关键词: 羊肚菌, 土壤, 重金属, 污染评价, 生态风险, 健康风险

Abstract: In order to understand the heavy metal pollution status of morchella and planting areas,soil and morchella fruit samples were collected from Guizhou morchella planting area,the content of Pb,Cd,Cu,Zn,Cr,Hg and As in the samples was measured,and the degree of heavy metal pollution in the soil in the morchella planting area was evaluated by using the one-factor pollution index,the Nemero comprehensive pollution index and the Hakanson potential ecological index. The dietary health risk of heavy metals in morchella was then assessed using the target hazard quotient. The results showed that there were different degrees of heavy metal accumulation and exceeding the standard in the soil and morels in the soil and morels in the three planting areas. The comprehensive pollution index of Nemero showed that 12. 09%,4. 57% and 7. 20% of the planting areas of A,B and C are at the level of mild pollution respectively. The results of the Hakanson potential ecological index showed that the A and C planting areas belong to the medium potential risk level,and the A planting area belongs to the slight potential ecological risk level. The target hazard quotient indicated that the consumption of morchella in the three planting areas will not pose a dietary health risk to adults,but there will be certain As health risks for children eating it in the A planting area. Children in the C planting area consume it,there will be certain Hg health risks. The subsequent planting of morchella in morchella planting areas should pay attention to the control of soil heavy metal pollution,and strengthen the attention and management of the surrounding environment of the planting area.

Key words: morchella,soil,heavy metals,pollution assessment,ecological risk,health risk