欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2003, Vol. ›› Issue (10): 1673-1676.

• 研究报告 • 上一篇    下一篇

沈阳市苏家屯区耕层土壤养分空间变异性研究

姜勇1, 张玉革2, 梁文举1, 闻大中1, 陈文波1   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
    2. 沈阳农业大学土地与环境学院, 沈阳 110161
  • 收稿日期:2002-07-22 修回日期:2002-12-05
  • 通讯作者: 梁文举
  • 基金资助:
    国家“863”计划重大项目(2001AA246021);中国科学院沈阳生态实验站开放站基金资助项目(K09SDSYZ0204)

Spatial variability of soil nutrients in cultivated surface soil of Sujiatun District, Shenyang City

JIANG Yong1, ZHANG Yuge2, LIANG Wenju1, WEN Dazhong1, CHEN Wenbo 1   

  1. 1. Institute of Applied Ecology, Chinese A-cademy of Sciences, Shenyang 110016, China;
    2. Collage of Land and Environment, Shengyang Agricultural University, Shenyang 110161, China
  • Received:2002-07-22 Revised:2002-12-05

摘要: 利用地统计学和地理信息系统相结合的方法,研究了沈阳市苏家屯区耕地土壤(0~20cm)有机质、速效氮、速效磷、速效钾含量的空间变异性特征.结果表明,各变量符合正态分布或经对数转换后符合正态分布,最佳的变异函数理论模型均为球状模型.有机质具有较强的空间相关性(C0与C0+C比值为24.11%),速效氮、速效磷、速效钾具有中度的空间相关性(C0与C0+C比值分别为29.53%、60.77%、58.82%).各变量的空间自相关距离分别为26.051、28.293、15.132和23.813km.有机质和速效氮的空间变异主要受结构性因子(如成土因子)的影响,速效磷和速效钾主要受随机性因子(如施肥)的影响.Kriging插值绘制出的养分含量空问分布图显示了养分的空间分布格局,它将有助于进一步监测养分动态,为农业和环境管理提供数字地图支持.

关键词: 地统计学, 地理信息系统, 有机质, 速效氮, 速效磷, 速效钾

Abstract: The spatial variability of organic matter (OM), available nitrogen (AN), available phosphorus (AP), and available potassium (AK) in0~20 cm horizon in cultivated soils of Sujiatun District, Shenyang City were investigated using geostatistics and geographic information system (GIS).Data of each variable fitted normal distribution or normal distribution after log transformation, and a spherical model for semivariogram fitted all the variables.Semivariograms indicated that OM content strongly spatially dependent with the ratio of nugget to sill of 24.11 % .The contents of AN, AP and AK were moderately spatially dependent with the ratio of nugget to sill of 29.53%, 60.77% and 58.82%, respectively.The ranges of spatially dependent for OM, AN, AP and AK were 26.051, 28.293, 15.132 and 23.813 km, respectively.The spatial variability for OM and AN was fundamentally affected by structural factors such as soil formation factors, and that for AP and AK was by random factors such as fertilization.Kriging maps showed the spatial distributions of the four variables, which were useful in monitoring nutrient changes and providing quantitative support to decision and policy making for agriculture and environment management.

Key words: Geostatistics, CIS, Organic matter, Available nitrogen, Available phosphorus, Available potassium

中图分类号: