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中文摘要：
筛选和培育铅低积累作物品种已被用来降低铅流入到人们的食物链中.本实验采用盆栽方法,研究了16个选定的大豆品种在两个铅处理(500和1500 mg·kg-1)下的生长反应,并评估其对铅的耐性.结果表明,在两个铅处理(500和1500 mg·kg-1)下,大豆中Pb含量有显著差异(p<0.05),其平均值分别为0.19和0.27 mg·kg-1.在两种Pb梯度处理下富集系数的范围分别为0.003~0.014和0.002~0.012.16种大豆品种的富集系数在两种Pb梯度处理下均小于0.02,且存在显著差异(p<0.05),表明大豆吸收的Pb主要积累在根部.大豆品种:垦丰16号、绥农28号、中黄35号和黑河35号被发现符合低铅积累大豆品种的标准.这4个品种的大豆被进一步用于评估Pb和其他矿质营养元素之间的相互作用,如Ca、Cu、Fe、Mg、Mn和Zn.土壤中Pb含量会影响大豆对微量矿物营养元素的吸收,表现为土壤中高剂量Pb能抑制大豆对Ca、Cu、Fe、Mg和Zn的吸收,同时增加其对Mn的吸收和积累.
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