Amendment damages the function of continuous flooding in decreasing Cd and Pb uptake by rice in acid paddy soil

Ye, Xinxin; Li, Hongying; Zhang, Ligan; Chai, Rongyao; Tu, Renfeng; Gao, Hongjian

doi:10.1016/j.ecoenv.2017.09.034

Cited by 38 publications

(5 citation statements)

References 54 publications

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“…Normally, potentially toxic element concentrations in brown rice are significantly affected by straw and rice root concentrations [51,52,53]. Previous studies have shown that the Cd concentration in rice root and straw was significantly decreased by application of water regimes or amendment [19,54]. With liming, Cd concentration in the root decreased significantly at the filling stages of rice, whereas at maturity stage there was lower Cd accumulation in straw than that in root.…”

Section: Resultsmentioning

confidence: 99%

Effect of Liming with Various Water Regimes on Both Immobilization of Cadmium and Improvement of Bacterial Communities in Contaminated Paddy: A Field Experiment

Shi

Guo

Fang

et al. 2019

IJERPH

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Cadmium (Cd) in paddy soil is one of the most harmful potentially toxic elements threatening human health. In order to study the effect of lime combined with intermittent and flooding conditions on the soil pH, Cd availability and its accumulation in tissues at the tillering, filling and maturity stages of rice, as well as enzyme activity and the microbial community in contaminated soil, a field experiment was conducted. The results showed that liming under flooding conditions is a more suitable strategy for in situ remediation of Cd-contaminated paddy soil than intermittent conditions. The availability of Cd in soils was closely related to the duration of flooding. Liming was an effective way at reducing available Cd in flooding soil because it promotes the transformation of Cd in soil from acid-extractable to reducible fraction or residual fraction during the reproductive growth period of rice. Compared with control, after liming, the concentration of Cd in brown rice was reduced by 34.9% under intermittent condition while reduced by 55.8% under flooding condition. Meanwhile, phosphatase, urease, and invertase activities in soil increased by 116.7%, 61.4% and 28.8%, and 41.3%, 46.5% and 20.8%, respectively. The high urease activity in tested soils could be used to assess soil recovery with liming for the remediation of contaminated soil. Soil microbial diversity was determined by the activities of soil acid phosphatase, urease and available Cd by redundancy analysis (RDA). The results indicated that the problem of Cd-contaminated paddy soil could achieve risk control of agricultural planting by chemical treatment such as lime, combined with various water regimes.

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Section: Resultsmentioning

confidence: 99%

Effect of Liming with Various Water Regimes on Both Immobilization of Cadmium and Improvement of Bacterial Communities in Contaminated Paddy: A Field Experiment

Shi

Guo

Fang

et al. 2019

IJERPH

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“…Furthermore, this study highlights that the reduction and control in Cd pollution in rice through CF were limited to acidic soil environments and are not applicable to alkaline soil conditions. Previous investigations on pot experiments have suggested that bioavailability and Cd availability in contaminated rice field soil are influenced by various factors, including alkaline fertilizer, water management, and soil pH [27]. The pH of paddy soils has been reported to significantly affect Cd bioavailability [28].…”

Section: Discussionmentioning

confidence: 99%

Evaluating Water Management Efficiency in Regulating Cadmium and Arsenic Accumulation in Rice in Typical Japonica Paddy Soils at Varied pH Levels

Wu,

Lin,

et al. 2024

Agriculture

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There is growing concern regarding cadmium (Cd) exposure through rice consumption. Compared with alternate wetting and drying (AWD), continuous flooding (CF) is usually considered as an effective approach for reducing Cd enrichment in rice but increases the risk of pollution from arsenic (As). In this study, the field trial was conducted to investigate remediation effects of two water management (CF and AWD) techniques on Cd pollution in rice in typical japonica rice cultivation areas with varied soil pH levels. The results indicate that soil pH was a crucial factor in regulating CF-mediated Cd/As accumulation and migration in rice plants, and grains at all stages of rice growth. In acidic fields, compared with AWD, the use of CF reduced the accumulation of Cd in plants during the tillering stage; CF during the milk stage promotes the risk of contamination of Cd in rice grains and any form of As in plants and inhibits the content of any forms of As in grains. During the mature stage, CF reduced the levels of Cd in the plants and grains while promoting the accumulation of As(V) and total As(T-As) in plants and As(III) in grains. In alkaline fields, compared with AWD, CF during the tillering stage promoted the accumulation of various forms of As in plants. During the milk stage, CF increased and decreased the Cd content in plants and grains, respectively, and reduced the accumulation of T-As in plants and As(III) in grains; during the mature stage, CF promoted the accumulation of Cd in plants and grains, induced the accumulation of T-As plants, and inhibited the accumulation of any form of As in grains. From the perspective of food safety, the impact of CF conditions on the accumulation of Cd and As in rice from acidic fields exhibited a pattern of reduction in Cd and increase in As during the maturity period, as compared to that on the AWD. Conversely, CF increased the Cd risk while simultaneously reducing the As accumulation in rice grains to a safe level in alkaline fields. CF is not recommended as a remediation strategy for Cd pollution in rice in low Cd pollution areas, but it can be considered as a potential strategy for As pollution remediation in rice in alkaline fields with low Cd pollution.

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“…Because, radial oxygen loss from rice roots temporarily oxygenates the rhizosphere and causes redox oscillations in the soil (Maisch et al, 2019). Rinklebe(2016) and Ye(2018) found that the reduction of sulfate to sul de and the formation of insoluble CdS consequently reduced available Cd in the ooded soil. Intermittent ooding promote rice growth through regulate of soil permeability.…”

Section: Introductionmentioning

confidence: 99%

Effects of water-fertilizer coupling on immobilization remediation technology using sepiolite

Liu

Yue

Huang

et al. 2022

Preprint

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Sepiolite shows great potential to reduce the pollution risk of cadmium (Cd)-contaminated rice in acidic paddy soils, but the efficiency in practical application was synergy of water-fertilizer coupling. We studied the effect of goat manure in sepiolite amended soil under aerobic, intermittent, and flooded irrigation condition. The results showed that the application of sepiolite alone increased soil pH, as a consequence, sepiolite decreased available Cd under flooded condition. The application of goat manure alone increased DOM content in unamended and sepiolite amended soil. As a result, goat manure increased available Cd under aerobic and flooded water condition in sepiolite amended soil. Under intermittent water condition, the combined application of sepiolite and goat manure inhibited the transfer of Cd from roots to unpolished rice to the greatest extent. The application of sepiolite in Cd polluted soil decreased the accumulation of Cd in unpolished rice at the first year, but Cd content witnessed slight increase at the second year. But, the application of goat manure in sepiolite amended soil further decreased Cd content in unpolished rice under intermittent irrigation condition. As a result, the application of goat manure and intermittent irrigation pattern could present a water-fertilizer coupling effect in sepiolite amended soil and further increased the long-term passivation effect of sepiolite.

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Amendment damages the function of continuous flooding in decreasing Cd and Pb uptake by rice in acid paddy soil

Cited by 38 publications

References 54 publications

Effect of Liming with Various Water Regimes on Both Immobilization of Cadmium and Improvement of Bacterial Communities in Contaminated Paddy: A Field Experiment

Effect of Liming with Various Water Regimes on Both Immobilization of Cadmium and Improvement of Bacterial Communities in Contaminated Paddy: A Field Experiment

Evaluating Water Management Efficiency in Regulating Cadmium and Arsenic Accumulation in Rice in Typical Japonica Paddy Soils at Varied pH Levels

Effects of water-fertilizer coupling on immobilization remediation technology using sepiolite

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