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The effect of water flooding at grain-filling stage on the uptake of heavy metal(loid)s by rice in slightly alkaline paddy soil.
Environ Sci Pollut Res Int. 2022 May; 29(21):31363-31373.ES

Abstract

Continuous flooding has been widely used in paddy field to decrease the accumulation of heavy metal(loid)s by rice due to their decreased solubility and bioavailability of most heavy metal(loid)s under water flooding condition. A field experiment with six drainage treatments during grain-filling stage was performed to investigate the influence of different water flooding conditions on availability of cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), and mercury (Hg) and their accumulation by rice in alkaline paddy soil. The results showed at the end of experiment, the availability of Cd and Pb in soil with continuous flooding for above 25 days after full heading significantly decreased compared with draining immediately after full heading of rice. But some increase of the As availability in soil with different water regimes was observed at 15 days after beginning of experiment where the As availability was below its detection limit. Meanwhile, the concentrations of Cd and Cr both in rice grains and straws were decreased evidently with prolonged flooding at rice filling stage. The concentrations of Pb and Hg in grain were all below the detection limit, but increased in straw with draining 15 days later compared with draining immediately after full heading of rice. However, water regimes during grain-filling stage had little effect on As uptake by rice in alkaline paddy soil. Moreover, this study also discovered that organic matter may played a critical role in controlling availability of heavy metal(loid)s in alkaline soil. This work demonstrated that at alkaline paddy soil, maintaining water flooding until 5 days before harvest in rice grain-filling stage was an effective method to improve rice safety without decreasing yields in paddy field polluted with Cd, Cr, and As, but careful consideration is required for Pb and Hg.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Zhou J
The Agricultural Technique Popularization Centre of Jiangshan City, Jiangshan, 324100, Zhejiang, China. man_0034@163.com.

MeSH

ArsenicCadmiumChromiumEdible GrainLeadMercuryMetals, HeavyOryzaSoilSoil PollutantsWater

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35013965

Citation

Zhou, Jiangming. "The Effect of Water Flooding at Grain-filling Stage On the Uptake of Heavy Metal(loid)s By Rice in Slightly Alkaline Paddy Soil." Environmental Science and Pollution Research International, vol. 29, no. 21, 2022, pp. 31363-31373.
Zhou J. The effect of water flooding at grain-filling stage on the uptake of heavy metal(loid)s by rice in slightly alkaline paddy soil. Environ Sci Pollut Res Int. 2022;29(21):31363-31373.
Zhou, J. (2022). The effect of water flooding at grain-filling stage on the uptake of heavy metal(loid)s by rice in slightly alkaline paddy soil. Environmental Science and Pollution Research International, 29(21), 31363-31373. https://doi.org/10.1007/s11356-021-18328-y
Zhou J. The Effect of Water Flooding at Grain-filling Stage On the Uptake of Heavy Metal(loid)s By Rice in Slightly Alkaline Paddy Soil. Environ Sci Pollut Res Int. 2022;29(21):31363-31373. PubMed PMID: 35013965.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The effect of water flooding at grain-filling stage on the uptake of heavy metal(loid)s by rice in slightly alkaline paddy soil. A1 - Zhou,Jiangming, Y1 - 2022/01/10/ PY - 2021/07/26/received PY - 2021/12/21/accepted PY - 2022/1/12/pubmed PY - 2022/5/4/medline PY - 2022/1/11/entrez KW - Irrigating management, Availability, Heavy metal(loid)s, Rice safety KW - Responsible editor: Gangrong Shi SP - 31363 EP - 31373 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 29 IS - 21 N2 - Continuous flooding has been widely used in paddy field to decrease the accumulation of heavy metal(loid)s by rice due to their decreased solubility and bioavailability of most heavy metal(loid)s under water flooding condition. A field experiment with six drainage treatments during grain-filling stage was performed to investigate the influence of different water flooding conditions on availability of cadmium (Cd), lead (Pb), chromium (Cr), arsenic (As), and mercury (Hg) and their accumulation by rice in alkaline paddy soil. The results showed at the end of experiment, the availability of Cd and Pb in soil with continuous flooding for above 25 days after full heading significantly decreased compared with draining immediately after full heading of rice. But some increase of the As availability in soil with different water regimes was observed at 15 days after beginning of experiment where the As availability was below its detection limit. Meanwhile, the concentrations of Cd and Cr both in rice grains and straws were decreased evidently with prolonged flooding at rice filling stage. The concentrations of Pb and Hg in grain were all below the detection limit, but increased in straw with draining 15 days later compared with draining immediately after full heading of rice. However, water regimes during grain-filling stage had little effect on As uptake by rice in alkaline paddy soil. Moreover, this study also discovered that organic matter may played a critical role in controlling availability of heavy metal(loid)s in alkaline soil. This work demonstrated that at alkaline paddy soil, maintaining water flooding until 5 days before harvest in rice grain-filling stage was an effective method to improve rice safety without decreasing yields in paddy field polluted with Cd, Cr, and As, but careful consideration is required for Pb and Hg. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/35013965/The_effect_of_water_flooding_at_grain_filling_stage_on_the_uptake_of_heavy_metal_loid_s_by_rice_in_slightly_alkaline_paddy_soil_ DB - PRIME DP - Unbound Medicine ER -