寒旱农业科学2024，Vol.3Issue(5)：445-450,6.DOI:10.3969/j.issn.2097-2172.2024.05.011
不同砷水平下小麦砷迁移累积特征及健康风险评价
Characteristics of Arsenic Migration and Accumulation in Wheats under Different Arsenic Levels and Its Health Risk Assessment
摘要
Abstract
This study explored the growth,development,and arsenic(As)migration and accumulation characteristics of wheat in soils with different As concentrations to assess the health risks associated with wheat grains under varying levels of As stress and to propose a critical value for soil As contamination that is practical for wheat production in Gansu Province.Using anthropogenic-alluvial soil and Ningchun 4 variety of spring wheat as indicators,and referencing the soil As risk screening values from the'Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land(Trial)'(GB 15618-2018),7 concentration gradients were set from 0 to 3 times the soil quality standard As content for a soil-wheat system toxicity pot experiment.The results showed that As content in the roots,stems,and grains of wheat increased with soil As concentration,with the highest to lowest As content in the plant parts being roots,stems,and grains,respectively.The ability of different wheat parts to accumulate As was in the order:roots＞stems＞grains,with the accumulation capacity in roots and stems initially increasing and then decreasing with soil As concentration.The transfer coefficients(TF)for As in wheat plants were highest from roots to stems(TF stems/roots)followed by grains to stems(TF grains/stems)and grains to roots(TF grains/roots).Using adults in Gansu Province as the assessment subject and employing a human health risk assessment model with the Target Hazard Quotient(THQ)method,it was found that except for the control without added As2O5,the THQ values for all other As-stressed treatments exceeded the USEPA's recommended maximum acceptable risk threshold(THQ＞1.00),with a trend of initially increasing and then decreasing with rising soil As content.Based on local dietary habits and the human health risk assessment model,it is recommended that the safe production soil As concentration for wheat in Gansu Province should be less than 29.200 mg/kg.关键词
春小麦/As/胁迫/浓度/灌淤土/富集迁移/THQ法/人体健康风险评价Key words
Spring wheat/As/Stress/Concentration/Anthropogenic-alluvial soil/Accumulation and migration/THQ Method/Human health risk assessment分类
农业科技引用本文复制引用
焦位雄,杨虎德,林大松,李崇霄,冯丹妮..不同砷水平下小麦砷迁移累积特征及健康风险评价[J].寒旱农业科学,2024,3(5):445-450,6.基金项目
甘肃省科技重点研发计划(18YF1FA094) （18YF1FA094）
甘肃省农业科学院中青年/博士基金(2022GAAS56). （2022GAAS56）
