东北地区芦苇-土壤系统中氯离子、硝酸根和硫酸根空间变异初探

卢美娇; 介冬梅; 高贵在; 高卓

doi:10.11829/j.issn.1001-0629.2014-0183

东北地区芦苇-土壤系统中氯离子、硝酸根和硫酸根空间变异初探

东北师范大学地理科学学院,吉林长春 130024

基金项目:

环保行业公益项目(201109067)

国家自然科学基金项目(40971116)

高校基本业务费前瞻性基金项目(10JCXK010)

摘要: 土壤中适量的无机阴离子可促进植物的生长,而过量的无机阴离子则会造成土壤盐渍化,因此探讨土壤中无机阴离子的空间变异规律对盐渍化的治理和生态恢复具有重要意义。本研究用离子色谱分析的方法,测验出东北地区12个样点6-10月土壤和芦苇(Phragmites communis)中的Cl-、NO3-和SO42-含量,初步分析了东北地区芦苇-土壤系统中Cl-、NO3-和SO42-空间变异规律及其成因。结果表明,东北地区土壤中Cl-、NO3-和SO42-平均含量分别为292.67、297.14和367.49 mg·kg-1。3种阴离子总量空间分布受海水入侵、土壤理化性质和水热条件的影响,表现为有海水入侵的丹东、盘锦和内陆盐渍区的大庆含量较多。土壤中Cl-含量的空间分异主要受海水入侵、土壤盐渍化程度和人为活动的影响,盘锦、丹东和大庆较高,长春、讷河和长岭次之,受人为活动影响较少的内陆非盐渍区最低;土壤中NO3-含量的空间分异受植物需求量和水热条件的影响,牡丹江、通辽、丹东、龙湾、讷河等生物固氮量多和水热条件偏暖湿的样点NO3-含量偏高;土壤中SO42-含量的空间分异主要受降水量的影响,降水量较少的讷河、大庆等地土壤中SO42-含量较高。芦苇对土壤中3种阴离子的吸收形式以主动运输为主。

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English

Spatial variation characteristics of chloride, nitrate and sulfate in Phragmites communis soil system, Northeast China

School of geographical sciences of Northeast Normal University Northeast Normal University, Changchun 130024, China

Received Date: 2014-04-10
Publish Date: 2014-11-14

Abstract: The appropriate amount of inorganic anions in soil could promote the growth of plant, while the excess amount of anions could lead to soil salinization. The research about the spatial variation characteristics of inorganic anions in soil was of great significance to salinization control and ecological restoration. The present research analyzed the contents of the chloride (Cl-), nitrate (NO3-) and sulfate (SO42-) by ion chromatography in soil of Phragmites communis from sampling sites in Northeast China of 12, from June to October in 2011. The results showed that the average contents of chloride, nitrate and sulfate were 292.67, 297.14 and 367.49 mg·kg-1, respectively. The space distribution of the total content of the three tested anions was affected by seawater intrusion, physi-chemical property of soil and hydrothermal conditions. Dandong and Panjin where soil affected by seawater intrusion had higher contents of anions in soil compared with Daqing which heavier soil salinization. The distribution of the total content of the three anions from June to October was affected by hydrothermal condition and the requirement of P. communis from June to October. The content of anion was the highest in June which decreased from July with the change of hydrothermal conditions and growth period. The content of chloride in soil was influenced by seawater intrusion, degree of soil salinization and human activities. All of Dandong and Panjin in which soil affected by seawater intrusion, Daqing and Changling in which soil salinization was heavier, and Changchun and Nehe in which soil affected by human activities had higher content of chloride in soil. Nitrate content in soil was influenced by hydrothermal conditions and the requirement of P. communis. Mudanjiang, Tongliao, Dandong, Longwan and Nehe which had warmer and wetter hydrothermal conditions had higher nitrate in soil. The space distribution of sulfate content was affected by precipitation. There were higher sulfate contents in soil in the areas with fewer precipitation such as Nehe and Daqing. The transportation of the three anions in P. communis was active.

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东北地区芦苇-土壤系统中氯离子、硝酸根和硫酸根空间变异初探

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Spatial variation characteristics of chloride, nitrate and sulfate in Phragmites communis soil system, Northeast China

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