| Autor: |
Wang, Dong, Zhu, ShouJing, Lu, YanWei, Zeng, Rui, Hu, ZhiXin, Li, Xiang, Jie, YuCheng |
| Zdroj: |
Agronomy Journal; March 2021, Vol. 113 Issue: 2 p923-931, 9p |
| Abstrakt: |
This study aimed to analyze the heavy metal absorption characteristics of different plant species and planting patterns on lead (Pb) and arsenic (As) levels in soil. Two ramie [Boehmeria nivea(L.) Guad.] varieties (Zhongzhu‐1 and Xiangzhu‐3), and Pteris vittataL. were cultivated in monoculture and intercropping patterns in soil polluted with heavy metals (Pb and As). The plant traits and biomasses of Zhongzhu‐1 and Xiangzhu‐3 intercropped with P. vittataat a high density were not significantly different compared to their individual monoculture treatments. Meanwhile, the biomass of P. vittataintercropped with ramie was significantly reduced. In addition, the Pb content and Pb accumulation in shoots of Zhongzhu‐1 and Xiangzhu‐3 intercropped with P. vittataat high density significantly increased compared with the Pb content and Pb accumulation from monoculture shoots. The Xiangzhu‐3/P. vittatahigh density intercropping system had the highest Pb extraction at 232.14 g hm−2and a Pb extraction efficiency of 0.0222%. The P. vittatamonoculture system had the highest As extraction with 225.87 g hm−2and an As extraction efficiency of 0.2765%. Moreover, ramie and P. vittataintercropping at high density was the most efficacious planting method for minimizing Pb–As pollution in soil with higher and effective remediation efficiency and economic benefit than monoculture planting system. |
| Databáze: |
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