农学学报2023，Vol.13Issue(12)：39-45,7.
不同水稻品种稻谷对土壤中铅的积累特性及其安全风险评估
Lead Enrichment Characteristics in Soil of Different Rice Varieties and the Safety Risk Evaluation
摘要
Abstract
This study aims to explore the lead enrichment characteristics of rice varieties planted in Zhangzhou and the rice quality safety.15 local main rice varieties were used as the experimental materials,and pot experiments and field experiments of adding lead were adopted.The lead enrichment characteristics of rice were investigated,and the risk of rice quality safety was evaluated.The results showed that the lead content of the 15 rice varieties was in the range of 0.016-0.061 mg/kg,0.061-0.198 mg/kg and 0.157-0.606 mg/kg,respectively,when the total lead content of pot experiment was 22.4 mg/kg,103.5 mg/kg and 204.8 mg/kg in light acidic paddy soil(5.5＜pH≤6.5).When the total lead content of the field experiment was 23.4 mg/kg,26.4 mg/kg and 23.5 mg/kg in light acidic paddy soil(5.5＜pH≤6.5),the variation scope of lead content of the 15 rice varieties was 0.016-0.056 mg/kg,0.024-0.069 mg/kg and 0.014-0.056 mg/kg,respectively.The lead content of the same rice variety was positively and linearly correlated with the total lead content in soil(P＜0.01).There were significant differences in the enrichment ability of lead 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 lead in rice in GB 2762-2017(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 mg/kg,113.5-180.0 mg/kg and 82.7-107.1 mg/kg,respectively,in paddy soil(5.5＜pH≤6.5).Overall,the lead enrichment characteristics of the 15 main rice varieties in Zhangzhou are significantly different.Planting in paddy fields where the total lead content is above the critical risk value,the lead content will have a quality safety risk of being higher than 0.2 mg/kg.关键词
水稻品种/稻谷/铅/富集特性/质量安全/风险评价Key words
rice variety/rice/lead/enrichment characteristics/quality safety/risk assessment分类
农业科技引用本文复制引用
林芗华..不同水稻品种稻谷对土壤中铅的积累特性及其安全风险评估[J].农学学报,2023,13(12):39-45,7.基金项目
2021年福建省生态农业专项资金项目"水稻重金属低富集品种筛选及示范"(闽财农指[2020]105号). （闽财农指[2020]105号）
