Effects of Polychlorinated Dibenzo-p-dioxins on Soil Nutrition, Soil CO2 Emission, and Mung Bean Seedling Growth | |
Liu, Qiang1,2; Chen, Yiping1; Sun, Benhua3 | |
2015-03-01 | |
发表期刊 | WATER AIR AND SOIL POLLUTION |
ISSN | 0049-6979 |
卷号 | 226期号:3 |
文章类型 | Article |
摘要 | Dioxins are a group of persistent organic pollutants with varying degrees of toxicity. To determine the effects of polychlorinated dibenzo-p-dioxins pollution on soil nutrition, soil carbon dioxide (CO2) emission, and plant growth, soils and mung bean seedlings were experimentally subjected to 1,2,3,7,8-pentachlorodibenzo-para-dioxin (PeCDD). The results showed that: (i) Low dose of PeCDD treatments led to a significant decrease in the soil organic matter content and an increase in the hydrolyzable nitrogen content, while the contents of available phosphorus and exchangeable potassium decreased significantly at high doses of PeCDD (>= 20 ng kg(-1)). (ii) The soil CO2 release rate was gradually increased from treatments with 10 to 20 ng kg(-1) PeCDD, but decreased significantly with 30 ng kg(-1) PeCDD treatment after 25 days exposure. With prolonged exposure time, the soil CO2 emission after all treatments declined heavily, along with the difference among different treatments. (iii) Low dose of 10 ng kg(-1) PeCDD resulted in significant reductions of malondialdehyde (MDA) content and electrolyte leakage conductivity and increases in the contents of chlorophyll and soluble protein and fresh biomass of mung bean seedlings. On the contrary, high doses of PeCDD (>= 20 ng kg(-1)) treatments showed opposite effects on the above parameters of seedling growth. The results suggested that high doses of PeCDD contamination (>= 20 ng kg(-1)) posed potential negative effects on the cycling processes of soil nutrients, which were probably due to the inhibitory on soil microbial activity, and induced phytotoxicity on seedling growth, although slight stimulations of soil microbial activity and mung bean seedling growth were found at low doses of PeCDD. Therefore, more efforts are needed to ensure the dioxin contamination below the toxic concentration of 20 ng TEQ kg(-1) in farmland soil. |
关键词 | Polychlorinated Dibenzo-p-dioxins Soil Nutrition Soil Co2 Emission Phytotoxicity Dioxins Pollution |
WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
DOI | 10.1007/s11270-015-2294-9 |
关键词[WOS] | Elevated-temperature ; Available Phosphorus ; Microbial Biomass ; Organic-carbon ; Nitric-oxide ; Salt Stress ; In-situ ; China ; Respiration ; Plants |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences ; Water Resources |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences ; Water Resources |
WOS记录号 | WOS:000351102400011 |
出版者 | SPRINGER |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9334 |
专题 | 生态环境研究室 |
通讯作者 | Chen, Yiping |
作者单位 | 1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Qiang,Chen, Yiping,Sun, Benhua. Effects of Polychlorinated Dibenzo-p-dioxins on Soil Nutrition, Soil CO2 Emission, and Mung Bean Seedling Growth[J]. WATER AIR AND SOIL POLLUTION,2015,226(3). |
APA | Liu, Qiang,Chen, Yiping,&Sun, Benhua.(2015).Effects of Polychlorinated Dibenzo-p-dioxins on Soil Nutrition, Soil CO2 Emission, and Mung Bean Seedling Growth.WATER AIR AND SOIL POLLUTION,226(3). |
MLA | Liu, Qiang,et al."Effects of Polychlorinated Dibenzo-p-dioxins on Soil Nutrition, Soil CO2 Emission, and Mung Bean Seedling Growth".WATER AIR AND SOIL POLLUTION 226.3(2015). |
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