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| 红壤中La的生物富集及其对玉米幼苗生长影响研究 | |
| 作者姓名： | HU Xin WANG Xiao-Rong WANG Chao |
| 作者单位： | [1]State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science, Nanjing University, Nanjing 210093 （China） [2]School of Environmental Science and Engineering, Hohai University, Nanjing 210098 （China） |
| 基金项目： | 江苏省自然科学基金;国家自然科学基金 |
| 摘 要： | 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. |
| 关 键 词： | 生物累积 玉米 红壤 种质资源 镧 |
| 收稿时间： | 2006-02-27 |
| 修稿时间： | 2006-07-06 |
Bioaccumulation of lanthanum and its effect on growth of maize seedlings in a red loamy soil |
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| HU Xin,WANG Xiao-Rong,WANG Chao.Bioaccumulation of lanthanum and its effect on growth of maize seedlings in a red loamy soil[J].Pedosphere,2006,16(6):799-805. | |
| Authors: | HU Xin WANG Xiao-Rong and WANG Chao |
| Institution: | aState Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science, Nanjing University, Nanjing 210093 (China) bSchool 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. |
| Keywords: | bioaccumulation growth lanthanum maize seedlings red loamy soil |
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