四川农业大学学报 ›› 2015, Vol. 33 ›› Issue (04): 408-414.doi: 10.16036/j.issn.1000-2650.2015.04.009

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崇州市典型农田土壤中铬的含量状况与空间分布

翁倩1, 李启权1, 代天飞2, 张少尧1, 袁大刚1, 陈冠桦1   

  1. 1. 四川农业大学资源学院, 四川 温江 611130;
    2. 成都土壤肥料测试中心, 成都 610041
  • 收稿日期:2015-08-01 出版日期:2015-12-31 发布日期:2017-02-28
  • 通讯作者: 李启权,研究方向:水土资源与环境系统模拟,E-mail:liqq@lreis.ac.cn。 E-mail:liqq@lreis.ac.cn
  • 作者简介:翁倩,本科生。
  • 基金资助:
    国家自然科学基金项目(41201214)

Chromium Content Status and Spatial Distribution in Typical Farmland Soils of Chongzhou

WENG Qian1, LI Qi-quan1, Dai Tian-fei2, ZHANG Shao-yao1, YUAN Da-gang1, CHEN Guan-hua1   

  1. 1. College of Resource, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China;
    2. Chengdu Soil Fertilizer Test Center, Chengdu 610041
  • Received:2015-08-01 Online:2015-12-31 Published:2017-02-28

摘要: [目的] 了解成都平原崇州市典型农田土壤中铬的含量状况与空间分布特征。[方法] 采用混合取样的方法采集68个土壤样品,对铬含量进行室内分析测试,以样点测试结果为基础,采用地统计学和方差分析等方法,研究分析土壤中的铬含量状况与空间分布特征。[结果] 研究区土壤铬含量在76.74~127.90mg/kg之间,平均为99.85mg/kg,没有样本点超过国家土壤环境质量二级标准。地质累积指数法评价表明研究区土壤有17.65%的样点受到铬的影响,总体呈现低等程度的潜在生态风险。半方差分析表明,土壤铬的块金值与基台值之比为0.30,具有中等空间相关性。铬含量的空间分布规律明显,表现出由西南向东北逐渐升高的趋势。含量差异主要受成土母质的影响。[结论] 研究区土壤铬含量符合农田含量标准,其空间差异受结构因素与随机因素共同影响,总体呈现低生态风险。

关键词: 成都平原, 农田土壤, 铬, 空间分布, 影响因素

Abstract: [Objective] The aim of the study was to explore the chromium content and spatial distribution in Chongzhou typical farmland of Chengdu plain. [Method] 68soil samples were collected and their chromium content was analyzed. On the basis of the sample test results, spatial distribution of chromium was investigated using geostatistical methods and variance analysis. [Results] The soil chromium content in the area was ranged from 76.74 mg/kg to 127.90 mg/kg, with an mean value of 99.85mg/kg. All samples were lower than that of the national soil environmental quality standards. Geoaccumulation index evaluation showed that 17.65% of soil samples were affected by chromium, suggesting that overall potential ecological risk was low. Semivariance analysis showed that the ratio of nugget to sill was 0.30, with a moderate spatial correlation. Spatial distribution of chromium was significant and soil chromium increased from southwest to northeast. The difference was mainly affected by soil parent material. [Conclusion] The soil chromium contents meet the standards of soil farmland, indicating that ecological risk is low.

Key words: Chengdu plain, farmland, chromium, spatial distribution, factors

中图分类号: 

  • X53