Cadmium Uptake by Lettuce in Fields Treated with Cadmium‐Spiked Phosphorus Fertilizers

Chen, Weiping; Li, Lianqing; Chang, Andrew C.; Wu, Laosheng; Kwon, Soon‐Ik; Bottoms, Rick

doi:10.1080/00103620902753871

Cited by 16 publications

(12 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even when it is well recognized that C ss in the rizosphere may change throughout the season due to the influence of roots on soil pH, organic acids concentration, and water content (Gobran et al 2001), the bulk soil solution concentration is less sensitive to such effects. Chen et al (2009b) observed that bulk Cd-C ss slightly varied over the growing season, with no significant effect of time in a soil cultivated with lettuce. Thus, for modeling purposes, the bulk C ss could be considered constant.…”

Section: Resultsmentioning

confidence: 93%

“…In our experiment and in a previously reported work (Chen et al 2009b(Chen et al )2009b, the trace element uptake rates were related to its soil solution concentration. The kinetic parameters of the model accounted for the change of the plants' ability to uptake the elements during the growing season and allowed comparisons among them.…”

Section: Plant Uptake Factormentioning

confidence: 89%

“…By integrating the Michaelis-Menten and the uptake kinetics models, Chen et al (2008Chen et al ( , 2009b characterized the Cd uptake by lettuce (Lactuca sativa L.) plants grown on an Entisol. The root density of growing plant is a function of its above ground biomass.…”

Section: Conceptual Considerationsmentioning

confidence: 99%

“…In this manner, the BM max may be estimated by measuring the plant biomass, BM(t), at any time t (in°C-day). Assuming that plant uptake is proportional to the biomass of growing plants, the trace element cumulative uptake rate could be determined as (Chen et al 2009b):…”

Section: Conceptual Considerationsmentioning

confidence: 99%

“…The model represented by the Eqs. 6-8 was evaluated by Chen et al (2009b) only for Cd uptake in field-cultivated lettuce (leafy vegetable). Consequently, the model has not been applied to compare different trace elements or tested on a different plant species (e.g., cereals).…”

Section: Conceptual Considerationsmentioning

confidence: 99%

See 4 more Smart Citations

Trace element uptake dynamics for maize (Zea mays L.) grown under field conditions

Molina

Escudey

Chang³

et al. 2013

Plant Soil

Self Cite

View full text Add to dashboard Cite

Background and aims The trace element uptake process of plants is a key factor in assessing the risks of trace element build-up in agricultural soils. Scarce information exists on the trace element dynamic uptake of plants grown in the field, especially on those potentially hazardous. In this study, the uptake process of As, Cd, Cu, and Zn in maize plants was quantified and characterized throughout the entire season. Methods Along two seasons, the uptake dynamics of field-grown maize plants in absorbing the soil borne trace elements was examined. Biomass production and the concentration of the elements in plant and soil solution samples were determined. A kinetic model was employed to characterize the uptake by plants. ResultsThe kinetic parameters of the uptake process, maximum cumulative uptake rate, U max , time to reach 50 % of U max , t U50 , and reciprocal of the uptake rate, b U when followed throughout the season in terms of the plant's growing degree days remained constant between seasons and were element specific. In spite of the large amount biomass produced, maize plants extracted minute quantities of Cd and As. Increasing cumulative uptake rates of As, Cd, Cu, and Zn from the soil took place primarily in the early half of the growing season when the biomass accumulation was still less than 50 % of the maximum harvested biomass. The element-specific plant uptake factor (PUF), which denote the partition of trace elements between the soil solution and plant phases, decreased following Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Santiago 9170124, Chile a first-order kinetics along the growing period, did not show any significant difference between seasons, and, a t m a t u r i t y s t a g e , f o l l o w e d t h e s e q u e n c e Cd≥Zn>Cu≥As. Conclusions The uptake process of the elements was adequately described by the kinetic model, showing similar patterns but different magnitude and distribution in the plant. The extraction of Cd and As by plants is low in comparison to common inputs through fertilizer applications into maize production systems, indicating potential risk of trace element accumulation in soils. The PUF may be estimated according to the kinetics parameters of the uptake process. On a per-unit-soil solution element basis, Cd and Zn would be more susceptible to the soil-to-plant transfer than As and Cu.

show abstract

Section: Resultsmentioning

confidence: 93%

Section: Plant Uptake Factormentioning

confidence: 89%

Section: Conceptual Considerationsmentioning

confidence: 99%

Section: Conceptual Considerationsmentioning

confidence: 99%

Section: Conceptual Considerationsmentioning

confidence: 99%

See 3 more Smart Citations