
Varieties Difference in Lead Enrichment Characteristics of Rice and the Safety Risks
Received date: 2023-08-17
Online published: 2024-01-23
Pot experiments and field experiments were adopted to explore the lead(Pb) enrichment characteristics of 15 local main rice varieties planted in Zhangzhou and the rice quality safety. The results showed that the Pb content of the 15 rice varieties was in the range of 0.016-0.061, 0.061-0.198 and 0.157-0.606 mg/kg, respectively, when the total Pb content of pot experiment was 22.4, 103.5 and 204.8 mg/kg in light acidic paddy soil (5.5<pH≤6.5), the variation scope of Pb content was 0.016-0.056, 0.014-0.056 and 0.024-0.069 mg/kg, respectively, when the total Pb content of the field experiment was 23.4, 23.5 and 26.4 mg/kg in light acidic paddy soil (5.5<pH≤6.5). The Pb content of the same rice variety was positively and linearly correlated with the total Pb content in soil (P<0.01). There were significant differences in the enrichment ability of Pb among different rice varieties (P<0.05), and the enrichment coefficient of pot experiment and field experiment was 0.059%-0.296% and 0.060%-0.261%, respectively. Cluster analysis indicated that there were 4 rice varieties with high enrichment ability, 6 varieties with medium enrichment ability and 5 varieties with low enrichment ability. According to the limit standard of Pb in rice in GB2762—2017(0.2 mg/kg), for rice varieties with low, medium and high enrichment ability, the critical risk value of cadmium was 204.1-274.7, 113.5-180.0 and 82.7-107.1 mg/kg, respectively, in light acidic paddy soil (5.5<pH≤6.5). For rice variety planted in paddy fields where the total Pb content is above the critical risk value, its Pb content will have a quality safety risk of being higher than 0.2 mg/kg.
Key words: rice; variety; grain; Pb; enrichment characteristics; quality safety; risk assessment
LIN Xianghua . Varieties Difference in Lead Enrichment Characteristics of Rice and the Safety Risks[J]. China Rice, 2024 , 30(1) : 63 -68 . DOI: 10.3969/j.issn.1006-8082.2024.01.011
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