The aim of this study was to evaluate the ability of three hemp cultivars to accumulate heavy metals under sewage sludge (SS) and phosphogypsum (PG) application. The field study was carried out from 2014 to 2016 on Luvisol (loamy sand) in Poland. The experiment scheme included five treatments—T0: the control without fertilization, T1: 170 kg N (nitrogen) ha⁻¹ from sewage sludge, T2: 170 kg N ha⁻¹ from sewage sludge and 100 kg ha⁻¹ of phosphogypsum, T3: 170 kg N ha⁻¹ from sewage sludge and 500 kg ha⁻¹ of phosphogypsum, and T4: 170 kg N ha⁻¹ from sewage sludge and 1000 kg ha⁻¹ of phosphogypsum. It was found that the application of municipal sewage sludge enriched the soil with the bioavailable forms of heavy metals to the greatest extent and contributed to the highest increase in their contents in vegetative and generative organs of hemp plants. These parameters showed a phosphogypsum dose-dependent decline, which could hinder the phytoextraction process. The greatest extractions of heavy metal(loid)s (HMs) from the soil treated with SS and PG were achieved by the Tygra variety, which had the highest bioconcentration factor (BCF) and biomass yield.

中文翻译：

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野外条件下城市污水污泥和磷石膏中的大麻基重金属累积

这项研究的目的是评估三个大麻品种在污水污泥（SS）和磷石膏（PG）施用下积累重金属的能力。现场研究于2014年至2016年在波兰的Luvisol（壤质砂）上进行。该实验方案包括五个处理-T0：不施肥的控制下，T1：170千克氮（氮）公顷^-1从污水污泥，T2：170千克氮公顷^-1从污水污泥和100公斤公顷^-1磷石膏，T3 ：来自污水污泥的170 kg N ha ^-1和500 kg ha ^-1的磷石膏，和T4：来自污水污泥的170 kg N ha ^-1和1000 kg ha ^-1的磷石膏。研究发现，城市污水污泥的应用最大程度地利用了生物可利用的重金属富集了土壤，并促进了大麻植物营养器官和生殖器官中其含量的增加。这些参数显示磷石膏剂量依赖性下降，这可能会阻碍植物的提取过程。Tygra品种从SS和PG处理过的土壤中最大程度地提取了重金属（HMs），其生物富集因子（BCF）和生物量最高。