成都经济区土壤质量地球化学评估

Soil Quality Geochemical Evaluation of Chengdu Economic Area

通过对成都经济区土壤重金属元素和有益元素含量高低的测定,参照相关国家或行业标准,根据土壤环境质量、土壤养分质量进行地球化学分等,最终进行土壤质量地球化学评价。结果表明:成都经济区土壤质量以Ⅲ、Ⅳ等为主,占调查面积的56.05%左右,土壤较清洁,养分较高,适宜农业生产;其次是Ⅴ、Ⅵ等,占总面积的39.02%左右,土壤存在不同程度的重金属污染现象,养分低,应加强管理;Ⅰ、Ⅱ等土壤面积仅占4.95%,是发展有机、无公害农业的理想区域,应注意强化保护和合理利用。

Through testing heavy metal elements＇ and useful elements＇ content in soil of Chengdu Economic Area,this paper,referring to relative national or industrial standard,carried through geochemical gradation based on soil environmental quality and nutrient quality,and finally evaluated the soil quality from geochemistry.The results indicated as follows： the soil quality of Chengdu Economic Area mainly belonged to the third and fourth grade,taking up 56.05% of the survey area.Such soil was comparatively clean and with relatively enough nutrients,suitable for agricultural producing.The next was soil of the fifth and sixth grade quality,accounting for 39.02% of the whole area.Such soil was polluted in different degree and was of few nutrients,so required more management.The area of soil of the first and second grade quality accounted for only 4.95%.Such soil was ideal for developing green or pollution-free agriculture,and should be protected and utilized reasonably.