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为了研究土壤中重金属含量对枸杞果实重金属含量的影响,采用电感耦合等离子光谱-质谱(ICP-MS)检测法,对全国6个宁夏枸杞主产区的土壤和果实中10种重金属元素(Pb、Cd、Cr、As、Ni、Sr、Li、Y、La、Co)进行测定和比较。结果表明:6个主产区土壤重金属含量存在一定的差异;其中,新疆产区的Cd、Cr、As、Li、Ni、Co、Sr和Y,宁夏产区的Pb和La,河北产区的Pb和La含量相对较高。6个主产区枸杞果实中Pb、As、Ni含量差异不显著,其它重金属元素含量差异显著;其中,宁夏产区果实的Cd和Sr,内蒙古和青海产区果实的Cr,甘肃产区果实的Li,河北和青海产区果实的La、Co和Y含量相对较高。果实中Cd和Sr含量分别与土壤中Pb、La、Li和Li、La呈显著正相关;果实中Y和La的积累分别与果实Co之间的积累具有一定协同作用。总体来看,不同产区土壤均适宜种植宁夏枸杞,枸杞中金属元素含量均未超出国家药材标准。
In order to study the effect of heavy metal content in soil on the content of heavy metals in Lycium barbarum L., 10 heavy metal elements (Pb, Pb, Cd) in soil and fruit of 6 main Lycium barbarum areas in China were determined by inductively coupled plasma-mass spectrometry (ICP-MS) Cd, Cr, As, Ni, Sr, Li, Y, La, Co) were measured and compared. The results showed that the contents of heavy metals in the six main producing areas were different. Among them, the contents of Cd, Cr, As, Li, Ni, Co, Sr and Y in the producing areas of Xinjiang, Pb and La in Ningxia, Pb and La content is relatively high. The content of Pb, As, Ni in the six main producing areas of Lycium barbarum was insignificantly different, and the content of other heavy metal elements was significantly different. Among them, Cd and Sr in fruit of Ningxia, Cr in fruit in Inner Mongolia and Qinghai, fruit in Gansu Li, and the contents of La, Co and Y in fruits of Hebei and Qinghai were relatively high. The contents of Cd and Sr in fruit were positively correlated with Pb, La, Li and Li and La in soil, respectively. The accumulation of Y and La in fruit had some synergistic effect with the accumulation of fruit Co. Overall, Ningxia wolfberry was planted in the soils of different producing areas, and the content of metal elements in wolfberry did not exceed the national standard.