| 尧都区耕层土壤微量元素有效态含量空间分布特征 |
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| 引用本文： | 杜娟,张永清,周进财,李明.尧都区耕层土壤微量元素有效态含量空间分布特征[J].中国农学通报,2014,30(3):162-167. |
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| 作者姓名： | 杜娟 张永清 周进财 李明 |
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| 作者单位： | 山西师范大学 |
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| 基金项目： | “十一五”国家科技支撑计划重点项目 |
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| 摘 要： | 为了实现尧都区＂精准农业＂发展的新需求,为当地土壤耕作及作物栽培提供科学依据,基于GIS技术,采用地统计学分析方法对山西省尧都区耕层土壤中有效态Fe、Mn、Cu、Zn含量的空间变异特征和丰缺状况进行了研究。结果表明：（1）88.8%的土样缺乏有效Fe,有效Mn和有效Zn分别有19.2%和0.8%的样品处于临界值以下。描述性统计所得变异系数在41.5%（有效Zn）~55.5%（有效Mn）之间,均属于中等变异。（2）有效Fe含量的最适模型为球状模型,有效Mn、有效Zn和有效Cu的最适模型为指数模型。有效Zn含量块金值与基台值之比C0/C0＋C为83.97%,空间相关性程度较弱;有效Fe、有效Mn和有效Cu具有中等的空间相关性。研究区4种微量元素具有各向异性,其中有效Mn在90°方向上变异程度较强。（3）Kriging插值结果显示,有效Fe和有效Cu在汾河流域都呈现出明显的带状沿河分布趋势,且由河流东岸向西岸呈递减趋势。研究区内有效Fe非常缺乏,有效Cu含量丰富,有效Mn在东南部和西北部富集,有效Zn整体由西南向东北递减。
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| 关 键 词： | 耕层土壤 有效态微量元素 空间变异 空间分布 |
| 收稿时间： | 2013/4/12 0:00:00 |
| 修稿时间： | 2013/5/14 0:00:00 |
Spatial Distribution Characteristics of Available Microelements Contents in Irrigation-silted Soil in Yaodu District |
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| Du Juan,Zhang Yongqing,Zhou Jincai,Li Ming.Spatial Distribution Characteristics of Available Microelements Contents in Irrigation-silted Soil in Yaodu District[J].Chinese Agricultural Science Bulletin,2014,30(3):162-167. |
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| Authors: | Du Juan Zhang Yongqing Zhou Jincai Li Ming |
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| Affiliation: | 1.College of Urban and Environmental Sciences, Shanxi Normal University, Linfen Shanxi 041004; 2College of Life Sciences, Shanxi Normal University, Linfen Shanxi 041004) |
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| Abstract: | In order to achieve the new demand of‘precision agriculture’development in Yaodu District, and provide the scientific basis for local soil tillage and crop-growing, geostatistics combined with GIS was applied to study the spatial variability and level status of available Fe, Mn, Cu and Zn in irrigation-silted soil in Yaodu District, Shanxi Province. The results showed that：（1） 88.8% of the samples was short of available Fe, 19.2% of the available Mn samples and 0.8% of the available Zn samples were less than the critical value. The Cvs from mathematical statistics were between 41.5%（available Zn） and 55.5%（available Mn）, all available microelement contents belonged to moderate variability.（2） The better theoretical semivariogram models of available microelements were spherical model for Fe, exponential model for Mn, Cu and Zn. The nuggets, ranges and the ratios of C0 and C0 ＋C of the contents of available Zn was 83.97%, the spatial correlation degree was weaker. Available concentrations of Fe, Mn, and Cu had moderate spatial correlation. Four microelements in study area expressed anisotropy. Available concentrations of Mn showed the strongest variability along the direction of 90°.（3） The maps of the soil trace elements with Kriging showed that the contents of available Fe and Cu had a clearly striped distribution trends in the Fenhe River Basin, and a declining trend in river east bank to the west bank. The content of available Fe was very poor, while the content of available Cu was higher, the content of available Mn was higher in the south-east and north-west, the decreasing trend of the content of available Zn was found from southwest to northeast. |
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| Keywords: | spatial distribution |
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