崇左市边远山区优质稻重金属含量与污染评价

Heavy Metal Content and Pollution Evaluation of High-quality Rice in Remote Mountainous Areas of Chongzuo City

以乐久村为研究对象,开展特色农产品中重金属的污染状况调查并对其污染源进行评价。采集当地种植点的水稻和土壤共39个样本,同时采集灌溉水源水样7个,进行重金属检测,采用单因子污染指数法和内梅罗综合污染指数法进行污染评价,同时对污染源进行分析。结果表明:水稻、土壤检测结果为清洁无污染水平,综合污染指数均小于0.7,稻米处于安全无污染水平。土壤和灌溉水中的重金属含量在限量标准内,其综合污染指数小于0.7,为清洁无污染水平,适合生产发展安全优质水稻。水稻重金属含量与土壤、灌溉水中重金属含量之间的相关性不显著。

This paper took Lejiu Village as the research object,conducted a survey on the pollution status of heavy metal in special agricultural products and evaluated its pollution sources.A total of 39 samples of rice and soil were collected from local planting sites,and 7 samples of irrigation water sources were collected for heavy metal detection.The single factor pollution index method and the Nemeiro comprehensive pollution index method were used for pollution evaluation,and pollution sources were analyzed at the same time.The results showed that the test results of rice and soil were clean and pollution-free,and the comprehensive pollution index was less than 0.7,and the rice was at a safe and pollution-free level.The heavy metal content in soil and irrigation water was within the limit standard,and its comprehensive pollution index was less than 0.7,which was a clean and pollution-free level,suitable for the production and development of safe and high-quality rice.The correlation between the heavy metal content of rice and the heavy metal content of soil and irrigation water was not significant.