Effects of Nitrogen Fertilizer on Growth and Cadmium Accumulation in Hyperaccumulator of Sedum alfredii Hance

LI Ji-guang; LI Ting-qiang; ZHU En; YANG Xiao-e; LIN Guo-lin; LIU Dan; HAN Xiao-ri; ZHANG Yu-long

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Effects of Nitrogen Fertilizer on Growth and Cadmium Accumulation in Hyperaccumulator of Sedum alfredii Hance

更新时间：2024-11-07

- Effects of Nitrogen Fertilizer on Growth and Cadmium Accumulation in Hyperaccumulator of Sedum alfredii Hance
- Vol. 21, Issue 1, Pages: 54-58(2007)
- 作者机构：
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  CLC： X53
- Published：2007
- 稿件说明：
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LI Ji-guang, LI Ting-qiang, ZHU En, et al. Effects of Nitrogen Fertilizer on Growth and Cadmium Accumulation in Hyperaccumulator of Sedum alfredii Hance[J]. 2007, 21(1): 54-58.
DOI：

LI Ji-guang, LI Ting-qiang, ZHU En, et al. Effects of Nitrogen Fertilizer on Growth and Cadmium Accumulation in Hyperaccumulator of Sedum alfredii Hance[J]. 2007, 21(1): 54-58. DOI：

摘要

通过水培试验

研究了氮素水平对超积累植物东南景天植株生长和镉吸收积累的影响。结果表明

在一定范围内供氮（4.0-16.0 mm ol/L）能明显促进东南景天的生长

随着氮素水平的升高

地上部和根系的生物量也提高

在供氮水平为16.0 mm ol/L时达到最大值

而当供氮水平≥32.0 mm ol/L时

东南景天的生长受到严重的抑制

其地上部和根系的生物量开始下降

各项根系形态的指标（包括根系长度、根系表面积、根系直径、根系体积）均有所降低。氮对东南景天体内镉积累有一定的促进作用

随着氮素用量的增加

体内镉含量逐渐升高

与生物量不同

镉含量在氮水平32.0 mm ol/L条件下达到最大。研究结果表明

适当提高营养液氮素水平

有利于东南景天的生长和镉吸收

为进一步利用东南景天修复镉污染土壤

提高修复效率提供科学依据。

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Related Institution

College of Resources and Environment,Hunan Agricultural University

Key laboratory for Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences

Institute of Soils and Fertilizers of Hunan Province

Institute of Mountain Hazards and Environment， Chinese Academy of Sciences

University of Chinese Academy of Sciences

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