苏打盐渍土地区芦苇地土壤盐分离子空间变异与群落关系研究  

SPATIAL VARIATION OF SOIL SALINE IONS AND ITS RELATIONS WITH VEGETATION COMMUNITY OF PHRAGMITES AUSTRALIS IN A SALINE-SODIC SOIL

作　　者：杨帆[1] 邓伟[2] 章光新[1] 杨建锋[3] 李秀军[1] 

机构地区：[1]中国科学院东北地理与农业生态研究所 [2]中国科学院水利部成都山地灾害与环境研究所,成都610041 [3]中国地质调查局发展研究中心,北京100083

出　　处：《土壤学报》2008年第4期594-600,共7页Acta Pedologica Sinica

基　　金：国家自然科学基金项目(40501010);中国科学院知识创新项目(KZCX2-YW-126)资助

摘　　要：对松嫩平原西部苏打盐渍土地区芦苇小区土壤盐分离子和植被群落进行了分析，结果表明土壤盐分离子空间变异显著，四种阳离子（Na^＋、K^＋、Ca^2＋、Mg^2＋）变异系数为0．60～1．22，四种阴离子（HCO3^-、CO3^2-、Cl^-、SO4^2-）变异系数为0．35～1．41。离子中，Na^＋在阳离子中含量最高，HCO3^-在阴离子中含量最高。群落间比较，碱茅＋芦苇群落八大离子浓度均大于芦苇群落（P〈0．05）。且土壤电导率、pH，以及株高、生物量、覆盖度也高于芦苇群落（P〈0．01），因此随着土壤电导率、离子浓度的增加，芦苇小区土壤碱化程度加重，植被生长指标减小，植被群落也由芦苇群落向含有碱地植被的碱茅＋芦苇群落过渡。Distributions of soil saline ions and vegetation communities were studied in Phragmites communis land. Results indicate that spatial variation of soil saline ions was significant, with variation coefficient of the four types of cations （Na^＋ , K^＋ , Ca^2＋ , Mg^2＋） ranging from 0.60 to 1.22, and of the four types of anion （HCO3^-, CO3^2- , Cl^-, SO4^2- ） from 0.35 to 1.41. Among the eight types of ions, Na^＋ was the highest in content among the four cations, and HCO3^- among the four anions. Comparison between vegetation communities show that PuccineUia tenuiflora ＋ Phragmites communis community was higher than Phragmites communis community in concentrations of the eight ions （p 〈 0. 05 ）, and in soil EC, soil pH, plant height, and biomass as well （p 〈 0.01 ）. So with increasing soil electric conductivity and ion concentration, soil alkalinity increases, vegetation growth index decreases, and vegetation community turns from Phragmites communis community to PuccineUia tenuiflora ＋ Phragmites communis community.

关 键 词：盐分离子 芦苇 群落分布 苏打盐渍土 

分 类 号：S156.4[农业科学—土壤学]