated land pressure in Guangdong

Taking the degree of cultivated land resource abundance or exiguity in 21 cities of Guangdong as an example,analyze the district difference in gross quantity and quantity per capita of cultivated land,calculate and build the regressive model between the reductive quantity of cultivated land and the GDP per capita,and create the converse "U" curve between both.Calculate and build the regressive model of the four main district between the pressure index and the GDP per capita or industrial structure,compare the cultivated land pressure gap between the different district: the most pressure district was the Pearl Delta,including its interior difference;and the east,north and west district had the similar pressure,including its interior.The reasons of the pressure came from different way.Put forward a hypothesis of threshold pressure and point out that the four cities are in the threshold pressure situation,which are Huizhou,Jiangmen,Guangzhou and Dongguan city.It is very useful for different district to understand its pressure and the difference between them,which helps them to protect cultivated land resource correctly.