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Journal of Plant Nutrition Volume 34, 2010 - Issue 1
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Original Articles

EFFECT OF NITROGEN FERTILIZER ON GROWTH AND CADMIUM ACCUMULATION IN SEDUM ALFREDII HANCE

E. Zhu Ministry of Education Key Lab of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China; Shanghai Agricultural Extension and Service Center, Shanghai, China
,
D. Liu Ministry of Education Key Lab of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
,
J. G. Li Ministry of Education Key Lab of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
,
T. Q. Li Ministry of Education Key Lab of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
,
X. E. Yang Ministry of Education Key Lab of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China; Institute of Food and Agricultural Sciences, Indian River Research and Education Center, University of Florida, Fort Pierce, Florida, USA
,
Z. L. He Institute of Food and Agricultural Sciences, Indian River Research and Education Center, University of Florida, Fort Pierce, Florida, USA
&
P. J. Stoffella Institute of Food and Agricultural Sciences, Indian River Research and Education Center, University of Florida, Fort Pierce, Florida, USA
 show all
Pages 115-126 | Received 06 Feb 2009, Accepted 17 Jun 2009, Published online: 01 Dec 2010
 
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Abstract

We characterized the effect of nitrogen (N) fertilizer on root morphology, photosynthetic pigments and cadmium (Cd) accumulation in a series of hydroponic experiments by using hyper-accumulating ecotype of Sedum alfredii H. (HE) and non-hyperaccumulating ecotype (NHE) plants. Cd accumulation in both ecotypes increased with increase of N levels until it reached the peak at 16 mM and then decreased suddenly. Among all the three N forms tested, ammonium sulfate [(NH4)2SO4] was found to be an optimum choice. Based on these findings, a pot experiment was also conducted to evaluate the effect of three N fertilizers on phytoextraction from a slightly Cd-contaminated soil by the hyper-accumulating plant Sedum alfredii H.

ACKNOWLEDGMENTS

The present research was financially supported by a key project from the National Natural Science Foundation of China (#30630046), “863” Target Goal Project from Ministry of Science of China (#2006AA06Z386), and key tackling project from Shanghai Agricultural Commission (#2004SA).

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