Sun Qinghong, Zhang Yuxin, Ming Chenshu, Wang Jianmin, Zhang Ying
College of Resources and Environment, South China Agricultural University, Guangzhou 510642, PR China; School of Resource and Environment, Northeast Agricultural University, Harbin, China.
School of Resource and Environment, Northeast Agricultural University, Harbin, China.
J Environ Manage. 2023 Jun 15;336:117674. doi: 10.1016/j.jenvman.2023.117674. Epub 2023 Mar 7.
With the development of the social economy, soil heavy metal pollution has become a common worldwide issue. Therefore, the remediation of soil heavy metal pollution is imminent. This study aimed to investigate the effect of amended compost on reducing heavy metal bioavailability in soil and relieving heavy metals stress on plants under Cu and Zn stress in a pot experiment. To model the restoration of heavy metal-polluted farming soil, conventional compost (CKw), activated carbon compost (ACw), modified biochar compost (BCw) and rhamnolipid compost (RLw) were utilized. The results showed that the application of amended compost could promote the growth and quality of pakchoi and enhance the stress ability of malondialdehyde and antioxidant enzymes to heavy metals. The distribution of Cu and Zn in different subcellular parts of pakchoi was also affected. The application of amended compost significantly reduced the heavy metals content in the shoot of pakchoi, among which the content of Cu and Zn in the shoot of pakchoi in RLw was significantly decreased by 57.29% and 60.07%, respectively. Our results can provide a new understanding for efficient remediation of contaminated farmland soil by multiple heavy metals.
随着社会经济的发展，土壤重金属污染已成为一个全球性的普遍问题。因此，土壤重金属污染的修复迫在眉睫。本研究旨在通过盆栽试验，探究改良堆肥对降低土壤中重金属生物有效性以及缓解铜和锌胁迫下植物重金属胁迫的影响。为模拟重金属污染农田土壤的修复，使用了常规堆肥（CKw）、活性炭堆肥（ACw）、改性生物炭堆肥（BCw）和鼠李糖脂堆肥（RLw）。结果表明，施用改良堆肥可促进小白菜的生长和品质提升，增强丙二醛和抗氧化酶对重金属的胁迫能力。小白菜不同亚细胞部位铜和锌的分布也受到影响。施用改良堆肥显著降低了小白菜地上部的重金属含量，其中RLw处理下小白菜地上部铜和锌的含量分别显著降低了57.29%和60.07%。我们的研究结果可为多种重金属污染农田土壤的高效修复提供新的认识。
