| 杨肖松,刘月仙,解小凡,张萌,王伟.基于物种敏感性分布法预测芘对白菜毒害的生态风险阈值[J].农业环境科学学报,2018,37(10):2127-2134. |
| 基于物种敏感性分布法预测芘对白菜毒害的生态风险阈值 |
| Ecological hazard concentration of pyrene to Chinese cabbage based on species sensitivity distribution |
| 投稿时间：2018-02-25 |
| DOI：10.11654/jaes.2018-0235 |
| 中文关键词: 芘 白菜 物种敏感性分布 剂量-效应 生态风险阈值 |
| 英文关键词: pyrene Chinese cabbage species sensitivity distribution dose response ecological hazard concentration |
| 基金项目:国家重点研发计划项目（2016YF0503604） |
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| 摘要点击次数: 1910 |
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| 中文摘要: |
| 为预测芘对白菜的生态风险阈值，通过温室土培试验，研究华北地区11个常见白菜品种对芘毒性的剂量-效应关系，得出基于白菜鲜质量芘的毒性阈值EC10（10%抑制浓度）与EC50（50%抑制浓度）。运用物种敏感性分布法（Species Sensitivity Distribution，SSD）预测芘对白菜的生态风险阈值HC5。结果表明：京翠60（JC-60）、京秋65（JQ-65）两个品种生物量（鲜质量）随着芘添加浓度的增加逐渐降低，呈现抑制效果，京春娃2号（JCW-2）、京春白（JCB）等9个品种白菜生物量随芘添加浓度的增加，呈现先升高后降低的趋势；运用Log-logistic分布模型以及Brian-Cousens低剂量刺激模型对土壤中芘植物毒性的剂量-效应关系进行拟合，得出不同条件下芘对白菜毒性的剂量阈值（EC10、EC50），多环芳烃芘对白菜EC10变化范围为4.14~52.76 mg·kg-1，EC50变化范围为28.35~545.11 mg·kg-1；通过物种敏感性分布模型预测结果表明，基于保护95%白菜品种的EC10值HC510%为4.52 mg·kg-1，置信区间为2.02~10.04，EC50值HC550%为37.68 mg·kg-1，置信区间为24.99~56.79。 |
| 英文摘要: |
| Hazardous aromatic pollutants, such as polycyclic aromatic hydrocarbons (PAHs) have received increased attention in recent years owing to their teratogenic and carcinogenic properties. However, analysis of the PAH concentrations that are hazardous to crops is insufficient for assessing the risks of PAHs to farmland. To predict the ecological hazard concentration (HC5) of pyrene to Chinese cabbage, a pot experiment was conducted to investigate the dose responses to pyrene of 11 Chinese cabbage cultivars. The results showed that the biomass (fresh weight) of two of the cabbage cultivars (JC-60 and JQ-65) decreased with increasing application rates of pyrene, whereas the biomass (fresh weight) of the other nine Chinese cabbage cultivars increased with low pyrene application rates and then decreased as the pyrene application rate increased further. Different models (i.e., log-logistic and Brian-Cousens) were used to derive the effective concentrations of 10% response and 50% response (EC10 and EC50 respectively) based on the biomass of the 11 cabbage cultivars. The EC10 of pyrene for cabbage ranged from 4.14 mg·kg-1 to 52.76 mg·kg-1, and the EC50 from 28.35 mg·kg-1 to 545.11 mg·kg-1. The ecological hazard concentration for 5% of the cultivars was derived based on the EC10 and EC50 by employing a species sensitivity distribution (SSD) approach. The HC510% of pyrene at a 10% inhibition concentration was 4.52 mg·kg-1, with a confidence interval of 2.02~10.04, and the HC550% was 37.68 mg·kg-1, with a confidence interval of 24.99~56.79. |
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