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北京市挂甲峪地区土壤全硒含量分布特征
崔 萌,孙向阳,姜新福,李素艳,杨少斌,李 松,龚小强,张 乐
1.北京林业大学林学院;2.北京市通州区林业种子苗木服务中心;3.北京林业大学
摘要:
为调查北京市挂甲峪地区土壤全硒含量分布特征,探讨不同土地利用方式和海拔高度对土壤全硒含量的影响,采集挂甲峪地区表层土壤(0 ~ 20 cm)样品122个,采用GIS方法对土壤全硒含量进行了空间分布特征研究。结果表明:挂甲峪地区土壤全硒含量变幅为0. 06 ~ 0.76 mg/kg,平均值为0. 30 mg/kg。86.88% 的土壤全硒含量处于足硒及以上水平(> 0.175 mg/kg),其中有20.49 % 的土壤属于富硒含量(0.40 ~ 0.30 mg/kg)。不同土地利用类型间以草地土壤全硒含量平均值最高(0.40 mg/kg),其次是林地(0.37 mg/kg),最低为园地(0.25 mg/kg)。表层土壤全硒含量随海拔高度的增加呈上升趋势。土壤硒元素的块金值为0.001 4,块金系数为88.10%,空间相关性弱。挂甲峪地区整体上呈北西向带状分布,存在富硒土壤。
关键词:  挂甲峪  空间相关性  
DOI:10.13758/j.cnki.tr.2019.04.026
分类号:S159.2;X53
基金项目:中国工程院咨询研究项目(2014-XZ-11-02)和北京市科技计划项目( Z161100001116061 )资助。
Distribution Pattern of Soil Total Selenium in Guajiayu Area of Beijing
CUI Meng1, SUN Xiangyang1, JIANG Xinfu2, LI Suyan1, YANG Shaobin1, Li Song3, gongxiaoqiang4, ZHANG Le1
1.College of Forestry,Beijing Forestry University;2.Forest Seed and Seedling Service Center of Tongzhou District in Beijing;3.Beijing Forestry University;4.Beijing forestry University
Abstract:
To illustrate the distribution characteristics of soil total selenium (Se), 122 samples of topsoils (0–20 cm) were collected from Guajiayu area in Beijing to analyze the spatial distribution characteristics of soil total Se content with GIS and its relationship with altitude and land use type. The results showed that total Se content ranged from 0.06 to 0.76 mg/kg with the average value of 0.30 mg/kg. 86.88% of soil samples belonged to Se-sufficient and above levels (>0.175 mg/kg), among of which 20.49% of soil samples belonged to Se-enriched level (0.40 – 0.30 mg/kg). Grassland had the highest total Se content (0.40 mg/kg), followed by woodland (0.37 mg/kg), and the lowest was orchard (0.25 mg/kg). Soil total Se content had a significant positive correlation with altitude. Furthermore, spatial variability indicated that spatial correlation of Se element was weak, with the nugget (C0) and the coefficient of nugget (C0/(C0+C)) were 0.001 4 and 88.10%, respectively. The distribution of soil total Se generally showed a northwest zonal distribution trend, and Se-rich soils are obviously existed in the area.
Key words:  Guajiayu  Spatial correlation  Selenium(Se)

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