Cadmium Accumulation and Food Safety of First Crop and Ratoon Rice

SHI Pengtao; JIANG Yuehua; LIN Ying; LI Hong; WU Feng; WANG Yunru; ZHANG Lijuan; LAN Wei; QIN Yuyan

doi:10.19303/j.issn.1008-0384.2023.04.011

Volume 38 Issue 4

Apr. 2023

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Article Navigation > Fujian Journal of Agricultural Sciences > 2023 > 38(4): 468-474

SHI P T, JIANG Y H, LIN Y, et al. Cadmium Accumulation and Food Safety of First Crop and Ratoon Rice [J]. Fujian Journal of Agricultural Sciences，2023，38（4）：468−474 doi: 10.19303/j.issn.1008-0384.2023.04.011

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SHI P T, JIANG Y H, LIN Y, et al. Cadmium Accumulation and Food Safety of First Crop and Ratoon Rice [J]. Fujian Journal of Agricultural Sciences，2023，38（4）：468−474 doi: 10.19303/j.issn.1008-0384.2023.04.011

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Cadmium Accumulation and Food Safety of First Crop and Ratoon Rice

doi: 10.19303/j.issn.1008-0384.2023.04.011

Guangxi Subtropical Crops Research Institute, Guangxi Academy of Agricultural Sciences/Laboratory of Quality and Safety Risk Assessment for Agricultural Product (Nanning), Ministry of Agriculture and Rural Affairs/Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable, Ministry of Agriculture and Rural Affairs, Nanning, Guangxi　530001, China

Received Date: 2022-10-16
Accepted Date: 2022-10-16
Rev Recd Date: 2023-03-06

Available Online: 2023-04-14

Publish Date: 2023-04-28

Abstract

Abstract

Objective Accumulation and food safety of cadmium in first crop and ratoon rice were studied. Method In a greenhouse experiment, plants of Xiangliangyou 900 , touted as the “Super Rice”, were grown in pots with artificially added Cd in the soil at a rate of 0 (CK), 0.2, 0.4, 0.8, 1.2, or 1.5 mg·kg⁻¹. Cd contents in the roots, stems, leaves, and grains of the first and ratoon crops of the rice were determined, cumulation pattern analyzed, and risk of safety for consumption assessed. Result Cd in various organs of the rice plants of both first and ratoon crops increased with increasing Cd in soil in the order of roots＞leaves＞stems＞grains. In the ratoon season, the plants contained less Cd than in the first season. The roots of the first crop plants contained Cd in the range of 0.2317–0.9581 mg·kg⁻¹, which was 5.1%–20.5% and averaging 15.2% higher than the ratoon counterparts of 0.2128–0.7802 mg·kg⁻¹. The stems of the first crop plants had Cd in the range of 0.0212–0.0846 mg·kg⁻¹, which was 10.8%–42.6% and averaging 29.7% higher than the ratoon counterparts of 0.0189–0.0621 mg·kg⁻¹. In the leaves, the first crop plants showed Cd in the range of 0.0273–0.1157 mg·kg⁻¹, which was 10.3%–65.6% averaging 45.5% higher than the ratoon plants of 0.0245–0.0689 mg·kg⁻¹. And in the grains, the Cd content of the first crop rice was in the range of 0.0172–0.0516 mg·kg⁻¹, which was 12.8%–53.1% averaging 33.2% higher than 0.0150–0.0312 mg·kg⁻¹ of the ratoon plants. Other than CK, at a same level of Cd in the pot soil, significant differences on Cd contents between the two different crops of same rice plants were observed (P＜0.05). The capacity of accumulating Cd ranked by different organs was roots＞leaves＞stems＞grains. The heavy metal risk coefficients for individual organs of the ratoon rice were all less than 1. Conclusion Cd in various organs were less in the ratoon than the first crop rice. After harvest of first crop, the regenerated roots and stems on a ratoon rice plant did not inherit or transfer the Cd. Consequently, consumption of ratoon Xiangliangyou 900 rice would mean a reduced food safety risk for the consumers.
- Ratoon rice,
- super rice,
- cadmium accumulation,
- risk assessment,
- cadmium pollution

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References(26)

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