肥料中重金属含量及其对干旱灌溉农区玉米吸收累积的影响

Contents of Heavy Metals in Fertilizers and Their Accumulation in Corn Under Arid Agriculture with Irrigation

对干旱灌溉农区市售磷肥和复合肥中重金属Pb、Cd、As含量及其对玉米籽粒中含量影响进行了研究,结果表明:目前市售磷肥和复合肥中重金属含量差异很大,个别产品已超过了标准;施用不同种类磷肥对玉米籽粒中Pb、As含量影响很大;不同玉米品种对磷肥中Pb、As吸收累积程度不同、差异显著,且同一品种对Pb、As吸收累积能力也有显著差异。

We have analyzed selected heavy metals including Pb, Cd, As in several commercial fertilizers purchased. In the meantime, we probed the pollution of the heavy metals in com grown in arid agriculture under irrigation. The results showed that contents of the heavy metals in the fertilizer samples were of very diverse and the contents of heavy metals in a few samples even exceeded official standard. It has been found that there was a great effect of application of various fertilizers on the contents of Pb and As in grain samples. Accumulation of the heavy metals Pb and As by corn variety was changeable, even by an identical variety.