Research on the Sustainability of Cultivated land in Henan Province Based on Ecological Footprint Model

Regional situation of Henan Province in China was summarized.The principle of ecological footprint model as well as the computing formulas of ecological footprint and ecological capacity was analyzed.According to the related data of Henan Province from 1998 to 2007,firstly,per capita ecological footprint and per capita ecological capacity were calculated.The results showed that cultivated land in Henan Province showed ecological surplus.Land use was sustainable,and ecological surplus had increased since 2003.Secondly,ecological footprint of cultivated land was analyzed dynamically.Thirdly,per capital ecological demand and supply in 18 districts and cities of Henan province during 2007 were studied.Cultivated land in these areas was sustainable.Zhumadian City had the highest ecological surplus and per capita ecological capacity,and Nanyang City had the highest per capita ecological footprint.Based on this,five proposals were put forward on ensuring the increase of grain yield.