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• 技术与方法 • 上一篇    

松嫩平原盐碱土饱和浸提液与土水比1∶5浸提液间化学参数的换算关系

迟春明1,2;王志春1   

  1. 1中国科学院东北地理与农业生态研究所, 长春130012; 2中国科学院研究生院, 北京100039
  • 收稿日期:2008-04-25 修回日期:1900-01-01 出版日期:2009-01-10 发布日期:2009-01-10

Conversion relationships between the chemical parameters in saturated and in 1∶5 soil/water extracts of saline and alkaline soils in Songnen Plain of Northeast China.

CHI Chun-ming1,2;WANG Zhi-chun1   

  1. 1Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Changchun 130012, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2008-04-25 Revised:1900-01-01 Online:2009-01-10 Published:2009-01-10

摘要: 采用饱和浸提液与土水比1∶5浸提液两种方法分析了松嫩平原94份盐碱土样品的电导率、钠吸附比、主要阳离子(Na+、K+、Ca2+、Mg2+)以及总阳离子浓度等化学参数,并对两种方法测定的盐碱化参数相关性进行了研究。结果表明:饱和浸提液电导率、钠吸附比、总阳离子浓度、Na+离子浓度与土水比1∶5浸提液相应参数存在极显著的相关关系,其关系方程可用于松嫩平原盐碱土饱和浸提液与1∶5浸提液间化学参数的换算;而K+、Ca2+、Mg2+离子浓度在两种浸提液间不存在相关性。

关键词: 小城镇, 土地利用变化, 生态效应, 生物多样性

Abstract: Ninety-four saline and alkaline soil samples were collected from the Songnen Plain of Northeast China, and their electrical conductivity (EC), sodium adsorption ratio (SAR), total cation concentration (TCC), and major cations (Na+, Ca2+, Mg2+, K+) concentrations in saturated and in 1∶5 soil/water extracts were determined. The EC, SAR, TCC, and Na+ concentration in saturated and in 1∶5 soil/water extracts had significant correlations, and the established regression equations could be used to convert these parameters in the two extracts. However, no correlations were observed between the K+, Ca2+ and Mg2+ concentrations in saturated and in 1∶5 soil/water extracts.

Key words: Small town, Land-use change, Ecological effect, Biodiversity