Root-Induced Changes of pH, Eh, Fe(Ⅱ) and Fractions of Pb and Zn in Rhizosphere Soils of Four Wetland Plants with Different Radial Oxygen Losses

	Root-Induced Changes of pH, Eh, Fe(Ⅱ) and Fractions of Pb and Zn in Rhizosphere Soils of Four Wetland Plants with Different Radial Oxygen Losses
	Yang Junxing 3; Liu Yong 2; Ye Zhihong 1
刊名	Pedosphere
	2012
卷号	22 期号:4 页码:518
关键词	heavy metal iron oxidation mobility factor plaque rhizobox
ISSN号	1002-0160
英文摘要	A rhizobox experiment was conducted to compare iron (Fe) oxidation and changes of pH, redox potential (Eh) and fractions of zinc (Zn) and lead (Pb) in rhizosphere and non-rhizosphere soils of four emergent-rooted wetland plants (Echinodorus macrophyllus, Eleocharis geniculata, Hydrocotyle vulgaris and Veronica serpyllifolia) with different radial oxygen loss (ROL) from roots. The results indicated that all these wetland plants decreased pH and concentration of Fe(Ⅱ) but increased the Eh in the rhizosphere soils. Pb and Zn were transformed from unstable fractions to more stable fractions in the rhizosphere soils, so decreasing their potential metal mobility factors (MF). Among the four plants, E. macrophyllus, with the highest ROL and root biomass, possessed the greatest ability in formation of Fe plaque and in the reduction of heavy metal MFs in the rhizosphere soil. Wetland plants, with higher ROLs and root biomass, may thus be effective in decreasing potential long-term heavy metal bioavailabilities.
语种	英语
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/152137]
专题	中国科学院地理科学与资源研究所
作者单位	1.中山大学 2.South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences 3.中国科学院地理科学与资源研究所
推荐引用方式 GB/T 7714	Yang Junxing,Liu Yong,Ye Zhihong. Root-Induced Changes of pH, Eh, Fe(Ⅱ) and Fractions of Pb and Zn in Rhizosphere Soils of Four Wetland Plants with Different Radial Oxygen Losses[J]. Pedosphere,2012,22(4):518.
APA	Yang Junxing,Liu Yong,&Ye Zhihong.(2012).Root-Induced Changes of pH, Eh, Fe(Ⅱ) and Fractions of Pb and Zn in Rhizosphere Soils of Four Wetland Plants with Different Radial Oxygen Losses.Pedosphere,22(4),518.
MLA	Yang Junxing,et al."Root-Induced Changes of pH, Eh, Fe(Ⅱ) and Fractions of Pb and Zn in Rhizosphere Soils of Four Wetland Plants with Different Radial Oxygen Losses".Pedosphere 22.4(2012):518.