【摘要】：為了探究檸檬酸和EDTA-Na_2對Pb污染下彩葉草(Coleus blumei)生長、Pb和營養(yǎng)元素N、P、K、Ca、Mg、Fe的吸收和轉(zhuǎn)運(yùn)特性的影響,設(shè)置對盆栽彩葉草澆灌6 mmol·L~(-1)的Pb(CH_3COO)_2,澆灌的同時(shí)分別加入1、5、10mmol·L~(-1)檸檬酸或1、5、10mmol·L~(-1) EDTA-Na_2,以及完全Hoogland營養(yǎng)液處理(對照),共8個(gè)處理。結(jié)果顯示,與對照相比,Pb處理降低彩葉草干重(P0.05)、含水量(P0.05)、根系活力(P0.05);除N(根中)、Ca(葉和根中)含量高于對照外,其它營養(yǎng)元素含量均降低,但均積累Pb。在Pb處理的同時(shí)加入1、5、10mmol·L~(-1)檸檬酸或1、5、10mmol·L~(-1) EDTA-Na_2后,彩葉草干重、含水量和根系活力均呈下降趨勢;Pb含量、Pb積累量、6種營養(yǎng)元素含量和轉(zhuǎn)運(yùn)系數(shù)的變化趨勢不完全相同。因此,添加檸檬酸1mmol·L~(-1)的強(qiáng)化地上部(葉和莖)Pb積累能力大于同一水平的EDTA-Na_2,而添加檸檬酸5或10mmol·L~(-1)的強(qiáng)化能力則小于同一水平的EDTA-Na_2,故一定濃度的檸檬酸或EDTA-Na_2具有強(qiáng)化彩葉草吸收土壤中Pb的作用。
[Abstract]:In order to investigate the effects of citric acid and EDTA-Na_2 on (Coleus blumei) growth, Pb and nutrient elements N, K, Ca, mg, Fe uptake and transport characteristics under Pb pollution, Pb (CH_3COO) _ 2 of 6 mmol 路L ~ (- 1) Pb (10mmol 路L ~ (- 1) was added to potted leafy grass at the same time, 5, 10mmol 路L ~ (- 1) citric acid or 1,5, 10mmol 路L ~ (- 1) EDTA-Na_2, were added respectively. And complete Hoogland nutrient solution treatment (control), a total of 8 treatments. The results showed that compared with the control, Pb treatment decreased dry weight (P 0.05), water content (P 0.05) and root activity (P 0.05), except N (), Ca (leaf and root content in root) decreased, but accumulated Pb.. After adding 1, 5, 10mmol 路L ~ (- 1) citric acid or 1, 5, 10mmol 路L ~ (- 1) EDTA-Na_2 to Pb treatment, the dry weight, water content and root activity of color leafy grass decreased, while the changes of Pb content, Pb accumulation, six nutrient element contents and transport coefficients were not the same. Therefore, the Pb accumulation ability of shoot (leaf and stem) supplemented with citric acid 1mmol 路L ~ (- 1) was greater than that of EDTA-Na_2, at the same level, while the enhancement ability of adding citric acid 5 or 10mmol 路L ~ (- 1) was lower than that of EDTA-Na_2, at the same level. Therefore, a certain concentration of citric acid or EDTA-Na_2 could enhance the absorption of Pb in soil.
【作者單位】： 安徽科技學(xué)院;
【基金】：安徽省科技廳攻關(guān)計(jì)劃項(xiàng)目(1301031030);安徽省科技廳農(nóng)業(yè)科技成果轉(zhuǎn)化項(xiàng)目(1404032007);安徽省科技廳年度重點(diǎn)科研項(xiàng)目(07020304093) 安徽科技學(xué)院重點(diǎn)學(xué)科風(fēng)景園林學(xué)(AKZDXK2015B01)
【分類號】：X173;X53;S682.36
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本文編號：2504361