土壤质地和pH对羊肚菌镉富集的影响及健康风险评估OA

To clarify the influence of soil texture and pH on the cadmium(Cd)accumulation in Morchella esculenta,210 paired samples of soil,nutrient bags,and M.esculenta were collected from the main production areas of M.esculenta in China.The effects of soil texture,pH and Cd forms on the Cd content in M.esculenta were investigated.The results showed that the range and average value of Cd content in dried M.esculenta were 0.150-3.762 mg/kg and 1.008 mg/kg,respectively.The average values of Cd content in soil and nutrient bag were 0.194 mg/kg and 0.086 mg/kg,respectively.The Cd content in M.esculenta was not significantly correlated with the Cd content in the nutrient bags(P＞0.05),but was significantly positively correlated with the total Cd content in the soil(r=0.324,P＜0.01).Compared with growing in clay soil and loamy soil,M.esculenta growing in sandy soil have a stronger ability to accumulate Cd.Soil available Cd content was significantly negatively correlated with soil pH(r=-0.56,P＜0.001)and significantly positively correlated with Cd content in M.esculenta(r=0.59,P＜0.001).Acidic conditions could promote the formation of available Cd in soil,thereby increasing the accumulation of Cd in M.esculenta.Based on the measured Cd pollution level of M.esculenta,the dietary health risk of Cd in M.esculenta was evaluated by the target hazard quotient(THQ)method,indicating that there was no obvious health risk to humans from the consumption of M.esculenta.These findings identified the soil factors affecting the Cd accumulation in M.esculenta and could provide effective scientific data for the prevention and control of Cd pollution in M.esculenta.