Can phosphate compounds be used to reduce the plant uptake of Pb and resist the Pb stress in Pb-cont

来源 :环境科学学报(英文版) | 被引量 : 0次 | 上传用户:zhurx180
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The effects of different phosphate-amendments on lead (Pb) uptake, the activities of superoxide dismutase (SOD) and the level of malondialdehyde (MDA) in cauliflower (Brassica oleracea L.) in contaminated soils with 2 500, 5 000 mg P2O5/kg soil of hydroxyapatite (HA), phosphate rock (PR), single-superphosphate (SSP) and the mix of HA/SSP (HASSP) were applied in pot experiments. Results showed that the Pb concentration in the shoots and roots was decreased in 18.3%-51.6% and 16.8%-57.3% among the treatments respectively compared to the control sample. The efficiency order of these phosphate amendments in reducing Pb uptake was followed as: HASSP≈ HA > SSP ≈ PR. With the addition of SSP, HA and the mix of HA/SSP, the SOD activity in the shoots was markedly reduced (P < 0.05) compared with that in control group, for example, the SOD activities in the shoots by the treatments of HASSP, SSP, and HA in 5 000 mg P2O5/kg were found to be only 51.3%, 56.2%, and 56.7%, respectively. The similar effects were also observed on the level of MDA in the shoots with the decrease in 24.5%-56.3%. The results verified the inference that phosphate compounds could be used to reduce the plant uptake of Pb and resist the Pb stress in the plant vegetated in Pb-contaminated soils.
其他文献
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
期刊
摘 要:畜牧业绿色发展是农业绿色发展的基础和重点领域,也是我国畜牧业转型升级的重要目标。传统畜牧业经济增长模式面临的资源环境约束、生产成本上涨、价格严重倒挂等问题日益突出,迫切需要转变发展方式,提高可持续发展能力和市场竞争能力。为此,要全面贯彻创新、协调、绿色、开放、共享的发展理念,尤其要以绿色发展理念为引领,探索一条绿色高效的现代畜牧业新路径。  关键词:环保;畜牧业;发展思路  推进畜牧业可持
期刊
期刊
期刊
期刊
[总体特征分析]rn芜湖素有“中国四大米市之一”之称,是安徽省第二大城市,也是安徽省除省城合肥外的经济、文化、交通、政治的次中心城市.2012年,芜湖市全年地区生产总值1 87