天津滨海开发区绿地土壤盐分时空变异特征

该文依据天津滨海经济技术开发区多年土壤盐分数据，采用传统统计学和地统计学的方法，对区域内表层土壤（0~20 cm）及底层土壤（60~80 cm）含盐量和pH值的时空变异特征进行分析。结果表明，在2006、2008、2011年，表层土壤都属于非盐化土，底层土壤盐化程度从中度转变为轻度，平均值从2.82 g/kg降低到1.65 g/kg；pH值随深度略有增大，但表层和底层的值均逐年降低。区域内表层土壤含盐量在这3a中都表现出空间分布独立性，底层土壤具有强空间相关性，受结构因素影响很大，而pH值在所有层次中都表现强空间相关性。区域内绿地土壤质量基本稳定在当地绿化用客土标准值范围内，即土壤全盐含量≤3...

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Bibliographic Details
Published in农业工程学报 Vol. 32; no. z2
Main Author 朱金籴 郭世文 杨永利 李品芳 张清 戴青 张凯
Format Journal Article
LanguageChinese
Published 2016
Subjects
土壤;盐分;pH;天津滨海地区;绿地;时空变异
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Summary:该文依据天津滨海经济技术开发区多年土壤盐分数据，采用传统统计学和地统计学的方法，对区域内表层土壤（0~20 cm）及底层土壤（60~80 cm）含盐量和pH值的时空变异特征进行分析。结果表明，在2006、2008、2011年，表层土壤都属于非盐化土，底层土壤盐化程度从中度转变为轻度，平均值从2.82 g/kg降低到1.65 g/kg；pH值随深度略有增大，但表层和底层的值均逐年降低。区域内表层土壤含盐量在这3a中都表现出空间分布独立性，底层土壤具有强空间相关性，受结构因素影响很大，而pH值在所有层次中都表现强空间相关性。区域内绿地土壤质量基本稳定在当地绿化用客土标准值范围内，即土壤全盐含量≤3 g/kg、pH值≤8.5。该研究对于评价当地土壤改良效果，提高绿地管理水平，积累滨海盐渍地改良经验，实现当地土地资源的可持续发展具有现实意义。
Bibliography:Both salinization and alkalinization of soil threaten the livability and urban green space in the coastal regions of the Tianjin Economic-Technological Development Area (TEDA). Salt content and pH value are two important parameters to indicate soil salinity. The objective of this study was to quantify the spatial distribution patterns of salt content and pH value and provide a theoretical basis for improving local soil, management and protection of green spaces, and soil quality evaluation as well. Focusing on the spatial complexity and regular pattern of soil salinization in TEDA, the soils at both 0-20 cm (top-soil) and 60-80 cm (sub-soil) depths were collected in 2006, 2008 and 2011 from 73 sampling sites distributed in the green spaces of the TEDA, in which the soil was nearly completely replaced with fresh soil at around twenty years ago. Salt content and pH value were measured using an electrical conductivity meter and a pH meter, respectively, and thereafter analyzed with both geostatistical and tradit
ISSN:1002-6819