Effects of soil acidification and liming on the phytoavailability of cadmium in paddy soils of central subtropical China

Zhu, Huiling; Cheng, Chiung-Hsiang; Xu, Chao; Zhu, Qihong; Huang, Daoyou

doi:10.1016/j.envpol.2016.10.043

Cited by 303 publications

(83 citation statements)

References 35 publications

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“…Chromium (Cr) is a necessary trace element in human body, but if excessive intake, Cr would accumulate in the liver, kidney, and endocrine glands, posing a risk to human health. The pollution of As, Cd, and Cr in rice has caused seriously economic losses to China's agricultural production and brought serious health risks to local population (Hu et al, ; Yang, Wang, & Chen, ; Zhu, Chen, Xu, Zhu, & Huang, ; Zhu, Williams, & Meharg, ).…”

Section: Introductionmentioning

confidence: 99%

Distribution of elements and their correlation in bran, polished rice, and whole grain

Yao

Chen

Sun

2020

Food Science & Nutrition

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The relationship of toxic elements (As, Cd, Cr) and trace elements (Cu, Se, Ni, Zn, Mn) in rice bran and corresponding polished rice is not well known. A total of 446 rice grains were collected from paddy fields distributed across China, and the concentrations of 8 elements in rice bran and their corresponding polished rice were measured. The levels of As, Cd, Cr, and Se have a good linear relationship between rice bran and polished rice (R2: .79, .97, .82, .99, respectively; all p < .001). Polishing rice could effectively remove the average contents of 44.4% As, 19.8% Cd, and 15.4% Cr in the whole grain, but caused the substantial losses of more than half of Mn and Ni (57.7% and 56.9%), and nearly one‐third (30.9%, 31.5%, and 29.1%) of Cu, Se, and Zn in brown rice although only about 10% of rice bran was milled. The "L" type correlation exists not only between As and Cd, but also between the nutrients Se, Mn, Ni, and the toxic elements As, Cd. These results indicated that As accumulation in rice could reduce the levels of essential mineral nutrients Mn, Ni, and Se. On the contrary, improving nutrient elements by fertilization could decrease the accumulation of some toxic elements. This provides a practical new idea for the prevention and control of rice As or Cd, and concomitantly improves the deficiency of nutrient elements in rice.

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Section: Introductionmentioning

confidence: 99%

Distribution of elements and their correlation in bran, polished rice, and whole grain

Yao

Chen

Sun

2020

Food Science & Nutrition

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“…Williams et al (2009) reported that 65% of rice grain samples from paddy fields impacted by mining activities in Hunan exceeded the Cd limit. Zhu et al (2016) showed that 76% of rice grain samples from central-eastern Hunan province exceeded the Cd limit, with the maximum Cd concentration up to 4.8 mg kg -1 . A number of factors likely contribute to the elevated Cd levels in rice grain in southern China, including contamination of soil and irrigation water, soil acidification and cultivation of rice cultivars with high Cd accumulation (Zhao et al 2015; Zhu et al 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Zhu et al (2016) showed that 76% of rice grain samples from central-eastern Hunan province exceeded the Cd limit, with the maximum Cd concentration up to 4.8 mg kg -1 . A number of factors likely contribute to the elevated Cd levels in rice grain in southern China, including contamination of soil and irrigation water, soil acidification and cultivation of rice cultivars with high Cd accumulation (Zhao et al 2015; Zhu et al 2016). Paddy rice is also efficient at accumulating As (Williams et al 2007).…”

Section: Introductionmentioning

confidence: 99%

“…These include liming of acidic soils, paddy water management, selection and breeding of rice cultivars with low accumulation of the contaminants, and phytoremediation. Liming is effective in decreasing Cd bioavailability in acidic soils and Cd uptake by rice (Bolan et al, 2003; Zhu et al 2016), but not for As. Paddy water management can produce opposite effects on Cd and As accumulation.…”

Section: Introductionmentioning

confidence: 99%

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Genotypic and Environmental Variations in Grain Cadmium and Arsenic Concentrations Among a Panel of High Yielding Rice Cultivars

Duan

Shao

Tang

et al. 2017

Rice

144

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BackgroundRice is a major dietary source of cadmium (Cd) and arsenic (As) for populations consuming rice as the staple food. Excessive Cd and As accumulation in rice grain is of great concern worldwide, especially in South China where soil contamination with heavy metals and metalloids is widespread. It is important to reduce Cd and As accumulation in rice grain through selection and breeding of cultivars accumulating low levels of Cd or As.ResultsTo assess the genetic and environmental variations in the concentrations of Cd and As in rice grains, 471 locally adapted high-yielding rice cultivars were grown at three moderately contaminated sites in South China for two years. Cadmium and As concentrations in brown rice varied by 10 – 32 and 2.5 – 4 fold, respectively. Genotype (G), environment (E) and G x E interactions were highly significant factors explaining the variations. Brown rice Cd concentration was found to correlate positively with the heading date among different cultivars, whereas As concentration and heading date correlated negatively. There was a significant and negative correlation between grain Cd and As concentrations.ConclusionsEight and 6 rice cultivars were identified as stable low accumulators of Cd and As, respectively, based on the multiple site and season trials. These cultivars are likely to be compliant with the grain Cd or As limits of the Chinese Food Safety Standards when grown in moderately contaminated paddy soils in South China.Electronic supplementary materialThe online version of this article (doi:10.1186/s12284-017-0149-2) contains supplementary material, which is available to authorized users.

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“…Compared with other major cereal crops, such as wheat and maize, rice has a higher uptake of Cd by roots (Sui et al 2018). With the increased Cd contamination in agricultural soils especially in some areas of southern China, large proportions of rice grain samples exceed the Chinese maximum permissible limit for Cd (0.2 mg/kg) (Du et al 2013; Zhu et al 2016; Chen et al 2018). Therefore, reducing Cd accumulation in rice grains is of great importance for ensuring food safety and human health.…”

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confidence: 99%

QTL pyramiding for producing nutritious and safe rice grains

Huang

Zhao

2020

JIPB

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Breeding of rice varieties that are enriched with essential micronutrients and simultaneously have reduced levels of toxic elements in grains is largely unexplored in rice breeding practice. In this issue of JIPB, Liu et al. (2020) developed two rice lines with a low level of cadmium and simultaneously high levels of zinc or selenium accumulation in the grains, thus providing elite genetic materials for breeding rice varieties that are important for addressing mineral malnutrition and ensuring food safety.

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Effects of soil acidification and liming on the phytoavailability of cadmium in paddy soils of central subtropical China

Cited by 303 publications

References 35 publications

Distribution of elements and their correlation in bran, polished rice, and whole grain

Distribution of elements and their correlation in bran, polished rice, and whole grain

Genotypic and Environmental Variations in Grain Cadmium and Arsenic Concentrations Among a Panel of High Yielding Rice Cultivars

QTL pyramiding for producing nutritious and safe rice grains

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