太原市农业土壤全氮和有机质的空间分布特征及其影响因素
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家科技部科技支撑资助项目(2006BAD10A06-03);太原市重大科技攻关资助项目(050003);中澳国际合作资助项目(LWR/2003/039)


Spatial characteristics and impact factors of soil total nitrogen and soil organic matter in Taiyuan
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    利用GPS定位,2005年在山西省太原市主要农业用地采集土样1821个,分析了全氮和有机质的含量。应用传统统计学和地质统计学方法对数据进行了分析。结果表明,按照1980年全国第二次土壤普查养分分级标准,土壤全氮和有机质的平均含量均属中等水平。通过半方差函数分析,土壤全氮和有机质在一定范围内存在空间相关性;它们的空间相关距离分别为122.4 km和75.6 km;全氮的空间变异主要受结构性因素的影响,而土壤有机质的空间变异是由结构性因素和随机性因素共同作用引起的。太原市土壤全氮含量的空间分布呈现由西南向东北逐渐降低的趋势,而有机质的分布规律较为复杂,它们的空间分布主要受土壤类型、海拔高度、土地利用方式和人类生产活动等因素的影响。土壤全氮与有机质的空间分布存在很大的差异,这与娄烦县、古交市当地土壤受煤粉尘污染严重以及所处地形地貌密切相关。研究揭示了在自然和社会条件十分复杂的情况下太原市土壤全氮和有机质的空间变异规律及其影响因素,为实现土壤肥力评价和养分资源精准管理提供了科学依据。

    Abstract:

    1821 soil samples (GPS used for recording sample location) were collected in agricultural lands in Taiyuan in 2005. Total soil organic matter and nitrogen contents were measured. The spatial pattern of the data were analyzed using both traditional descriptive statistics and geo-statistics. The results indicated that soil organic matter and total nitrogen contents are at moderate level of soil fertility according to the soil fertility classification standards of the second national soil survey in 1980s. The semivariograms of geostatistics analysis indicated the spatial autocorrelations for soil organic matter and soil total nitrogen, with spatial dependence of 122.4 km and 75.6 km, respectively. The spatial variability of soil total nitrogen content is mainly controlled by its auto-spatial dependence, whilst spatial autocorrelation and random both contribute to the spatial structure of soil organic matter. The distribution of soil total nitrogen and organic matter was controlled by soil types, elevation, land use and human factors such as the impact of production activities. The spatial distributions of soil organic matter and soil total nitrogen content interpolated by ordinary kriging also demonstrate that in Taiyuan soil organic matter and soil total nitrogen have significantly different spatial structure due to the soil contamination by coal mining dusts in Loufan County and Gujiao County and other topographical and geomorphologic factors. The study showed the spatial pattern soil organic matter and total N in Taiyuan due to complex natural and social variables and provides a scientific basis for the evaluation and sustainable management of soil fertility and nutrient resources.

    参考文献
    相似文献
    引证文献
引用本文

张建杰,李富忠,胡克林,张强*,郭彩霞,黄元仿.太原市农业土壤全氮和有机质的空间分布特征及其影响因素.生态学报,2009,29(6):3163~3172

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数: