柠檬酸和EDTA对彩叶草Pb和营养元素吸收和转运特性的影响
发布时间：2019-06-21 21:20
【摘要】：为了探究柠檬酸和EDTA-Na_2对Pb污染下彩叶草(Coleus blumei)生长、Pb和营养元素N、P、K、Ca、Mg、Fe的吸收和转运特性的影响,设置对盆栽彩叶草浇灌6 mmol·L~(-1)的Pb(CH_3COO)_2,浇灌的同时分别加入1、5、10mmol·L~(-1)柠檬酸或1、5、10mmol·L~(-1) EDTA-Na_2,以及完全Hoogland营养液处理(对照),共8个处理。结果显示,与对照相比,Pb处理降低彩叶草干重(P0.05)、含水量(P0.05)、根系活力(P0.05);除N(根中)、Ca(叶和根中)含量高于对照外,其它营养元素含量均降低,但均积累Pb。在Pb处理的同时加入1、5、10mmol·L~(-1)柠檬酸或1、5、10mmol·L~(-1) EDTA-Na_2后,彩叶草干重、含水量和根系活力均呈下降趋势;Pb含量、Pb积累量、6种营养元素含量和转运系数的变化趋势不完全相同。因此,添加柠檬酸1mmol·L~(-1)的强化地上部(叶和茎)Pb积累能力大于同一水平的EDTA-Na_2,而添加柠檬酸5或10mmol·L~(-1)的强化能力则小于同一水平的EDTA-Na_2,故一定浓度的柠檬酸或EDTA-Na_2具有强化彩叶草吸收土壤中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.
【作者单位】： 安徽科技学院;
【基金】：安徽省科技厅攻关计划项目(1301031030);安徽省科技厅农业科技成果转化项目(1404032007);安徽省科技厅年度重点科研项目(07020304093) 安徽科技学院重点学科风景园林学(AKZDXK2015B01)
【分类号】：X173;X53;S682.36
，
本文编号：2504361
[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.
【作者单位】： 安徽科技学院;
【基金】：安徽省科技厅攻关计划项目(1301031030);安徽省科技厅农业科技成果转化项目(1404032007);安徽省科技厅年度重点科研项目(07020304093) 安徽科技学院重点学科风景园林学(AKZDXK2015B01)
【分类号】：X173;X53;S682.36
，
本文编号：2504361
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