Trends and Annual Variations in Cd Concentrations in Grain of Winter Wheat

Andersson, Arne; Bingefors, S.

doi:10.1080/00015128509442044

Cited by 50 publications

(15 citation statements)

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“…An assumption was made that most of the dissolved Cd was present as Cd 2+ and could be taken up by the plant. These results are in agreement with those of Andersson & Bingefors (1985).…”

Section: Discussionsupporting

confidence: 83%

Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (Lactuca sativa L.)

Haghighi

Kafi²,

Fang

et al. 2010

Journal of Fruit and Ornamental Plant Research

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Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (Lactuca sativaL.)The binding of Cd to humic acid was studied. The influence of a Cd-humic complex on enzyme activities (superoxide dismutases, peroxidases), availability of Cd, and biomass compared with the behavior of no treatment (control). It was examined through a hydroponics system in lettuce. Treatments were: control (no additions), humic acid (0, 100 and 1000 mg·L-1), and Cd (0, 2 and 4 mg·L-1). Enzyme activities increased significantly with increasing rates of cadmium. A significant increase (P<0.05) in cadmium content of leaves result in a considerable decrease in the biomass (P<0.05). It can be concluded that the humic acid applied in the media led to a decrease the metal adsorption by plant. This material can be used to reduce the availability and mobility of heavy metals in the soils, too.

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“…An assumption was made that most of the dissolved Cd was present as Cd 2+ and could be taken up by the plant. These results are in agreement with those of Andersson & Bingefors (1985).…”

Section: Discussionsupporting

confidence: 83%

Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (Lactuca sativa L.)

Haghighi

Kafi²,

Fang

et al. 2010

Journal of Fruit and Ornamental Plant Research

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“…Concerning Cd, investigations of Swedish wheat grain samples from 1920 to 1980 showed increasing concentrations from 0.025 to 0.055 mg Cd kg -1 grain (Andersson and Bingefors 1985). The increase in crops could be due to several reasons: soil application of Cd-contaminated P fertilizers, atmospheric deposition from iron, steel and oil combustion, but also changes in agriculture separating crop and animal production whereby immobilization of Cd in manure was eliminated on crop production farms.…”

Section: Resultsmentioning

confidence: 95%

Trace element concentration in wheat grain: results from the Swedish long-term soil fertility experiments and national monitoring program

Kirchmann

Mattsson

Eriksson

2009

Environ Geochem Health

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Concentrations of trace elements in wheat grain sampled between 1967 and 2003 from the Swedish long-term soil fertility experiments were analyzed using ICP-MS. The long-term effect of inorganic and organic fertilization on trace metal concentrations was investigated including the impact of atmospheric deposition and myccorhiza, whereas other factors such as soil conditions, crop cultivar, etc. are not discussed in this paper. Mean values derived from 10 experimental sites were reported. Significantly declining Pb and Cd concentrations in wheat grain could be explained by lower atmospheric deposition. Mean Se contents in all samples were 0.031 mg kg(-1) grain dry weight. No samples had sufficiently high Se concentrations for human (0.05 mg Se kg(-1)) or animal demand (0.1 mg Se kg(-1)). Concentrations of Co in wheat grain were extremely low, 0.002-0.005 mg Co kg(-1) grain dry weight, and far below the minimum levels required by animals, which applied to all fertilizer treatments. A doubling of Mo concentrations in grain since 1975 resulted in Cu/Mo ratios often below one, which may cause molybdenosis in ruminants. The increase in Mo concentrations in crops correlated with the decline in sulfur deposition. Concentrations of Cu and Fe declined in NPK-fertilized wheat as compared to unfertilized or manure-treated wheat. Very low concentrations of Se and Co and low concentrations of Fe and Cu require attention to counteract risks for deficiencies. The main characteristic of the study is that there are few significant changes over time between different fertilizer treatments, but throughout there are low concentrations of most trace elements in all treatments. In general, good agreement between concentrations in wheat from the long-term fertility experiments and the national monitoring program indicate that values are representative.

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“…The same varieties were grown side by side during a succession of years. Contents of Cd and certain other elements in the samples have been reported earlier (Andersson, 1983;Andersson and Bingefors, 1985).…”

Section: Methodsmentioning

confidence: 99%

Trends and annual fluctuations in selenium concentrations in wheat grain

Johnsson

1991

Plant Soil

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Selenium concentrations were determined in grain from four varieties of winter and spring wheat grown in the same area during 1918-1979 and 1930-1980, respectively. Concentrations in the four longest series tended to decrease over time. The annual variation, expressed as the coefficient of variation, ranged between 51%-62% for the four investigated series. According to regression calculations, an additional 100mm of precipitation during the growing season (May-August) would lead to a 7.2ngSe g-1 increase in the Se concentration of spring wheat grain. For winter wheat grain the calculated increase was not significant. No correlation was found between grain yield and grain Se concentration. Although there was a significant difference in grain Se concentrations between spring wheat varieties, there was no indication that older varieties differed from newer ones in this regard.

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Trends and Annual Variations in Cd Concentrations in Grain of Winter Wheat

Cited by 50 publications

References 2 publications

Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (Lactuca sativa L.)

Humic Acid Decreased Hazardous of Cadmium Toxicity on Lettuce (Lactuca sativa L.)

Trace element concentration in wheat grain: results from the Swedish long-term soil fertility experiments and national monitoring program

Trends and annual fluctuations in selenium concentrations in wheat grain

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