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Effects of forms and rates of potassium fertilizers on cadmium uptake by two cultivars of spring wheat (Triticum aestivum, L.).
Environ Int. 2004 Jan; 29(7):973-8.EI

Abstract

A greenhouse pot experiment was conducted to study the influence of potassium fertilizers in different forms and rates on cadmium (Cd) uptake by two cultivars of spring wheat (Triticum aestivum, L.): Brookton and Krichauff. Potassium fertilizers were added to soil at four levels: 0, 55, 110 and 166 mg K kg(-1) soil as KNO(3) (N), KCl (C) or K(2)SO(4) (S). CdCl(2) was added to all the treatments at a uniform rate equivalent to 15 mg Cd kg(-1) soil. Plant shoot and root dry weights (DW) of both cultivars were reduced significantly by the addition of K-fertilizer in C and S treatments but there were only marginal changes in the N treatments. The Cd concentrations in shoots and whole plants increased significantly (P<.001) with increasing K addition, from 37.5 to 81.4 mg kg(-1) and from 42.9 to 86.8 mg kg(-1) for Brookton and Krichauff, respectively. However, no obvious effect was observed in the N treatments, except for the highest K level (K3) where there was a sharp increase in Cd concentration compared to the lower additions. Forms of K-fertilizers significantly influenced the Cd concentrations in plant shoots and roots (P<.001), but there was no significant difference between C and S treatments. This experiment showed that anions Cl(-) and SO(4)(2-) increase Cd uptake by plants, which can be interpreted as Cl(-) and SO(4)(2-) complexing readily with Cd(2+) and thereby increasing the bioavailability of Cd(2+) in soils. The effect of potassium itself on plant uptake of Cd was also observed. We suggest that when applying potassium fertilizer to Cd-contaminated soils, the forms and rates should be considered.

Authors+Show Affiliations

Zhao ZQ
Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 100085 Beijing, China.
Zhu YG
No affiliation info available
Li HY
No affiliation info available
Smith SE
No affiliation info available
Smith FA
No affiliation info available

MeSH

Biological AvailabilityCadmiumFertilizersSoil PollutantsTissue DistributionTriticum

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

14592574

Citation

Zhao, Zhong-Qiu, et al. "Effects of Forms and Rates of Potassium Fertilizers On Cadmium Uptake By Two Cultivars of Spring Wheat (Triticum Aestivum, L.)." Environment International, vol. 29, no. 7, 2004, pp. 973-8.
Zhao ZQ, Zhu YG, Li HY, et al. Effects of forms and rates of potassium fertilizers on cadmium uptake by two cultivars of spring wheat (Triticum aestivum, L.). Environ Int. 2004;29(7):973-8.
Zhao, Z. Q., Zhu, Y. G., Li, H. Y., Smith, S. E., & Smith, F. A. (2004). Effects of forms and rates of potassium fertilizers on cadmium uptake by two cultivars of spring wheat (Triticum aestivum, L.). Environment International, 29(7), 973-8.
Zhao ZQ, et al. Effects of Forms and Rates of Potassium Fertilizers On Cadmium Uptake By Two Cultivars of Spring Wheat (Triticum Aestivum, L.). Environ Int. 2004;29(7):973-8. PubMed PMID: 14592574.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of forms and rates of potassium fertilizers on cadmium uptake by two cultivars of spring wheat (Triticum aestivum, L.). AU - Zhao,Zhong-Qiu, AU - Zhu,Yong-Guan, AU - Li,Hui-Ying, AU - Smith,Sally E, AU - Smith,F Andrew, PY - 2003/11/1/pubmed PY - 2004/4/23/medline PY - 2003/11/1/entrez SP - 973 EP - 8 JF - Environment international JO - Environ Int VL - 29 IS - 7 N2 - A greenhouse pot experiment was conducted to study the influence of potassium fertilizers in different forms and rates on cadmium (Cd) uptake by two cultivars of spring wheat (Triticum aestivum, L.): Brookton and Krichauff. Potassium fertilizers were added to soil at four levels: 0, 55, 110 and 166 mg K kg(-1) soil as KNO(3) (N), KCl (C) or K(2)SO(4) (S). CdCl(2) was added to all the treatments at a uniform rate equivalent to 15 mg Cd kg(-1) soil. Plant shoot and root dry weights (DW) of both cultivars were reduced significantly by the addition of K-fertilizer in C and S treatments but there were only marginal changes in the N treatments. The Cd concentrations in shoots and whole plants increased significantly (P<.001) with increasing K addition, from 37.5 to 81.4 mg kg(-1) and from 42.9 to 86.8 mg kg(-1) for Brookton and Krichauff, respectively. However, no obvious effect was observed in the N treatments, except for the highest K level (K3) where there was a sharp increase in Cd concentration compared to the lower additions. Forms of K-fertilizers significantly influenced the Cd concentrations in plant shoots and roots (P<.001), but there was no significant difference between C and S treatments. This experiment showed that anions Cl(-) and SO(4)(2-) increase Cd uptake by plants, which can be interpreted as Cl(-) and SO(4)(2-) complexing readily with Cd(2+) and thereby increasing the bioavailability of Cd(2+) in soils. The effect of potassium itself on plant uptake of Cd was also observed. We suggest that when applying potassium fertilizer to Cd-contaminated soils, the forms and rates should be considered. SN - 0160-4120 UR - https://www.unboundmedicine.com/medline/citation/14592574/Effects_of_forms_and_rates_of_potassium_fertilizers_on_cadmium_uptake_by_two_cultivars_of_spring_wheat__Triticum_aestivum_L___ DB - PRIME DP - Unbound Medicine ER -