| 龙思斯,宋正国,雷鸣,喻理,王艺康,蒋宏芳,沈跃.不同外源镉对水稻生长和富集镉的影响研究[J].农业环境科学学报,2016,35(3):419-424. |
| 不同外源镉对水稻生长和富集镉的影响研究 |
| Growth and Cd accumulation of rice(Oryza sativa L.) grown in soils amended with Cd from different pollution sources |
| 投稿时间：2015-11-09 |
| DOI：10.11654/jaes.2016.03.002 |
| 中文关键词: 水稻 镉 土壤污染源 灌溉水污染源 叶面污染源 糙米 |
| 英文关键词: rice plant cadmium soil pollution source irrigation water pollution source atmospheric pollution source brown rice |
| 基金项目:国家863项目子课题(2012AA10404-5);湖南省安邦农业研究院资助项目 |
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| 中文摘要: |
| 为了探究不同来源镉对水稻富集镉的影响,通过盆栽种植水稻实验,以外源添加镉方式分别模拟土壤镉污染源、灌溉水镉污染源和大气降水镉污染源,对水稻的生长及其镉的含量和分布特征进行分析。结果表明:与对照相比,三种不同污染源中镉的含量对水稻株高以及稻谷的重量无显著影响(P>0.05)。水稻植株各部位的镉含量随着污染源中镉浓度的升高而显著增加(P<0.05),其中土壤污染和灌溉水污染处理下水稻植株中镉含量分布为根 >茎 >叶 >谷壳 >糙米,叶面污染为叶 >根 >茎 >谷壳 >糙米。无论是在同一污染源不同镉浓度还是不同单一污染源下,糙米中镉的含量与叶面中镉的含量呈显著线性关系(P<0.05)。三种污染源对糙米富集镉的贡献顺序为叶面污染源 >灌溉水污染源 >土壤污染源。 |
| 英文摘要: |
| Cadmium from different pollution sources may have different bioavailability, thus showing various effects on plants. Here an experiment was carried out to study the effects of different sources of Cd on growth and Cd uptake of rice(Oryza sativa L.) under greenhouse condition. Cadmium was added to soil-rice system via mixing soil with Cd2+-containing solution, irrigating water and leaf-spraying to simulate soil pollution, irrigation water pollution, and atmospheric deposit pollution sources, respectively. Compared with the control, there were no significant differences in plant height and grain yields of rice among three different Cd pollution sources(P>0.05), while the contents of Cd in rice plants significantly increased(P<0.05) with increasing Cd concentrations in three pollution sources. The distributions of Cd in rice plants treated with soil pollution and irrigation water pollution sources were:root >stem >leaf >husk >brown rice, whereas it was leaf >root >stem >husk >brown rice under atmospheric Cd pollution. Significant linear relationship(P<0.05) was found between Cd content in leaves and in husks of rice in the same Cd pollution source, or across different pollution sources. The highest concentration of Cd in brown rice was observed under atmospheric pollution source, followed by irrigation water pollution and soil pollution sources, suggesting that enrichment of Cd in brown rice decreased in order of atmospheric pollution >irrigation water pollution >soil pollution. |
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