广东省主流肥料质量与环境风险分析

Quality and Environmental Risk Assessment of the Fertilizers on the Market in Guangdong Province

为了调查当前广东省农资市场上主流肥料产品的分类、流通及质量现状,并评估其环境风险,笔者抽样调查了广东省市场流通中的常见肥料。调查结果显示,广东省肥料市场主流商品肥料养分合格率较高,达到了88.9%,其中进口肥料全部合格,且养分超量明显,但平均价格高于国产肥料约20%。复合肥料重金属含量普遍较低,没有超标现象。有机肥料类商品整体价位较高,有机质和水分含量全部达标,重金属超标率较低,仅为7.7%,养分配比差异较大。过磷酸钙和土壤改良剂类商品养分含量偏低,重金属含量偏高,是所有类别商品中品质最不稳定的类型。

In order to investigate the classified information, quality and environmental risk of the fertilizers onthe market in Guangdong Province. An investigation of fertilizer quality on the market in Guangdong Provincewas conducted. Results showed that： the pass rate reached 88.9% for all of the mainstream fertilizers andreached 100% for the imported fertilizers in the fertilizer market. The price of imported fertilizer was 20%higher than domestic fertilizer, and the actual nutrient content of imported fertilizers usually higher than thenominal value as usual. The contents of heavy metal of compound fertilizers were very low and within thenational standards. Though prices of organic fertilizers were relatively high, contents of organic matter andmoisture were all highly qualified. Furthermore, heavy metal exceeded rate of organic fertilizer was 7.7 %, andthe ratio of N/P/K was different. Calcium superphosphate and soil conditioner had lower nutrients and higherheavymetal contents widespreadly.