Construction and evaluation of cultivated land ecological security system: a case study in Zhuhai city

Research purposes: this paper concluded that cultivated land ecological security situation of Zhuhai, and forecast its future trend, to provide a scientific reference for Zhuhai cultivated land ecological security. Methods: through the Driver - Pressures - State - Impact - Responses(DPSIR model) combined with analytic hierarchy process (AHP) to build Zhuhai cultivated land ecological security system evaluation model, then using ArcGIS software to the spatial data processing and get the area of cultivated land ecological security level each year. Results show that: (1) Zhuhai for cultivated land ecological security in 1988: Level 2 accounted for 4% of the total area of cultivated land, and Level 3 accounted for 85.46% of the total area of cultivated land, and Level 4 accounts for 10.54% of the total area of cultivated land. (2) Zhuhai for cultivated land ecological security in 1998: Level 2 accounted for 7.41% of the total area of cultivated land, and Level 3 accounted for 47.17% of the total area of cultivated land, and Level 4 accounts for 45.37% of the total area of cultivated land, and Level 5 accounts for 0.05% of the total area of cultivated land. (3) Zhuhai for cultivated land ecological security in 2008: Level 2 accounted for 4.43% of the total area of cultivated land, and Level 3 accounted for 13.42% of the total area of cultivated land, and Level 4 accounts for 80.62% of the total area of cultivated land, and Level 5 accounts for 1.53% of the total area of cultivated land. Conclusion: Zhuhai increased cultivated land ecological security in 20 years, there is no level 1 of cultivated land. The cultivated land in 1988 was mainly 3 grade, and in 1998 was mainly 3 grade and 4 grade, in 2008 was mainly 4 grade.