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Assessment of the potential for phytoremediation of cadmium polluted soils by various crop rotation patterns based on the annual input and output fluxes
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2021-09-12 , DOI: 10.1016/j.jhazmat.2021.127183
Yihao Yang 1 , Chenfeng Xiao 1 , Fan Wang 1 , Liang Peng 1 , Qingru Zeng 1 , Si Luo 1
Affiliation  

Phytoremediation potential of two oil crop rotations (oilseed sunflower–rape (O+Ra) and peanut–oilseed rape (P+Ra)) was compared with three conventional cropping patterns (rice–rape (R+Ra), rice–rice (R+R), single cropped rice (SR)) in experimental plots with cadmium (Cd)-contaminated soil. A new approach was used to evaluate phytoremediation potential based on the balance between annual input and output fluxes of Cd in farmland soil. In O+Ra and P+Ra rotations, 77.24 and 62.09 g/ha Cd were removed, respectively, whereas in R+Ra, R+R, and SR patterns, 41.79, 46.46, and 23.85 g/ha Cd were removed, respectively. The balance between inputs and outputs of Cd was − 40.72 and − 25.76 g/ha under O+Ra and P+Ra rotations, respectively. Available Cd content in topsoil was reduced by 5.58% and 3.91% under O+Ra and P+Ra rotations, respectively. Based on the balance between Cd inputs and outputs, phytoremediation efficiencies of O+Ra (1.23%) and P+Ra (0.78%) rotations were higher than those of R+R (0.29%), R+Ra (0.13%), and SR (− 0.38%) systems. Because crop removal is the main Cd output pathway, selection of a suitable crop is particularly important in remediation of Cd-contaminated farmland.



中文翻译:

基于年输入和输出通量的各种作物轮作模式对镉污染土壤的植物修复潜力评估

将两种油料作物轮作(油菜-油菜(O+Ra)和花生-油菜(P+Ra))的植物修复潜力与三种常规种植模式(水稻-油菜(R+Ra)、水稻-水稻(R +R), 单季稻 (SR)) 在受镉 (Cd) 污染的土壤的试验区中。基于农田土壤中 Cd 年输入和输出通量之间的平衡,采用一种新方法评估植物修复潜力。在 O+Ra 和 P+Ra 轮换中,分别去除了 77.24 和 62.09 g/ha Cd,而在 R+Ra、R+R 和 SR 模式中,分别去除了 41.79、46.46 和 23.85 g/ha Cd . 在 O+Ra 和 P+Ra 旋转下,Cd 的输入和输出之间的平衡分别为 - 40.72 和 - 25.76 g/ha。在 O+Ra 和 P+Ra 轮作下,表层土壤有效 Cd 含量分别降低了 5.58% 和 3.91%。 0.38%) 系统。由于作物去除是镉的主要输出途径,因此选择合适的作物对于镉污染农田的修复尤为重要。

更新日期:2021-09-16
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