水土保持通报2016，Vol.36Issue(5)：146-150,155,6.DOI:10.13961/j.cnki.stbctb.2016.05.002
基于GIS和地统计学的甘肃省白龙江流域土壤氮素空间变异分析
Spatial Variability of Soil Nitrogen in Bailongjiang Watershed in Gansu Province Based on Geostatistics and GIS
摘要
Abstract
Objective] The objective of this study is to analyze the spatial variability of soil nitrogen (total ni‐trogen ,nitrate nitrogen and ammonium nitrogen) in Bailongjiang watershed in Gansu Province ,and provide scientific basis for the management of soil nitrogen and the regulation of integrated ecosystem .[Methods] Soil samples were collected at a depth of 0—20 cm ,and were tested in laboratory .Geostatistical methods combined with ArcGIS 10 .2 were applied to analyze the spatial variability and distribution pattern of soil ni‐trogen .[Results] The variation coefficient of total nitrogen ,nitrate nitrogen and ammonium nitrogen were moderate ,with the value ranged from 35% to 90% .The rations of nugget to sill of total nitrogen ,nitrate ni‐trogen and ammonium nitrogen were ranged from 50 .13% to 63 .19% ,the spatial variability was affected by structural and random factors ,and the best fitting theoretical semivariogram models of soil nitrogen were Gaussian models .As a whole ,the spatial distribution of total nitrogen and nitrate nitrogen were higher in northwest but lower in southeast ,and the soil ammonium nitrogen in the northwest area was lower than that in southeast .[Conclusion] The content of total nitrogen and nitrate nitrogen varied remarkably in different land use types and altitudes ,while there was no significant correlation between ammonium nitrogen and different land use types and altitudes .关键词
GIS/地统计学/土壤氮素/空间变异/甘肃省白龙江流域Key words
GIS/geostatistics/soil nitrogen/spatial variability/Bailongjiang watershed in Gansu Province分类
农业科技引用本文复制引用
齐姗姗,巩杰,张影,钱彩云..基于GIS和地统计学的甘肃省白龙江流域土壤氮素空间变异分析[J].水土保持通报,2016,36(5):146-150,155,6.基金项目
国家自然科学基金项目“甘肃白龙江流域景观格局与生态系统服务功能时空变化研究”（41271199）；甘肃省民生科技计划项目 （）
