Comprehensive evaluation of heavy metal for agricultural environmental soil land
1.College of Computer Science and Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China; 2.Key Laboratory for Modern Precision Agriculture System Integration Research, Ministry of Education, China Agricultural University, Beijing 100083, China
Abstract：The comprehensive evaluation method of heavy metal for pollution agricultural environmental soil land was investigated. The criterion of heavy metal comprehensive evaluation was established based on the heavy metal elements of Pb, Cd, Cu, Cr, Zn and similar heavy metal of As. The corrected fuzzy comprehensive evaluation model with ecological toxicity and health factor was proposed with high resolution and efficiency. The comparison evaluation of 47 delineations of soil for farmlands was conducted. The assessment results show that there are 33 uncontaminated grade polygon plots， and other 14 patterns appear under the state of second pollution stage. The heavy metal pollution plots account for 29.8% with total land area ratio of 32.1%. The land classification level is proportional to heavy metal pollution stage.The proposed comprehensive evaluation of heavy metal is suitable for agricultural environmental soil land.
2014, Vol. 35 
