目录
摘要Ⅰ
关键词Ⅰ
ABSTRACTⅡ
KEY WORDSⅡ
引言
1材料与方法1
1.1数据收集与整理 1
1.2研究方法 1
2结果与分析3
2.1全国农田土壤重金属镉含量概况3
2.2各省份农田土壤镉污染情况5
2.3各地区农田土壤镉含量评价6
2.4农田土壤镉污染来源分析7
3讨论与结论 9
致谢9
参考文献11
全国农田土壤重金属镉含量统计调研
摘 要
近年我国农田重金属污染问题日益严峻，而镉是主要的重金属污染毒物之一，农田环境一旦遭受镉的污染，很难完全修复。本文通过汇总国内近20年来与农田重金属镉污染相关的百余篇文献，将收集到的文献中筛选出中国各地农田镉污染数据，获取率共计430个数据样本。进行地区划分及统计分析，样点分布在全国34个省级行政区，包括23个省，5个自治区，4个直辖市，2个特别行政区，几乎涵盖了整个中国大陆地区。其中香港，澳门，台湾地区样本数各位1个，统计不具有代表性。统计结果显示，七大区域农田土壤镉浓度水平高低为：华中地区（1.044mg/kg）＞华东地区（0.613mg/kg）＞华南地区（0.447mg/kg）＞东北地区（0.439mg/kg）＞西南地区（0.423mg/kg）＞西北地区（0.336 mg/kg）＞华北地区（0.241mg/kg），整体污染严重的省份有湖南，湖北，河南，浙江，江苏，江西，甘肃，辽宁，吉林等省，并分述各省镉污染情况。同时，分析阐述农田镉污染的来源，指出我国须要加大对农田重金属镉污染的防控与检测。研究成果可成为全国土壤污染状况调查的重要补充,可以促进区域土壤、环境相关研究的开展，为全面了解我国农田土壤重金属镉污染现状以及防控措施提供参考依据。
NATIONAL FIELD SURVEY OF HEAVY METAL CADMIUM IN FARMLAND SOILF
ABSTRACT
In recent years, the problem of heavy metal pollut *51今日免费论文网|www.51jrft.com +Q: ^351916072# 
ion in farmland in China has become increasingly serious, and cadmium is one of its main environmental pollution poisons. Once the farmland environment suffers from cadmium pollution, it is difficult to eliminate it. This paper summarizes more than 100 articles related to heavy metal cadmium pollution in farmland in the past 20 years, and selects 430 data samples from the collected documents to select farmland cadmium pollution data across China.Regional division and statistical analysis were conducted. The samples were distributed in 34 provinciallevel administrative regions of the country, including 23 provinces, 5 autonomous regions, 4 municipalities, and 2 special administrative regions, covering almost the entire mainland of China. Among them, Hong Kong, Macau, and Taiwan have one sample, and the statistics are not representative. The statistical results show that the levels of cadmium in farmland soil in the seven regions are: Central China (1.044mg/kg)> East China(0.613mg/kg)> South China(0.447mg/kg)> Northeast China(0.439mg/kg)＞ Southwest China(0.423mg/kg)＞ Northwest China(0.336mg/kg)＞ North China(0.241mg/kg), the provinces with serious pollution are Hunan, Hubei, Henan, Zhejiang, Jiangsu, Jiangxi, Gansu, Liaoning, Jilin and other provinces, and give a detailed description of the cadmium pollution in each province. At the same time, the sources of cadmium pollution in farmland are analyzed and explained, and it is pointed out that China needs to increase the prevention and detection of heavy metal cadmium pollution in farmland. The research results can be an important supplement to the national soil pollution survey, and can promote the development of regional soil and environmental research, and provide a reference for comprehensive understanding of the current status of farmland soil heavy metal cadmium pollution and prevention and control measures.

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