| 建始县土壤硒的地统计学分析 |
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| 引用本文： | 马友平,冯仲科,常胜. 建始县土壤硒的地统计学分析[J]. 北京林业大学学报, 2005, 0(Z2) |
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| 作者姓名： | 马友平 冯仲科 常胜 |
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| 作者单位： | 北京林业大学测绘与3S技术中心，北京林业大学测绘与3S技术中心，湖北民族学院生物科学与技术学院 湖北民族学院生物科学与技术学院 |
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| 基金项目： | “863”国家高新技术项目(2003AA245030)，国家自然科学基金项目(90302014)，北京市自然科学基金项目(4041002) |
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| 摘 要： | 通过在富硒地区的高硒地带设定面积约1.6 hm2的标准地,将网格的交叉处作为取样点采集土样,土样分为两层,即0~20 cm和40~60 cm.共采集土样288个,分别测其全硒及有效硒的含量,并应用地统计学的方法进行分析.结果表明,40~60 cm土层中有效硒的空间异质性最大,分数维较低;不同土层的硒具有明显各向异性的特征,变异函数4个特征参数接近,均为球状模型;变程随土层厚度变化,人为的经营措施对其空间结构产生较大的影响.
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| 关 键 词： | 有效硒 全硒 地统计学 |
Analysis of soil selenium by geo-statistics in Jianshi County,Hubei Province. |
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| MA You-ping. Analysis of soil selenium by geo-statistics in Jianshi County,Hubei Province.[J]. Journal of Beijing Forestry University, 2005, 0(Z2) |
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| Authors: | MA You-ping |
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| Affiliation: | MA You-ping~ |
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| Abstract: | This paper studied the quantity and distribution of soil selenium by means of geo-statistics in Jianshi County,central China's Hubei Province.A standard plot was set up and 288 soil samples were collected at the crossing points of the grid at two depth ranges of 0——20 and 40-60 cm.The total and effective selenium in the soils were measured.Results indicated that the soil of 40——60 cm deep had a maximum spatial heterogeneity but a low fractal dimension of effective selenium;the selenium at the two layers had a marked variation in different directions,having similar characteristic parameters of variation functions;human activities have significant impacts on the spatial structure of selenium. |
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| Keywords: | effective selenium total selenium geo-statistics |
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