National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, China.
Shandong Provincial Engineering Laboratory for Soil Geochemistry, Shandong Provincial Engineering Research Center for Geological Prospecting, Shandong Institute of Geophysical and Geochemical Exploration, Jinan, 250013, Shandong, China.
Environ Geochem Health. 2022 Aug;44(8):2669-2684. doi: 10.1007/s10653-021-01069-9. Epub 2021 Aug 16.
Winter-wheat-summer-maize rotations are important cropping patterns in China, and the quality of the food produced from these systems can affect human health. However, the effects of heavy metal pollution on both crops remain unclear. We analyzed soil-wheat and soil-maize samples from eastern China for their Cd, Cu, Zn, Cr, Ni, and Pb contents. The concentrations of these metals in the soils analyzed were found to be lower than those recommended by the national guidelines, but the Cd, Cr, Cu, and Ni concentrations were higher than the natural soil background values in China. Quality indices showed that subpollution was predominant in wheat/maize (95.00%/81.25%) samples. Positive matrix factorization model data revealed that the contributions from natural sources, agricultural activities, and traffic to the heavy metal pollution levels were 30.40-43.07%, 34.67-26.63%, and 34.92-30.27%, respectively, in the wheat-maize rotations. Although the health hazard quotient values for wheat were higher than those for maize, there were no health risks for children or adults.
冬小麦-夏玉米轮作是中国重要的种植模式，这些系统生产的食物的质量会影响人类健康。然而，重金属污染对这两种作物的影响仍不清楚。我们分析了来自中国东部的土壤-小麦和土壤-玉米样本，以检测其 Cd、Cu、Zn、Cr、Ni 和 Pb 含量。分析的土壤中这些金属的浓度低于国家指南推荐的浓度，但 Cd、Cr、Cu 和 Ni 的浓度高于中国的自然土壤背景值。质量指数显示，小麦/玉米（95.00%/81.25%）样本中以轻度污染为主。正矩阵因子模型数据显示，在小麦-玉米轮作中，重金属污染水平分别有 30.40-43.07%、34.67-26.63%和 34.92-30.27%来自自然来源、农业活动和交通。尽管小麦的健康危害商数值高于玉米，但儿童或成人没有健康风险。
