资源科学 ›› 2016, Vol. 38 ›› Issue (7): 1222-1228.doi: 10.18402/resci.2016.07.03

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新疆伊犁河谷表层土壤容重的空间变异性分析

孙国军1,2,3(), 李卫红2(), 朱成刚2, 杨玉海2, 王非4   

  1. 1. 新疆大学资源与环境科学学院,乌鲁木齐 830046
    2. 中国科学院新疆生态与地理研究所,荒漠与绿洲生态国家重点实验室, 乌鲁木齐 830011
    3. 河西学院历史文化与旅游学院,张掖 734000
    4. 伊犁哈萨克自治州水利局,伊犁 835000
  • 收稿日期:2015-12-10 修回日期:2016-06-21 出版日期:2016-07-25 发布日期:2016-07-25
  • 作者简介:

    作者简介:孙国军,男,甘肃通渭人,博士生,讲师,主要从事灌区农田管理、水土保持以及生态修复等研究工作。E-mail:sgjwin@163.com

  • 基金资助:
    国家科技支撑计划项目(2014BAC15B03);中国科学院“西部之光”一般项目(YB201302);新疆维吾尔族自治区青年科技创新人才培养工程(2013721050)

Spatial variation analysis of topsoil bulk density in the Yili Valley, Xinjiang

SUN Guojun1,2,3(), LI Weihong2(), ZHU Chenggang2, YAN Yuhai2, WANG Fei4   

  1. 1. College of Resources and Environment,Xinjiang University,Urumqi 830046,China
    2. State Key Laboratory of Desert and Oasis Ecology;Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,China
    3. School of History Agriculture and Tourism,He Xi University,Zhangye 734000,China
    4. Water Conservancy Bureau of Yili Kazak Autonomous Prefecture,Yili 835000,China
  • Received:2015-12-10 Revised:2016-06-21 Online:2016-07-25 Published:2016-07-25

摘要:

容重是土壤最基本的物理性状之一,是衡量土壤退化的核心指标,研究其空间变化对防治土壤侵蚀具有重要意义。本文以伊犁河谷为研究对象,运用传统统计学、GIS空间技术和地统计学的Kriging空间插值等方法,分析了表层土壤(0~20cm)容重的空间变异特征。结果表明:表层土壤容重频率分布为正态分布,K-S单样本检验表明,其峰度为0.14,偏度为0.15,变化范围为(1.01~1.50)g/cm3,平均值为1.25g/cm3,变异系数为7.6%,属于弱变异性;表层土壤容重的块金值为0.0056,基台值为0.0083,块金效应为32.5%,为中等相关性;空间尺度上,表层土壤容重由南向北和由西向东逐渐减小;普通克里金(Ordinary Kriging)插值表明,表层土壤容重南北走向呈条带状,东西走向呈斑块状分布格局;气候、母质等自然因素是表层土壤容重变化的内在因素,土地利用加速土壤容重的变化。

关键词: 伊犁河谷, 土壤容重, 空间变异, Kriging插值

Abstract:

Bulk density is one of the basic physical properties of soil and a core indictor of soil degradation. It is important to study spatial variation for preventing soil erosion. Here,we used traditional statistics,GIS technology and spatial interpolation of Ordinary Kriging to analyze spatial variation of topsoil (0 to 20 cm) bulk density in the Yili River Valley. The results showed that the distribution of topsoil bulk density is normal and a K-S single sample test showed that kurtosis is 0.14 and skewness is 0.15. The range of topsoil bulk density was 1.01 to 1.50g/cm3,the average value was 1.25g/cm3;the variation coefficient was 7.6% and indicates weak variation. Semi variance function of topsoil soil bulk density indicated that the nugget was 0.0056;the sill was 0.0083;and the nugget effect was 32.5%,that is to say,the spatial structures of topsoil bulk density are isotropic. Trend analysis of topsoil bulk density indicated that the topsoil bulk density was gradually reduced from south to north and also from west to east. Spatial interpolation of Ordinary Kriging indicated that the distribution of the topsoil bulk density was strip shaped from south to north,and patch shaped from east to west. The internal natural factors of topsoil bulk density were climate (such as temperature and precipitation),soil parent material (such as organic matter and mineral elements),changes in land use (such as conversion of grassland to farm land and transformation into garden and wood land)and these accelerated changes in topsoil bulk density.

Key words: Yili Valley, soil bulk density, spatial variability, Kriging interpolation