土壤盐分离子对乌鲁木齐小白菜Pb含量的影响研究

李萍; 李阳; 李柯; 王文全; 刘师豆; 吴相南

文章摘要

土壤盐分离子对乌鲁木齐小白菜Pb含量的影响研究

Effect of Salt Ions in Soil on Pb Content of Chinese Cabbage (Brassica campestris L. ssp.)in Urumqi, China

投稿时间：2017-08-18 修订日期：2018-01-05

DOI：10.13254/j.jare.2017.0209

中文关键词: 土壤，盐分，小白菜，Pb，影响

英文关键词: soil, salt, Chinese cabbage (Brassica campestris L.ssp.), Pb, effect

基金项目:国家自然科学基金项目（21267022）；新疆维吾尔自治区土壤与植物生态过程重点实验室资助项目

作者	单位	E-mail
李萍	新疆农业大学草业与环境科学学院, 新疆乌鲁木齐 830052
李阳	新疆农业大学草业与环境科学学院, 新疆乌鲁木齐 830052
李柯	新疆农业大学草业与环境科学学院, 新疆乌鲁木齐 830052
王文全	新疆农业大学草业与环境科学学院, 新疆乌鲁木齐 830052	wwq6804@163.com
刘师豆	新疆农业大学草业与环境科学学院, 新疆乌鲁木齐 830052
吴相南	新疆农业大学草业与环境科学学院, 新疆乌鲁木齐 830052

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中文摘要:

为研究土壤中盐分离子对小白菜Pb含量的影响，采取正交试验L₁₆ 4⁵和盆栽试验方法，分析了5种阳离子（Ca²⁺、Mg²⁺、K⁺、Na⁺、Pb²⁺）和3种阴离子（SO₄^2-、Cl^-、NO₃^-）对小白菜地上部和根系中Pb含量的影响。结果表明，试验条件下小白菜地上部Pb含量为0.215~0.930 mg·kg^-1，根系中Pb含量为1.648~24.33 mg·kg^-1，可食用部分超标率达81.3%。土壤盐分离子对小白菜地上部Pb含量影响顺序为： Ca²⁺ > Mg²⁺ > Na⁺ > Pb²⁺ > K⁺。根据相关性分析，土壤中Ca²⁺与小白菜地上部Pb含量呈显著负相关（r=-0.540 3，P<0.05），Na⁺和Pb²⁺呈正相关但不显著。Mg²⁺和K⁺呈负相关，也不显著。Cl^-和NO₃^-与小白菜地上部Pb含量呈显著负相关（r=-0.540，P<0.05），SO₄^2-呈正相关，但不显著。对小白菜根系Pb含量影响顺序为： Pb²⁺ > K⁺ > Na⁺ > Ca²⁺ > Mg²⁺，土壤中Pb²⁺对小白菜根系Pb的含量呈显著正相关（r=0.483，P<0.05），Ca²⁺、Mg²⁺、K⁺、Na⁺、SO₄^2-、Cl^-和NO₃^-相关性不显著。乌鲁木齐土壤中固有的盐分离子对小白菜可食用部分Pb的吸收没有抑制作用。

英文摘要:

In order to study the effect of soil salt ions on Pb content in Chinese cabbage(Brassica campestris L. ssp.), the methods of orthogonal experiment L₁₆ 4⁵ and pot experiment were adopted, and five cations (Ca²⁺, Mg²⁺, K⁺, Na⁺, Pb²⁺)and three anions (SO₄^2-, Cl^-, NO₃^-)in the soil on Pb content in the aboveground part and root of Chinese cabbage were analyzed. The results showed that the Pb content was 0.215~0.930 mg· kg^-1 in the aboveground part, 1.648~24.33 mg·kg^-1 in the root, and 81.3% in the edible part exceeded the limit. The impact of those factors on Pb content in the aboveground part of Chinese cabbage was:Ca²⁺ > Mg²⁺ > Na⁺ > Pb²⁺ > K⁺. According to correlation analysis, Ca²⁺ in soil had a significantly negative correlation with Pb content in the aboveground part of Chinese cabbage(r=-0.540 3, P<0.05), Na⁺ and Pb²⁺ were positively correlated to an insignificant difference; Mg²⁺ and K⁺ were negatively correlated but not significant either. Cl^- and NO₃^- in soil had a significantly negative correlation with Pb content in the aboveground part (r=-0.540 3, P<0.05), and with SO₄^2- insignificantly and positively correlated. The impact of those factors on Pb content in the root of Chinese cabbage was:Pb²⁺ > K⁺ > Na⁺ > Ca²⁺ > Mg²⁺; Pb²⁺ in soil had a significantly positive correlation with Pb in the root of Chinese cabbage, while Ca²⁺, Mg²⁺, Na⁺, K⁺, SO₄^2-, Cl^- and NO₃^-, showing an insignificantly correlation. The salt ions inherent in the soil in Urumqi caused no inhibition on Pb absorption in the edible part of Chinese cabbage.

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