Abstract：
Industrial hemp (Cannabis sativa L.) has great application potential in heavy metal-polluted soils owing to its safe non-food utilization. However, the fate of heavy metals in different varieties of hemp planted in strongly contaminated natural soils remains unknown. Here, we investigated the growth, heavy metal uptake, distribution, and transfer of nine hemp varieties in soils strongly contaminated with Cu, As, Cd, and Pb. Hemp variety and metal type were the main factors affecting the growth and heavy metal uptake in hemp. The nine hemp varieties grew well in the contaminated soils; however, differences existed among the varieties. The biomass of Z3 reached 5669.1 kg hm-1, whereas that of Yunma No. 1 was only 51.8 % of Z3. The plant height, stalk diameter, and stalk bark thickness of Z3 were greater than those of the other varieties, reaching 168 cm, 9.2 mm, and 0.56 mm, respectively. Permanova\'s analysis revealed that the total effects of Cu, As, Cd, and Pb on the growth of the nine hemp varieties reached 60 %, with leaf As having the greatest effect, reaching 16 %. , Even in strongly contaminated soils, the nine varieties showed poor Cu, As, Cd, and Pb uptake. Most of the Cu, As, Cd, and Pb were retained in the root, reaching 57.7-72.4, 47.6-64.7, 76.0-92.9, and 70.0-87.8 %, respectively. Overall, the Cu, As, Cd, and Pb uptake of Wanma No.1 was the highest among the nine varieties, whereas that of Guangxi Bama was the lowest. These results indicate that hemp is a viable alternative for phytoattenuation in soils contaminated with heavy metals because of its ability to tolerate and accumulate Cu, As, Cd, and Pb in its roots, and Guangxi Bama is superior to the other varieties considering the safe utilization of hemp products.
摘要：
工业大麻（CannabissativaL.）由于其安全的非食品利用，在重金属污染的土壤中具有巨大的应用潜力。然而,在严重污染的自然土壤中种植的不同品种大麻中重金属的命运仍然未知。这里,我们调查了增长，重金属吸收，分布，以及九种大麻品种在严重受铜污染的土壤中的转移，As,Cd,和Pb。大麻品种和金属类型是影响大麻生长和重金属吸收的主要因素。九种大麻品种在受污染的土壤中生长良好；然而，品种之间存在差异。Z3的生物量达到5669.1kghm-1，而云马号的生物量达到5669.1kghm-1。1只占Z3的51.8%。植物高度,茎直径,Z3的茎皮厚度大于其他品种，达到168厘米，9.2mm,和0.56毫米，分别。Permanova的分析表明，铜的总效应，As,Cd,而Pb对9个大麻品种的生长影响达到60%,叶子的影响最大，达到16%。,即使在严重污染的土壤中，这9个品种表现出不良的铜，As,Cd,和铅的吸收。大部分的铜，As,Cd,铅保留在根中，达到57.7-72.4、47.6-64.7、76.0-92.9和70.0-87.8%，分别。总的来说,铜，As,Cd,万马一号的铅吸收量在9个品种中最高，而广西巴马是最低的。这些结果表明，由于大麻具有耐受和积累Cu的能力，因此大麻是重金属污染土壤中植物减毒的可行替代品，As,Cd,和根部的铅，考虑到大麻产品的安全利用，广西巴马优于其他品种。
