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项敬银,俞飞,伊力塔,陈敏斯.模拟酸雨和镉复合处理对秃瓣杜英生长和荧光参数的影响.生态学报,2018,(15).http://dx.doi.org/10.5846/stxb201708221511  
模拟酸雨和镉复合处理对秃瓣杜英生长和荧光参数的影响
Combined effects of artificial acid rain and Cd on the growth and fluorescence parameters of Elaeocarpus glabripetalus
投稿时间:2017-08-22  修订日期:2018-03-11
DOI: 10.5846/stxb201708221511
关键词酸雨  重金属  生物量  荧光参数  秃瓣杜英
Key Wordsacid rain  heavy metals  biomass  fluorescence parameters  Elaeocarpus glabripetalus
基金项目
作者单位E-mail
项敬银 浙江农林大学省部共建亚热带森林培育国家重点实验室 572264083@qq.com 
俞飞 浙江农林大学省部共建亚热带森林培育国家重点实验室  
伊力塔 浙江农林大学省部共建亚热带森林培育国家重点实验室 yilita@126.com 
陈敏斯 浙江农林大学省部共建亚热带森林培育国家重点实验室  
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摘要:
通过盆栽试验研究了模拟酸雨(pH 3.0和pH 5.6)和镉(Cd 50和Cd 100)复合污染以及对照处理(CK)对秃瓣杜英(Elaeocarpus glabripetalus)的生长和生理指标的影响。结果表明:单独的酸雨处理显著增加了植株总生物量的积累,促进了根和叶片生物量的分配,降低了茎干生物量的分配,且显著降低了叶片中的镉含量。单独镉处理下,Cd 50显著增加了植株生物量的积累,促进了根和叶片生物量的分配,Cd 100虽抑制了植株生物量的积累,但生物量分配几乎不受影响。复合处理促进了植株根和叶片生物量的分配,降低茎干生物量分配,且降低了根冠比,其中pH 5.6+Cd 100显著促进了植株生物量的积累。所有处理的荧光参数与对照无显著差异,说明未对植株的PSⅡ反应中心产生显著影响。镉在植株体内的积累为:根>茎>叶。酸雨强度和镉浓度的交互作用对生物量,镉含量和F0影响显著。因此,秃瓣杜英对酸雨和镉的复合污染有较强的耐受能力。
Abstract:
A pot experiment was conducted to study the effects of different acid gradients (pH 3.0 and pH 5.6), different cadmium concentrations (Cd 50 and Cd 100), and their combination (pH 3.0 + Cd 100, pH 5.6 + Cd 50 and pH 5.6 + Cd 100), as well as the control treatment (CK) on the growth and physiological indexes of Elaeocarpus glabripetalus. The results showed that the addition of single acid rain [I’m not sure what you mean by “single acid rain” here; are you referring to a specific treatment? Please specify.][I mean the plant only suffered to acid treatment , including pH3.0 and pH5.6. Thanks for your question.]significantly increased the accumulation of total biomass, promoted the distribution of root and leaf biomass, reduced the distribution of stem biomass, and reduced the cadmium content in leaves. Cadmium alone (Cd 50) significantly increased the accumulation of plant biomass and promoted the distribution of root and leaf biomass. Cd 100 inhibited biomass accumulation, but the biomass allocation was largely unaffected. Their combination promoted the distribution of root and leaf biomass, reduced the distribution of stem biomass, and reduced the root-to-shoot ratio, and pH 5.6 + Cd 100 significantly promoted the accumulation of plant biomass. There were no significant differences in the fluorescence parameters between all treatments, indicating that there was no significant effect on the PSⅡ reaction center of the plants. The accumulation of cadmium in the plant was in the order of root > stem > leaf. The interaction of acid rain intensity and cadmium concentration had significant effects on biomass, cadmium content, and F0. Therefore, E. glabripetalus has strong tolerance to acid rain and cadmium complex pollution.
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