Evaluation on agricultural land ecological security of Henan Province

On the base of existing research achievements and according to the integrity of the ecosystem and the practicality of evaluating results,this paper describes the division of evaluating units and evaluates the ecological security of Henan Province's agricultural land.Compared with the special characters of the ecological security evaluation of agricultural land,each of the existing evaluating methods used for the land evaluation has its shortcomings.This paper integrates the method of polyelement with the method of systematical polymerization,aided by the software of MAPGIS and SPSS to evaluate the ecological security of agriculture land of 18 evaluated units in Henan Province.The evaluating results reflect not only the difference among agriculture land of various levels,but also the obvious relationships among units at the same level on the condition of lack of evaluating units.