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不同粒径磷矿粉对玉米吸收积累重金属的影响 总被引:5,自引:0,他引:5
通过盆栽试验研究土壤中添加不同粒径磷矿粉对玉米吸收积累重金属的影响。结果表明,土壤中添加不同磷矿粉均可显著地降低玉米地上部和地下部的生物量。玉米植株对Cd、Zn、Cu和As的吸收积累也受不同粒径磷矿粉添加的影响。与对照处理相比,添加200μm、22μm和0.8μm的磷矿粉可导致玉米地上部Cd和As质量比分别降低14.1%~26.8%和15.4%~22.9%,玉米地上部Cu质量比和地下部As质量比分别提高5.2%~10.5%和56.3%~75.6%。与200μm和22μm相比,0.8μm磷矿粉可显著降低玉米根系对土壤Cu、Cd和Zn的吸收,说明该粒径磷矿粉是修复复合重金属污染土壤具有潜力的材料。 相似文献
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城市呼唤绿色城市人口集中,楼群密集,垃圾废弃物成灾,臭味噪声污染严重,城市生态失调,环境质量下降。改变这一切的重要措施之一,就是建立良性生态循环,开发城市绿色工程。城市乎唤绿色,人们盼望绿荫。天台是一片正在开垦的处女地,是化害为利建立良性生态植物园的广阔天地。天台大有文章可做,可写最迷人的小说,可画最新最美的图画。这是笔者发自内心的感慨! 相似文献
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Allelopathic effects of extracts from Solidago canadensis L.against seed germination and seedling growth of some plants 总被引:5,自引:0,他引:5
To investigate the potential role of allelopathy in plant interference and in the successful invasion of alien species Solidago canadensis, aqueous and ethanolic extracts from rhizomes, stems and leaves of S. canadensis were prepared and used as treatment solutions to assess their effects on seed germination and seedling growth in four target species, mulberry (Morus alba); morning glory (Pharbitis nil), wheat (Triticum aestivum) and rape (Brassiea campestris). Reduction and/or growth in germination and growth of the target plant species in the presence of both aqueous and ethanolic extracts at different concentrations indicated that the responses were species-specific and concentration-dependent. Generally, ethanolic extracts (especially from leaves) imposed stronger effects on both seed germination and seedling growth. Extracts with lower concentration at 0.001 g/ml dw could stimulate the seedling growth of rape and morning glory, whereas extracts at any given concentrations have inhibitory effects on wheat and mulberry. It is suggested that the aqueous and ethanolic extracts of all the three parts of S. canadensis have significant allelopathic effects. Although both inhibition and stimulation occurred in the germination and growth of the target species, extracts with higher concentrations definitely inhibit seed germination and seedling growth of all target plants. We suggest that allelopathy plays a more important role than other mechanisms do in the out-competition ofS. canadensis over other plants, and make it invasive in new habitats. 相似文献
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毛棉杜鹃地理分布及其开发利用 总被引:2,自引:0,他引:2
毛棉杜鹃为常绿灌木或小乔木,具有很高的观赏价值,介绍我国毛棉杜鹃的地理分布,生态学特性,阐述其优良特性以及开发利用的应用领域.结果表明:毛棉杜鹃具备优良的观赏特性和生态学特性,是一种极具发展潜力的园林植物材料.图2,表1,参8. 相似文献
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云南会泽铅锌矿矿渣废弃地植被重建初探 总被引:10,自引:0,他引:10
通过对云南会泽铅锌矿矿渣废弃地先锋植物群落进行实地考察后,根据植物的综合优势比及生物学特性,从建造先锋植被,覆盖表土,增施有机肥和改良剂方面,提出了矿渣废弃地植被重建的初步设想。这一设想可为其它矿渣废弃地的植被重建提供参考。 相似文献
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郑丕珍 《环境监测管理与技术》2001,13(5):41-42
以桂阳县某村 1998年 5月发生的一起大气污染事故为例 ,阐述了运用植物学方法推定大气污染及其方法、步骤。其主要步骤是 :事故现场调查 ,植物个体发育情况观察 ,植物器官受害症状观察 ,植物组织、细胞观察。方法是 :利用上述观察结果与《植物、大气污染检索表》和《植物、大气污染耐受力表》进行对照分析 ,推定植物是否受到大气污染的危害及其受害程度 相似文献