摘要
在对海南省胡椒主要种植区——文昌区和琼海区胡椒种植地土壤中重金属元素含量进行调查的基础上,运用单项污染指数法和内梅罗综合污染指数法,结合绿色食品产地环境技术条件及土壤环境质量二级标准,对其含量现状进行了评价。结果表明,文昌区中仅有东阁镇种植地区符合绿色食品产地环境技术条件要求,玄武岩风化的铁质砖红壤区及花岗岩风化的黄色砖红壤区的重金属元素污染因子主要为Cr、Ni,其次为Cu;琼海区只有长坡花岗岩及变质岩风化区两种植地土壤中Pb、As超标,其他母质类型的土壤均符合绿色食品产地环境技术条件要求。整体看,研究区胡椒种植地土壤中重金属元素含量受人为活动因素影响较小,母岩母质类型是造成土壤重金属含量高的重要原因。
According to the investigation of heavy metal contents in the soils of pepper fields in Wenchang and Qionghai, the two main pepper bases in Hainan Province, the status of heavy metal in the soils can be evaluated. The evaluation is made through adopting single-factor pollution index, Nemero synthesis pollution index and green food-technical conditions for environmental of area and the grade Ⅱ standard for soil environmental quality. The results indicate that Cr, Ni and Cu are the main heavy metal pollution factors in iron latosol weathered from basalt and yellow latosol weathered from granite in Wenchang studied area. Pb and As sub-standard exist in the two types of soils, which are weathered from Changpo granite and metamorphic rock in Qionghai studied area, the rest of which meet green food-technical conditions for environmental of area. Generally, concentrations of heavy metals in the soils of studied area are influenced not only by the impact of human activities but also by soil parent material types.
出处
《地质科技情报》
CAS
CSCD
北大核心
2007年第4期91-96,共6页
Geological Science and Technology Information
基金
中国地质调查局项目"海南岛优质农产品(胡椒
菠萝和茶叶)生态地球化学研究"(200414200010)
关键词
胡椒
土壤
成土母质
重金属
污染评价
pepper
soil
soil parent material
heavy metal
pollution evaluation
