不同水稻品种对镉、砷的吸收累积特征

Absorption and Accumulation Characteristics of Cadmium and Arsenic in Different Rice Varieties

采用田间试验方法,对污染稻田内15个水稻品种的镉、砷吸收累积特征进行了研究。结果表明:15个供试品种的稻米镉含量范围为0.04~0.06 mg/kg,均未超过食品安全国家标准;砷含量范围为0.15~0.28 mg/kg,其中C两优386、晶两优1212、泰优390和深两优475的稻米砷含量超过食品安全国家标准。镉的转运效率以深两优475最高,五优308最低,砷的转运效率以深优9595最高,Y两优9918最低。15个品种稻米镉、砷富集系数均低于1.0,说明该土壤上稻米对镉、砷的富集能力较弱。

Contaminated rice fields were selected and field test methods were used to study the absorption and accumulation characteristics of cadmium and arsenic in 15 rice varieties.The results showed that rice cadmium contents of the 15 tested varieties ranged from 0.04 to 0.06 mg/kg.According to the limit of cadmium(<0.2 mg/kg)in the national food safety standard(GB2762-2017),rice cadmium contents of the 15 tested varieties did not exceed the standard value.The contents of inorganic arsenic in 15 rice tested varieties ranged from 0.15 to 0.28 mg/kg.According to the limit of arsenic(<0.2 mg/kg)in the national food safety standard(GB2762-2017),the arsenic contents of C Liangyou 386,Jingliangyou 1212,Taiyou 390 and Shenliangyou 475 exceeded the standard value.The highest transfer efficiency of cadmium was in Shenliangyou 475,and the lowest was in Wuyou 308.The highest transfer efficiency of arsenic was in Shenyou 9595,and the lowest was in Y Liangyou 9918.The cadmium and arsenic enrichment coefficients of the 15 rice varieties were all below 1.0,indicating that these rice varieties had weak cadmium and arsenic enrichment capacities on this soil.