Abstract：In order to definit whether the heavy metal contents in overground edible part of Milula spicata under different ecological environment in Tibet is exceeded standard，this experiment took 32 dry samples from 32 populations as test material；and detected the contents of Pb，Cr，Cd，As and Hg．The results
showed that the contents of Pb，Cr，As and Hg in SG4 population were significantly higher than those in the other populations，the contents of 5 heavy metals in the other 31 populations were generally lower．The 32 populations could be divided into 5 groups with different heavy metal contents by systematic clustering：high，higher，medium，lower，low．Caculating in terms of fresh samples，among 32 populations，only Cr and As had 25.00% and 3.13% over standard rates，respectively．Among SG4 population，the times of ultra standard of Cr and As were 3.84 and 0.70，respectively．The times of ultra standard of Cr in SG1，ZB2，NML1，SZZ1，RB1，DL2 and SR1 populations were 0.01-1.22．Grading in terms of comprehensive pollution index，SG4 population was classified as heavy pollution；SG1，ZB2，RB1 and SR1 as mild pollution；NML1，SZZ1 and DL2 as alert class；the other populations as safe class．Caculating in terms of dry samples，Cd did not exceed the standard，while the over standard rates of Pb，Cr，As and Hg were 59.38%，84.38%，34.38% and 84.38%，respectively．In each population，times of ultra standard of Pb，Cr，As and Hg were 0.02-4.39，0.05-31.26，0.03-10.36 and 0.04-1.48，respectively．In SG4 population，times of ultra standard of Pb，Cr and As were the highest，reaching 4.39，31.26 and 10.36，respectively．Grading in terms of comprehensive pollution index，except ZN1 and NML2 were alert class，the other populations were all mild to heavy pollution class．In general，the heavy metal elements in SG4 population exceeded the standard seriously and were inedible．The heavy metal elements in the other populations had little effect on fresh-eating．Because the local people mainly eat dried food，taking a small amount of dry one each time is advisable．
关志华，曹可凡，李宁，彭诗嶶，王忠红. 西藏不同居群野生穗花韭重金属含量评价[J]. 中国蔬菜, 2022, 1(4): 35-44.
GUAN Zhihua，CAO Kefan，LI Ning，PENG Shiwei，WANG Zhonghong. Evaluation on Heavy Metal Elements in Different Populations of Wild Milula spicata in Tibet. China Vegetables, 2022, 1(4): 35-44.