| 土壤锌铅镉污染对小白菜硝酸盐含量的影响 |
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| 引用本文： | 魏成熙,张旭.土壤锌铅镉污染对小白菜硝酸盐含量的影响[J].西南农业大学学报,2005,27(4):436-438. |
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| 作者姓名： | 魏成熙 张旭 |
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| 作者单位： | 贵州大学生命科学学院,贵州贵阳550025 |
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| 基金项目： | 贵州省教育厅基金资助项目（2003-08-23） |
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| 摘 要： | 通过盆栽试验,研究了土壤锌、铅、镉污染对小白菜体内硝酸盐、亚硝酸盐含量的影响.结果表明：在供试浓度范围内,小白菜的生长效应与重金属施用水平有关,表现为小白菜的生长量随着铅、镉施用水平的增高而降低,差异达极显著水平（T＞t0.01）.锌处理组小白菜生长量则随着浓度的增加而增大.小白菜中硝酸盐含量随重金属施用量的增加而增加,差异达极显著水平（T＞t0.01）.其硝酸盐累积量高低依次为镉污染处理组、铅污染处理组、锌污染处理组;在重金属的单一污染中,小白菜硝酸盐累积量与其受污染程度呈正相关.
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| 关 键 词： | 锌 铅 镉 小白菜 硝酸盐 亚硝酸盐 |
| 文章编号： | 1000-2642（2005）04-0436-03 |
| 收稿时间： | 2004-10-20 |
| 修稿时间： | 2004-10-20 |
EFFECTS OF ZINC LEAD AND CADMIUM CONTAMINATION ON NITRATE CONTENTS IN PAKCHOI |
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| WEI Cheng - xi, ZHANG Xu.EFFECTS OF ZINC LEAD AND CADMIUM CONTAMINATION ON NITRATE CONTENTS IN PAKCHOI[J].Journal of Southwest Agricultural University,2005,27(4):436-438. |
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| Authors: | WEI Cheng - xi ZHANG Xu |
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| Institution: | Institute of Life Science, Guizhou University, Guiyang, Guizhou, 550025, China |
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| Abstract: | The influences of zinc, lead and cadmium contamination on nitrate and nitrite contents in pakchoi (Brassica parichinensis) were investigated in a pot experiment. In the range of zinc, lead and cadmium levels adopted in this experiment, the growth of pakchoi was correlated negatively with Pb and Cd (T>t_(0.01)) and positively with Zn. Nitrate concentration in the plants increased with the levels of the heavy metals, the effect being significant statistically (T>t_(0.01)). Nitrate accumulation appeared in various treatments in the order of Cd > Pb > Zn. When the soil was treated with a single heavy metal, nitrate accumulation was positively correlated with the degree of heavy metal contamination of the soil. |
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| Keywords: | zinc lead cadmium pakchoi nitrate nitrite |
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