Department of Agrotechnology and Agribusiness, Faculty of Agriculture and Forestry, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland.
Department of Agricultural and Environmental Chemistry, Faculty of Agriculture and Forestry, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland.
Int J Environ Res Public Health. 2022 Oct 20;19(20):13627. doi: 10.3390/ijerph192013627.
Polycyclic aromatic hydrocarbons (PAHs) are mainly accumulated in soil. Plants secrete enzymes that transform or biodegrade PAHs in soil. Some plant species are more effective in stimulating the biodegradation of these pollutants than other species. This study was undertaken to evaluate the influence of crop rotation on PAH concentrations in soil. Four crops were grown in rotation: sugar beets, spring barley, maize, and spring wheat. Soil samples for the study were obtained from a long-term field experiment established in 1986 in Bałcyny, Poland. The concentrations of PAHs were analyzed in soil samples gathered over a period of 12 years (1998-2009). An attempt was made to evaluate the effect of crop rotation (sugar beets, spring barley, maize, and spring wheat) on PAH concentrations in soil. The content of PAHs in soil samples was measured by gas chromatography with flame ionization detection. Data were processed statistically by repeated measures ANOVA. The concentrations of ∑16 PAHs were lowest in soil after sugar beet cultivation, and highest in soil after maize cultivation. It can be concluded that maize was the plant with the greatest adverse effect on the content of heavy PAH in the soil, a completely different effect can be attributed to spring wheat, which has always been shown to reduce the content of heavy PAH in the soil. Weather conditions affected PAHs levels in soil, and PAH content was highest in soil samples collected in a year with the driest growing season. This arrangement suggests a greater influence of weather conditions than of the cultivated plant.
多环芳烃（PAHs）主要在土壤中积累。植物分泌的酶可以转化或生物降解土壤中的 PAHs。某些植物物种比其他物种更有效地刺激这些污染物的生物降解。本研究旨在评估轮作对土壤中 PAH 浓度的影响。四种作物轮作：甜菜、春大麦、玉米和春小麦。研究用土壤样品取自波兰巴尔钦于 1986 年建立的长期田间试验。在 12 年（1998-2009 年）的时间内采集土壤样本分析 PAHs 浓度。试图评估轮作（甜菜、春大麦、玉米和春小麦）对土壤中 PAH 浓度的影响。土壤样品中的 PAH 含量通过气相色谱法（火焰离子化检测）进行测量。数据通过重复测量方差分析进行统计处理。土壤中∑16PAHs 的浓度在甜菜种植后最低，在玉米种植后最高。可以得出结论，玉米是对土壤中重质 PAH 含量影响最大的植物，而春小麦则完全不同，它始终显示出降低土壤中重质 PAH 含量的作用。天气条件影响土壤中的 PAHs 水平，在生长季节最干燥的一年采集的土壤样本中 PAH 含量最高。这种安排表明，天气条件的影响大于种植植物的影响。
