Bioaccumulation of Lanthanum and Its Effect on Growth of Maize Seedlings in a Red Loamy Soil

HU Xin; WANG Xiao-Rong; WANG Chao

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Bioaccumulation of Lanthanum and Its Effect on Growth of Maize Seedlings in a Red Loamy Soil

机译：红壤土上镧的生物累积及其对玉米幼苗生长的影响

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Through a pot culture lanthanum nitrate was applied to maize seedlings grown in a red loamy soil to investigate the physiological and toxic effects of added La on the growth of crop seedlings and La bioaccumulation to help understand the environmental chemistry behaviors of rare earth element as fertilizers in soils. Compared to the control, La concentrations in shoots and especially in roots of maize seedlings increased with an increase of La in the soil. Also, with added concentrations of La ＞ 0.75 g La kg-1 soil and ＞ 0.05 g La kg-1 soil, the dry weight of shoots and roots of maize seedlings was significantly reduced (P ≤ 0.05), respectively, compared with the control. Additionally, La ≥ 0.5 g kg-1in the soil significantly inhibited (P ≤ 0.05) primary root elongation. Roots were more sensitive to La stress than shoots and thus could be used as a biomarker to La stress. Overall, in the red loamy soil studied, La had no significant beneficial effects on the growth of maize at the added La levels above 0.1 g kg-1 soil.

机译：通过盆栽培养，将硝酸镧应用于在红壤土上生长的玉米幼苗，研究添加的La对作物幼苗生长和La生物积累的生理和毒性作用，以帮助了解稀土元素在肥料中的环境化学行为。土壤。与对照相比，随着土壤中La的增加，芽中，尤其是玉米幼苗的根中的La浓度增加。另外，当添加La＞ 0.75 g La kg-1土壤和＞ 0.05 g La kg-1土壤时，与对照相比，玉米幼苗的芽和根的干重分别显着降低（P≤0.05）。。此外，土壤中La≥0.5 g kg-1显着抑制（P≤0.05）初生根伸长。根部对La胁迫的敏感性高于芽，因此可以用作La胁迫的生物标记。总体而言，在研究的红色壤土土壤中，添加的La含量高于0.1 g kg-1时，La对玉米的生长没有明显的有利影响。

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《土壤圈（英文版）》 |2006年第6期|799-805|共7页
作者
HU Xin; WANG Xiao-Rong; WANG Chao;
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作者单位

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science, Nanjing University,Nanjing 210093(China);

State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science, Nanjing University,Nanjing 210093(China);

School of Environmental Science and Engineering, Hohai University, Nanjing 210098(China);

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
bioaccumulation; growth; lanthanum; maize seedlings; red loamy soil;

机译：生物积累;生长;镧;玉米幼苗;红色壤土;

Bioaccumulation of Lanthanum and Its Effect on Growth of Maize Seedlings in a Red Loamy Soil

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