广西常用无机肥料中5种有害元素含量调查分析

Investigation and analysis on the contents of five harmful elements in common inorganic fertilizers in Guangxi

调查广西常用无机肥料中重金属含量情况,为控制土壤重金属污染,科学施用肥料,保障农产品质量安全提供数据支撑。对广西14个地市的424个无机肥料样品5种有害元素含量进行检测,检测结果根据GB 38400-2019《肥料中有毒有害物质的限量要求》的要求进行分析。结果表明,常用无机肥料中5种有害元素总体超标率为7.1%。其中,氮肥超标率为11.6%,磷肥6.2%、钾肥6.8%、复混肥料5.4%。铅、镉、砷、铬、汞5种有害元素超标率分别为0.5%、1.2%、2.1%、0.2%、3.1%。由调查情况可以看出,广西农业常用的无机肥料5种有害元素超标情况与有机肥料产品相比并不高,但由于有害元素具有累积特性,仍会影响农产品质量安全,应引起重视。

The heavy metal content in commonly used inorganic fertilizers in Guangxi was investigated to provide data support for soil heavy metal pollution control and scientific fertilizer application,and ensuring the quality and safety of agricultural products.424 inorganic fertilizer samples from 14 cities in Guangxi were tested for five harmful elements.The test results were analyzed in accordance with the requirements of GB 38400-2019“Limitation requirements of toxic and harmful substance in fertilizers”.The results showed that the overall excess rate of five harmful elements in commonly used inorganic fertilizers was 7.1%.Among them,the excess rates of nitrogen fertilizer,phosphate fertilizer,potash fertilizer,and compound fertilizer were 11.6%,6.2%,6.8%and 5.4%,respectively.The exceeding rates of the five harmful elements of lead,cadmium,arsenic,chromium and mercury were 0.5%,1.2%,2.1%,0.2%and 3.1%,respectively.From the survey,the excessive levels of five harmful elements of inorganic fertilizers commonly used in agriculture in Guangxi are not high compared with organic fertilizer products,but due to the cumulative characteristics of harmful elements,it will still affect the quality and safety of agricultural products and should be paid attention to.