基于根伸长的典型叶类蔬菜Se生态风险  

Ecological risk of Se in typical leafy vegetables based on root elongation

作　　者：张忠恩 李湘凌[1,2] 赵燕 吴安云 卢新哲 魏迎春 ZHANG Zhongen;LI Xiangling;ZHAO Yan;WU Anyun;LU Xinzhe;WEI Yingchun(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Province Engineering Research Center for Mineral Resources and Mine Environments,Hefei 230009,China;Technology Innovation Center of Ecological Evaluation and Remediation of Agricultural Land in Plain Area,Ministry of Natural Resources,Hangzhou 311203,China;Zhejiang Institute of Geological Survey,Hangzhou 311203,China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]安徽省矿产资源与矿山环境工程技术研究中心,安徽合肥230009 [3]自然资源部平原区农用地生态评价与修复工程技术创新中心,浙江杭州311203 [4]浙江省地质调查院,浙江杭州311203

出　　处：《合肥工业大学学报(自然科学版)》2025年第3期369-375,394,共8页Journal of Hefei University of Technology:Natural Science

基　　金：浙江省重点研发计划资助项目(2021C04020);浙江省自然资源厅科技资助项目(2020-45)和浙江省地勘资金资助项目(2019007)。

摘　　要：为探究硒(Se)对叶类蔬菜的毒性效应,文章通过水培实验,以18种典型叶类蔬菜萌发期的相对根伸长(relative root elongation,RRE)作为评测终点,采用Log-logistic、Hormesis模型确定典型叶类蔬菜的EC_(20)、EC_(50),基于Burr-Ⅲ模型分析18种蔬菜Se敏感性差异并计算最大环境有害浓度(hazardous concentration for 5%of species,HC 5)。结果表明:部分蔬菜无Se兴奋效应,部分蔬菜具有Se兴奋效应,兴奋效应质量浓度范围为0.1~5.0 mg/L,Se对蔬菜RRE的兴奋效应和毒害性与蔬菜种类密切相关;品种大白菜中白(DBCZ)、生菜孔雀菜(SCKQ)和空心菜竹叶(KXCZ)表现出较强的Se耐性,而品种茼蒿板叶(THBY)、茼蒿圆叶(THYY)和苋菜圆叶(XCYY)表现出较强的敏感性。不同蔬菜的Se毒性阈值差异明显,EC_(20)和EC_(50)范围分别为0.48~10.59 mg/L和1.88~19.60 mg/L;兴奋效应显著影响蔬菜的剂量-效应关系,Se兴奋效应组的模型参数(最大与最小RRE差值a、毒害性变化速率b、EC_(20)和EC 50)平均值显著大于无兴奋效应组;保护95%蔬菜的20%效应毒性阈值(HC_(5)^(20))和50%效应毒性阈值(HC_(5)^(50))分别为0.29、1.20 mg/L,蔬菜种类对HC 5影响极大,敏感性品种缺失会导致HC_(5)显著提高,耐性品种缺失会一定程度上降低HC_(5)。To explore the toxic effect of selenium(Se)on leafy vegetables,the toxicity thresholds EC 20 and EC 50 of 18 typical leafy vegetables were determined using Log-logistic and Hormesis models through a hydroponic experiment with their relative root elongation(RRE)during seed germination as test endpoint.Based on the Burr-Ⅲmodel,the sensitivity differences of the 18 vegetables to Se were analyzed and hazardous concentration for 5%of species(HC 5)was calculated.The results showed that some vegetables had no excitatory effect of Se,while some vegetables presented an excitatory effect of Se,with a concentration range of 0.1-5.0 mg/L.The excitatory effect and toxicity of Se on the RRE of vegetables were closely related to vegetable species.The cultivars DBCZ,SCKQ and KXCZ were highly Se-tolerant,while THBY,THYY and XCYY were highly Se-sensitive.The Se toxicity thresholds of different vegetables were significantly different,with EC_(20)and EC_(50)ranging from 0.48 mg/L to 10.59 mg/L and 1.88 mg/L to 19.60 mg/L,respectively.The excitatory effect significantly affected the dose-effect relationship of vegetables.The averages of model parameters,including the difference between the maximum and minimum values of RRE(a),the rate of toxic change(b),EC_(20)and EC_(50),in the excitatory effect group were significantly higher than those in the non-excitatory effect group.The 20%toxicity threshold(HC_(5)^(20))and 50%toxicity threshold(HC_(5)^(50))protecting 95%vegetables were 0.29 mg/L and 1.20 mg/L,respectively.Vegetable species had a great impact on HC_(5).The lack of sensitive species would lead to a significant increase in HC_(5),while the lack of tolerant species would reduce HC _(5) to a certain extent.

关 键 词：硒 物种敏感性分布 毒性阈值 叶类蔬菜 

分 类 号：X592[环境科学与工程—环境工程]