种植八宝景天对污染土壤径流中镉浓度的影响

王晟; 何洁; 刘志宗; 刘奇; 陈亚俊; 张乃明

doi:10.13205/j.hjgc.202308021

种植八宝景天对污染土壤径流中镉浓度的影响

doi: 10.13205/j.hjgc.202308021

王晟^1,2,
何洁^3,2,
刘志宗^3,2,
刘奇^3,2,
陈亚俊^3,2,
张乃明^3,2, ,

1. 云南农业大学植物保护学院, 昆明 650201;
2. 云南农业大学资源与环境学院, 昆明 650201;
3. 云南省土壤培肥与污染修复工程实验室, 昆明 650201

基金项目:

“NSFC-云南联合基金”重点项目(U2002210)

详细信息

作者简介:
王晟(1994-),男,博士研究生,主要从事农业面源污染、土壤重金属污染修复研究。wangshengYNU@163.com

通讯作者:
张乃明(1963-),男,教授,主要从事农业面源污染、土壤重金属污染修复研究。zhangnaiming@sina.com

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出版历程
- 收稿日期: 2022-09-27
- 网络出版日期: 2023-11-15

EFFECT OF PLANTING SEDUM SPECTABILE ON CADMIUM CONCENTRATION IN CONTAMINATED SOIL RUNOFF

WANG Sheng^1,2,
HE Jie^3,2,
LIU Zhizong^3,2,
LIU Qi^3,2,
CHEN Yajun^3,2,
ZHANG Naiming^{3,2
, ,}

1. College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China;
2. College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China;
3. Yunnan Soil Fertility and Pollution Remediation Engineering Laboratory, Kunming 650201, China

摘要

摘要: 为探究镉(Cd)富集植物八宝景天(Sedum spectabile)对污染土壤Cd径流流失的影响,以不同Cd污染程度土壤作为实验材料,采用人工模拟降雨方法,设置不同降雨强度和坡度,研究种植八宝景天前、后污染土壤径流Cd浓度的差异性及影响因素。结果表明:种植八宝景天120 d后,原Cd含量为低[(7.43±0.01) mg/kg]、中[(42.23±0.05) mg/kg]、高[(94.20±0.21) mg/kg]3种污染程度土壤全量Cd的降幅分别为31.90%、20.91%和17.52%,有效态Cd降幅分别为14.36%、21.20%和21.81%,表明八宝景天具备修复Cd污染土壤的潜力。降雨强度与3种污染程度土壤径流Cd浓度呈极显著正相关(P＜0.01),且土壤Cd径流流失负荷随着降雨强度或污染程度的增大而升高,在本实验设置坡度中,18°坡度时土壤Cd径流流失风险最大;八宝景天种植时间与低污染、中污染土壤径流Cd浓度呈显著负相关(P＜0.05),且种植八宝景天与未种植八宝景天的土壤径流Cd浓度呈显著性差异(P＜0.05),表明种植八宝景天可有效降低污染土壤中Cd的径流流失风险。
- 八宝景天 /
- 污染土壤 /
- 径流 /
- Cd浓度 /
- 环境风险
Abstract: In order to explore the effect of cadmium enriching plant, Sedum spectabile on Cd runoff loss from contaminated soil, soil with different levels of Cd pollution was used as the test materials, and artificial rainfall simulation method was used to set up different rainfall intensity and slope, to study the difference in Cd concentration in contaminated soil runoff before and after planting Sedum spectabile and the influencing factors. The results showed that after 120 days of planting Sedum spectabile, the original total Cd concentration in soil with low [(7.43±0.01) mg/kg], medium [(42.23±0.05) mg/kg] and high [(94.20±0.21) mg/kg] pollution levels decreased by 31.90%, 20.91% and 17.52% respectively, and the available Cd concentration decreased by 14.36%, 21.20% and 21.81% respectively, indicating that Sedum spectabile has the potential to repair Cd contaminated soil. The rainfall intensity was significantly positively correlated with the Cd concentration in soil runoff at three pollution levels (P<0.01); the planting time of Sedum spectabile was significantly negatively correlated with the Cd concentration in low and medium pollution soil runoff (P<0.05), and the Cd concentration in soil runoff with and without Sedum spectabile was significantly different (P<0.05), indicating that planting Sedum spectabile can effectively reduce the risk of runoff loss of Cd in contaminated soil.
- Sedum spectabile /
- contaminated soil /
- runoff /
- Cd concentration /
- environmental risk

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