With social and economic speediness development of China, the changes both areas and quality of cultivated land is posing a challenge to food safety.

• 随着我国经济社会快速发展，耕地面积与质量变化对粮食安全构成了严峻挑战，受到社会各界的日益关注，对耕地地力评价的研究越来越多。