| 亚热带红壤丘陵典型区土壤全氮的空间变异特征 |
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| 引用本文： | 路鹏,黄道友,宋变兰,黄敏,刘守龙,苏以荣,肖和艾,吴金水.亚热带红壤丘陵典型区土壤全氮的空间变异特征[J].农业工程学报,2005,21(8):181-183. |
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| 作者姓名： | 路鹏 黄道友 宋变兰 黄敏 刘守龙 苏以荣 肖和艾 吴金水 |
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| 作者单位： | 1. 中国科学院水利部水土保持研究所,杨凌,712100;中国科学院亚热带农业生态研究所,长沙,410125
2. 中国科学院亚热带农业生态研究所,长沙,410125 |
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| 基金项目： | 中国科学院知识创新工程重要方向项目(KZCX3-SW-426)；国家自然科学基金重点项目(40235057)；国家重点基础研究发展规划(973)项目(2002CB412503) |
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| 摘 要： | 在GIS支持下，运用地统计学方法分析了耕层土壤全氮的空间变异特征，并在此基础上利用Kriging插值方法绘制了土壤全氮的空间分布图。结果表明，在步长间隔60 m下，土壤全氮具有较强的空间相关性，其相关距离为208 m。在NE30°、NE120°两个方向上具有典型的几何异向性结构特点；在NE60°、NE150°两个方向上具有典型的带状异向性结构特点。Kriging插值结果表明，研究区土壤全氮的空间分布表现为条带状和斑块状分布。土壤全氮高值斑块区的分布与地势相对低洼的地形部位相吻合。地形是影响土壤全氮空间变化的主要因素。
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| 关 键 词： | 土壤全氮 空间变异性 Kriging插值法 GIS 亚热带典型区 |
| 文章编号： | 1002-6819(2005)08-0181-03 |
| 收稿时间： | 1/6/2005 12:00:00 AM |
| 修稿时间： | 6/6/2005 12:00:00 AM |
Characteristics of spatial variability of total soil nitrogen in the typical subtropical red soil hilly areas |
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| Lu Peng,Huang Daoyou,Song Bianlan,Huang Min,Liu Shoulong,Su Yirong,Xiao Heai,Wu Jinshui.Characteristics of spatial variability of total soil nitrogen in the typical subtropical red soil hilly areas[J].Transactions of the Chinese Society of Agricultural Engineering,2005,21(8):181-183. |
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| Authors: | Lu Peng Huang Daoyou Song Bianlan Huang Min Liu Shoulong Su Yirong Xiao Heai Wu Jinshui |
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| Abstract: | A geostatistics method combined with GIS was applied to analyze and map the spatial variability of total soil N in topsoil. The results showed that total soil N had strong spatial relativity at 60 m lag interval and its range of autocorrelation extended to 208 m. The variogram of total soil N was characterized by geometric anisotropy in NE30° and NE120° directions and zonal anisotropy in NE60° and NE150° directions. The spatial distribution map of total soil N interpolated by Kriging interpolation showed apparently strip and block. The "hot spots" of high soil N content were consistent with the low locations of the field. The spatial distribution of total soil N was controlled by topology. |
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| Keywords: | total soil nitrogen spatial variability Kriging interpolation GIS typical subtropical areas |
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