Effect of soil pH on cadmium phytoavailability in some New Zealand soils

Gray, C. W.; McLaren, R. G.; Roberts, A. H. C.; Condron, Leo M.

doi:10.1080/01140671.1999.9514093

Cited by 73 publications

(43 citation statements)

References 28 publications

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“…In soils with similar Cd levels, the pH played a vital role in metal uptake. This finding is similar to results in the literature (Strobel et al, 2005;Meers et al, 2005;McBride, 2002;Gray et al, 1999) showing that Cd availability to plants in soils is influenced by soil properties. Recent studies even proposed that Cd uptake by crops could be estimated from the total soil Cd, soil pH, and % humus (McBride, 2002;Hough et al, 2003).…”

Section: And Pb Accumulation In Plants With Respect To Soil Propersupporting

confidence: 92%

The influence of humic acids on the accumulation of lead (Pb) and cadmium (Cd) in tabacco leaves grown in different soils

Yang

Tian

et al. 2013

J. Soil Sci. Plant Nutr.

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Abstract:Four types of soil (red, yellow, cinnamon, and paddy soil) from China were used to conduct experiments in pots to study the influence of humic acid (humic acid (HA) and fulvic acid (FA)) on the accumulation of lead (Pb) and cadmium (Cd) in tobacco leaves. In non-polluted soils, the tobacco leaf uptake of Cd was dramatically influenced by the total soil metal concentration and soil properties, with no relationship observed for Pb. However, in soils that were polluted with 500 mg kg -1 of Pb or10 mg kg -1 of Cd, negative relationships were observed between the soil pH and the metal concentration in the tobacco leaves. When the soil was polluted with Pb, the application of 4 g kg -1 humic acids (HA or FA) decreased the leaf Pb concentration by 17.78%-48.32%in the acidic red and paddy soils but increased the concentration by 11.69%-37.54% in the alkaline cinnamon soil. A 8.74%-32.84% decrease in the leaf Cd concentration occurred in the acidic soils due to 4 g kg -1 HA, while there was a 4.45%-8.13%decrease and a 14.20%-46.37% increase in leaf Cd concentration in the yellow and cinnamon soils when HA and FA were applied, respectively. This finding suggests that the effects of humic acids on metal availability to plants in soil were pH-dependent, with inhibitory and stimulatory effects on acidic and alkaline soils, respectively. Therefore, humic acids (HA and FA) could be used to reduce Pb and Cd accumulation in plants growing in polluted acidic soil but not in alkaline soils.

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Section: And Pb Accumulation In Plants With Respect To Soil Propersupporting

confidence: 92%

The influence of humic acids on the accumulation of lead (Pb) and cadmium (Cd) in tabacco leaves grown in different soils

Yang

Tian

et al. 2013

J. Soil Sci. Plant Nutr.

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“…Moreover, a wide spectrum of physicochemical parameters of the tested set of soils introduced too many factors for statistical evaluations of the results. According to Gray et al [41] the weak extractants such as 0.01 mol L −1 CaCl 2 and 1 mol L −1 NH 4 NO 3 are sensitive to soil pH changes because of their low buffering capacity and are considered as representative of plant-available metal conditions. For oxide fractions of cadmium ranged between 26.3 % for method C and 48 % for method A.…”

Section: Cadmiummentioning

confidence: 99%

A comparison of sequential extraction procedures for fractionation of arsenic, cadmium, lead, and zinc in soil

et al. 2005

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Twelve soil samples differing in physicochemical properties and total element contents were extracted by three sequential extraction procedures to determine As, Cd, Pb, and Zn bound to individual soil fractions and are defined by individual operational procedures. In the case of arsenic, two additional sequential extraction schemes were designed entirely for fractionation of soil containing arsenic were tested. The results confirmed that determination of element proportions bound to individual soil fractions is strongly dependent on the extracting agent and/or procedure applied within individual extracting schemes. As expected, absolute values of the elements released among the individual extracting procedures are weakly comparable. More reliable results were determined for the more mobile soil elements i.e. cadmium and zinc, in the fractions characterizing the most mobile proportions of investigated elements where significant correlations with basic soil characteristics were observed. In contrast, ambiguous results were observed for As and Pb, for both the individual extraction procedures and the effect of the soil characteristics. Regardless of the studied element, the poorest results were determined for reducible and oxidizable soil fractions. The application of at least two independent procedures or modification of the extraction scheme according to element investigated and/or particular soil characteristics can also be helpful in definition of element pattern in soils in further research.

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“…These include soil pH (Jackson & Alloway 1991;Gray et al 1999b), soil organic matter (He & Singh 1993), soil salinity (McLaughlin et al 1994), total soil Cd (Lund et al 1981), and various micro-and macronutrients (Oliver et al 1994;Sparrow et al 1994;Grant et al 1996). Tables 7 and 8 show mean grain Cd concentrations determined for winter and spring wheat experimental sites respectively.…”

Section: Soil and Wheat Grain Relationshipsmentioning

confidence: 99%

Cadmium concentrations in some New Zealand wheat grain

Gray¹,

McLaren

Roberts

2001

New Zealand Journal of Crop and Horticultural Science

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simple correlations between major soil properties and wheat grain Cd concentrations for either winter or spring wheat. For winter wheat, a multiple regression model with terms for total zinc (Zn) and CaCl 2 -extractable Cd yielded the highest correlation with winter wheat Cd concentrations (r 2 = 0.59 P < 0.05). Low Cd accumulating wheat cultivars can be selected for use at sites where the Cd concentration in grain exceeds the MPC. Future work is required to determine which soil properties are important in controlling wheat grain Cd concentrations.Keywords phytoavailability; soil; cultivars; zinc Abstract The variation in wheat (Triticum aestivum L.) grain cadmium (Cd) concentrations between different cultivars was investigated along with a preliminary ranking of soil properties in terms of their importance in controlling wheat grain Cd concentrations. Results indicate that there is considerable variation in Cd concentrations in New Zealand wheat grain samples. The mean Cd concentration for wheat in this study is 54 µg kg 1 fresh weight (FW). Ten percent of the grain samples examined in this study are non-compliant with the maximum permissible concentration (MPC) for Cd in wheat grain. However almost 50% of non-compliant samples were found at a single site, and at a number of sites no samples exceeded MPC. There was a 4-fold range in the abilities of different wheat cultivars to accumulate Cd in grain. There was also seasonal variation in Cd uptake for wheat cultivars grown at the same site. Extractable soil Cd using a weak salt reagent yielded the highest correlation with grain Cd concentrations in spring wheat across all soils, whereas no significant relationships were found for winter wheat. There were no significant H00050

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Effect of soil pH on cadmium phytoavailability in some New Zealand soils

Cited by 73 publications

References 28 publications

The influence of humic acids on the accumulation of lead (Pb) and cadmium (Cd) in tabacco leaves grown in different soils

The influence of humic acids on the accumulation of lead (Pb) and cadmium (Cd) in tabacco leaves grown in different soils

A comparison of sequential extraction procedures for fractionation of arsenic, cadmium, lead, and zinc in soil

Cadmium concentrations in some New Zealand wheat grain

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