Pedosphere 16(6): 799--805, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Bioaccumulation of lanthanum and its effect on growth of maize seedlings in a red loamy soil |
HU Xin1 , WANG Xiao-Rong1 and WANG Chao2 |
1 State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science, Nanjing University, Nanjing 210093 (China). E-mail: huxin_hx@yahoo.com.cn;
2 School of Environmental Science and Engineering, Hohai University, Nanjing 210098 (China) |
| ABSTRACT |
| 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-1 in 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. |
| Key Words: bloaccumulation, growth, lanthanum, maize seedlings, red loamy soil |
| Citation: Hu, X., Wang, X. R. and Wang, C. 2006. Bioaccumulation of lanthanum and its effect on growth of maize seedlings in a red loamy soil. Pedosphere. 16(6): 799-805. |
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