甘肃省不同生态区耕地压力差异研究

从甘肃省不同生态区入手,采用耕地压力指数模型,对全省耕地压力进行测算,并建立全省耕地压力指数与人均GDP及产业结构的回归模型,比较了各生态区耕地压力的差距。结果表明,甘肃省1978~2006年耕地压力呈先递减后增长的变化趋势,人均GDP呈快速增长的趋势;各生态区除河西区外,中部地区、陇东区、陇南区和甘南区耕地压力均随经济的发展而不断增大,但各生态区耕地压力来源不同;河西区耕地压力的增大也与经济发展相关,但相关度不大,压力主要来源于生态环境的恶化及灾害的发生;最后针对各生态区不同的耕地压力来源,提出了耕地保护的策略。

Study on the Farmland Pressure in Differences among Ecological District Gansu Province

Starting from the different ecological districts of Gansu Province,index model of cultivated land pressure was used.And the farmland pressure of Gansu Province was calculated.The regressive models of all districts of the farmland pressure index,the GDP per capita and the industrial structure were established.The differences of farmland pressure in each ecological districts were compared.Result showed that the farmland pressure from 1978 to 2006 showed degression tendency,and then increased.The GDP per capita showed speedy increase.The farmland pressures of all ecological districts but Hexi district showed continuous increasing trend with the fast development of economy,but the pressure sources of the ecological districts were different.And the increase of farmland pressures in Hexi District had a little correlation with the development of economy.The sources of pressure were the deterioration of ecological environment and the occurrence of disaster.According to the different sources of farmland pressures in different ecological districts,the protection measures of farmland were put forward.