大尺度采样下不同模型方法预测土壤全氮空间分布研究——以海南岛为例
作者:
作者单位:

作者简介:

通讯作者:

基金项目:

科技基础性工作专项“我国1∶5万土壤图籍编撰及高精度数字土壤构建(二期工程)”(2012FY112100)


Spatial prediction of soil total nitrogen by different methods in large scale — A case study of Hainan island
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
    摘要:

    在大区域尺度、有限土壤样点情况下,为探索准确预测土壤属性的方法,以海南岛为研究区,采用近似网格采样方法,采集130个样点,用多元线性回归(MLR)、普通克里格(OK)和回归克里格(RK)3种模型方法进行土壤全氮预测,并以29个验证点比较了预测精度。结果显示:1)对较大区域进行土壤全氮的空间分布的预测精度为OK>RK>MLR;2)3种模型对土壤全氮含量空间预测分布趋势基本一致,总趋势为岛内自东向西方向逐渐降低;3)0~5 cm土壤全氮含量与土地利用方式呈极显著相关关系,0~20 cm土壤全氮含量与归一化植被指数呈显著相关,20~40、40~60 cm土壤全氮含量与归一化植被指数、坡度呈极显著或显著相关。

    Abstract:

    There has been a great concern about how to accurately predict soil properties using the limited soil samples.In order to explore the prediction method with higher precision in large scale using the limited soil samples,130 soil sampling sites were collected in Hainan island,three methods,iemultiple linear regression(MLR),ordinary kriging(OK)and regression kriging(RK),were used to predict spatial distribution of soil total nitrogen(TN),and 29 sampling sites were validated to compare the prediction accuracy of these three methods.The results showed that:1)the root mean square error of each soil layer with the three methods was OK> RK> MLR;2)the prediction distribution tendency of soil TN by the three methods was similar,iethe soil TN content was decreased gradually from east to west in Hainan island;3)soil TN content of 0~5 cm layer was very significantly correlated with farmland use types,that of 0~20 cm layer was significantly correlated with normalization difference vegetation index,and those of 20~40 cm and 40~60 cm soil layers were very significantly or significantly correlated with normalization difference vegetation index and slope.

    参考文献
    相似文献
    引证文献
引用本文

邵娜,张认连,张维理,曾建华,符传良,谢良商,徐爱国*.大尺度采样下不同模型方法预测土壤全氮空间分布研究——以海南岛为例[J].中国土壤与肥料,2015,(6):9-17.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
历史
  • 收稿日期:2015-02-12
  • 最后修改日期:2015-03-07
  • 录用日期:
  • 在线发布日期: 2015-12-17
《中国土壤与肥料》招聘启事
关闭