| 王荣,刘艳丽,张民,高翔,李成亮.纳米银对黑麦草生长特性的影响[J].农业环境科学学报,2015,34(4):639-645. |
| 纳米银对黑麦草生长特性的影响 |
| Effects of Nano-silver on Growth Characteristics of Perennial Ryegrass |
| 投稿时间：2014-11-02 |
| DOI：10.11654/jaes.2015.04.005 |
| 中文关键词: 纳米银 根系 植物毒性 黑麦草 |
| 英文关键词: nano-silver root system phytotoxicity ryegrass |
| 基金项目:国家自然科学基金项目(21377074) |
| 作者 | 单位 | E-mail | | 王荣 | 土肥资源高效利用国家工程实验室, 山东农业大学资源与环境学院, 山东 泰安 271018 | | | 刘艳丽 | 土肥资源高效利用国家工程实验室, 山东农业大学资源与环境学院, 山东 泰安 271018 | | | 张民 | 土肥资源高效利用国家工程实验室, 山东农业大学资源与环境学院, 山东 泰安 271018 | | | 高翔 | 土肥资源高效利用国家工程实验室, 山东农业大学资源与环境学院, 山东 泰安 271018 | | | 李成亮 | 土肥资源高效利用国家工程实验室, 山东农业大学资源与环境学院, 山东 泰安 271018 | chengliang_li11@163.com |
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| 中文摘要: |
| 利用土壤盆栽试验,以硝酸银作对照,探讨了纳米银对黑麦草生长特性的影响。结果表明,纳米银和硝酸银对植株根系的抑制作用均大于对地上部的抑制作用,银浓度为20 mg·kg-1的纳米银与硝酸银处理根冠比最大,分别为2.43、2.33,说明低浓度银对植物生长有促进作用。当纳米银浓度大于20 mg·kg-1时,随浓度增加黑麦草生物量下降,根系长度减小,平均直径增加,根尖数减少,并且纳米银对黑麦草根系生态学特性的抑制作用强于同浓度普通银离子,说明纳米银对植物毒害的机理不只是因为纳米银能转化为离子态银,还与其粒径小、比表面活性高等纳米特性有关。 |
| 英文摘要: |
| Nanoscale-silver containing products have been widely utilized in the industrial and domestic manufactures. Thus nano-silver particles may enter the terrestrial environment. However, there is little information available about the influence of nano-silver on plant growth. A pot experiment was carried out to examine the effect of nano-silver on the growth of and nano-silver residues in perennial ryegrass in comparison with AgNO3 treatment. Results showed that the inhibitory effect of nano-silver and AgNO3 on the root was significantly greater than on the aboveground. When the concentration of nano-silver was at 20 mg·kg-1 in soil, the greatest ratios of root to shoot were all recorded as 2.43 and 2.33 in nano-silver and AgNO3 treatments, respectively. Additions of silver decreased the biomass, root length and root number of ryegrass, but increased the average diameter of roots until 20 mg·kg-1 of nano-silver in soil. Nano-silver showed greater inhibition of ryegrass root system than AgNO3 did. This suggested that the toxicity mechanism of nano-silver to plant was not only silver ion from nano-silver, but also the small particle size and high active surface. The present results would provide valuable information on the environmental risk assessment and remediation of of nano-silver pollution. |
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