Interaction between cadmium, lead and potassium fertilizer (K2SO4) in a soil-plant system

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	Interaction between cadmium, lead and potassium fertilizer (K2SO4) in a soil-plant system
	Chen, S; Sun, L; Sun, TH; Chao, L; Guo, GL; Chen, S, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Process, Shenyang 110016, Peoples R China
刊名	ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
	2007
卷号	29 期号:5 页码:435-446
关键词	Cadmium Lead Potassium Fertilizer (K2so4) Soil-plant System
ISSN号	0269-4042
英文摘要	A pot experiment was conducted to examine the influence of potassium (K) fertilizer (K2SO4) application on the phytoavailability and speciation distribution of cadmium (Cd) and lead (Pb) in soil. Spring wheat (Triticum aestivum L.) was selected as the test plant. There were seven treatments including single and combined contamination of Cd and Pb. CdCl2 center dot 2.5 H2O and Pb(NO3)(2) were added to the soil at the following dosages: Cd + Pb = 0.00 + 0.00, 5.00 + 0.00, 25.0 + 0.00, 0.00 + 500, 0.00 + 1000, 5.00 + 500 and 25.0 + 1000 mg kg(-1), denoted by CK, T1, T2, T3, T4, T5 and T6, respectively. The K fertilizer had five levels: 0.00, 50.0, 100, 200 and 400 mg K2O kg(-1) soil, denoted by K0, K1, K2, K3 and K4, respectively. The results showed that the K fertilizer promoted the dry weight (DW) of wheat in all treatments and alleviated the contamination by Cd and Pb. The application of K2SO4 reduced the uptake of Cd in different parts including roots, haulms and grains of wheat; the optimum dosage was the K2 level. K supply resulted in a significant (P < 0.05) decrease in the soluble plus exchangeable (SE) fraction of Cd and there was a negative correlation (not significant, P > 0.05) between the levels of K and the SE fraction of Cd in soil. The application of the K fertilizer could obviously restrain the uptake of Pb by wheat and there were significant (P < 0.05) negative correlations between the concentrations of Pb in grains and the levels of K in soil. K supply resulted in a decrease in the SE fraction of Pb (except the K1 level) from the K0 to K4 levels. At the same time, the application of the K fertilizer induced a significant (P < 0.05) decrease in the weakly specifically adsorbed (WSA) fraction of Pb and a significant (P < 0.05) increase in the bound to Fe-Mn oxides (OX) fraction of Pb. At different K levels, the concentration of Pb in the roots, haulms and grains had a positive correlation with the SE (not significant, P > 0.05) and WSA (significant, P < 0.05) fractions of Pb in the soil. All the K application levels in this experiment reduced the phytoavailability of Cd and Pb. Thus, it is feasible to apply K fertilizer (K2SO4) to alleviate contamination by Cd and/or Pb in soil. Moreover, the level of K application should be considered to obtain an optimal effect with the minimum dosage.
学科主题	Engineering, Environmental ; Environmental Sciences ; Public, Environmental & Occupational Health ; Water Resources
语种	英语
WOS记录号	WOS:000249656200008
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54623]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Chen, S, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Process, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, S,Sun, L,Sun, TH,et al. Interaction between cadmium, lead and potassium fertilizer (K2SO4) in a soil-plant system[J]. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,2007,29(5):435-446.
APA	Chen, S,Sun, L,Sun, TH,Chao, L,Guo, GL,&Chen, S, Chinese Acad Sci, Inst Appl Ecol, Key Lab Terrestrial Ecol Process, Shenyang 110016, Peoples R China.(2007).Interaction between cadmium, lead and potassium fertilizer (K2SO4) in a soil-plant system.ENVIRONMENTAL GEOCHEMISTRY AND HEALTH,29(5),435-446.
MLA	Chen, S,et al."Interaction between cadmium, lead and potassium fertilizer (K2SO4) in a soil-plant system".ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 29.5(2007):435-446.