| 东莞林地土壤肥力空间异质性分析 |
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| 引用本文： | 沈德才,陈跃洲,周永东,龙田养,朱剑云,叶永昌.东莞林地土壤肥力空间异质性分析[J].广东林业科技,2014,30(5):1-6. |
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| 作者姓名： | 沈德才 陈跃洲 周永东 龙田养 朱剑云 叶永昌 |
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| 作者单位： | 广东省东莞市林业科学研究所,广东 东莞,523106 |
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| 基金项目： | 广东省东莞市科学技术局项目“东莞森林生态系统碳储量及其碳汇技术研究”（2007108101112） |
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| 摘 要： | 应用地统计学结合地理信息系统研究了广东省东莞市森林表层土壤（0～25 cm）有机质、全氮、全钾、全磷和pH值等5种土壤肥力指标的空间变异规律。研究表明：全磷、全钾、有机质、全氮为中等变异；pH值属于弱变异；全钾、pH值的变异函数曲线的理论模型符合球状模型，有机质、全氮、全磷适用模型为指数模型；全磷、全钾、有机质、pH值具有中等空间相关性，全氮的空间相关性较弱；5种肥力指标的空间自相关范围存在明显差异，变化范围为2218～19297 m。用普通克立格法进行最优内插，得各肥力指标含量分布图，并分析了各土壤肥力指标的分布状态。
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| 关 键 词： | 地统计学 地理信息系统 土壤肥力 空间变异 |
| 收稿时间： | 2014/7/16 0:00:00 |
| 修稿时间： | 2014/9/15 0:00:00 |
Spatial Variability of Forest Soil Fertility in Dongguan |
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| shendecai,and.Spatial Variability of Forest Soil Fertility in Dongguan[J].Forestry Science and Technology of Guangdong Province,2014,30(5):1-6. |
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| Authors: | shendecai and |
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| Institution: | (Dongguan Research Institute of Forestry, Dongguan, Guangdong 523106, China) |
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| Abstract: | Geostatistics combined with geographic information systems （GIS）was applied to analyze spatial variability of forest soil fertility in top layer （0-25 cm）soil in Dongguan,Guangdong.Soil fertility index in this study included soil organic matter （SOM）,total N,total K,total P and pH value.The results showed that：the total P,total K,SOM,total N is in medium variation and pH is in weak variation;the semivariograms of SOM,to-tal N,total P were best described by exponential model,while total K and pH value were best described spherical model.Soil fertility had moderate spatial correlation except total N,which had weak spatial correlation;their spa-tial heterogeneity degree was obvious different in the range of 2 21 8 to 1 9 297 m.The distributing map of soil fertili-ty were drawn by using ordinary Kriging,and the distributing results of soil fertility were analyzed.The results can be applied in forest ecological construction of Dongguan. |
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| Keywords: | geostatistics GIS soil nutrients spatial variability |
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