| 荒漠绿洲区人工梭梭林土壤水分空间异质性的定量研究 |
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| 引用本文： | 何志斌,赵文智.荒漠绿洲区人工梭梭林土壤水分空间异质性的定量研究[J].冰川冻土,2004,26(2):207-211. |
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| 作者姓名： | 何志斌 赵文智 |
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| 作者单位： | 中国科学院, 寒区旱区环境与工程研究所, 甘肃, 兰州, 730000 |
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| 基金项目： | 国家自然科学基金
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中国科学院"西部之光"人才培养计划 |
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| 摘 要： | 利用12×12m2样地中1×1m2、0～100cm剖面的土壤水分调查数据,采用地统计学原理与方法,研究了人工梭梭林(Haloxylon ammodendron)在栽植20a后的土壤水分格局的空间异质性程度、异质性组成、尺度以及与梭梭生长的关系.结果表明:人工梭梭林土壤水分空间异质性的96%～88%是由空间自相关因素引起的,随机因素起的作用较小.除60～80cm土层土壤水分的块金值与基台值比值较高(C0/(C0+C)=0.5),其它各层都较小(0.04～0.12),变程为1.57～2.97m.在较小(<2m)和较大(>8m)的尺度上,土壤水分的空间相关性较强.沿垂直剖面土壤含水量差异显著,10～20cm土层含水量最高(2.82%),其它各层较小(1.30%～1.67%).
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| 关 键 词： | 荒漠绿洲 人工梭梭林 土壤水分 空间异质性 |
| 文章编号： | 1000-0240(2004)02-0207-05 |
| 收稿时间： | 2003-06-26 |
| 修稿时间： | 2003年6月26日 |
The Spatial Heterogeneity of Soil Moisture in Artificial Haloxylon ammodendron |
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| HE Zhi-bin,ZHAO Wen-zhi.The Spatial Heterogeneity of Soil Moisture in Artificial Haloxylon ammodendron[J].Journal of Glaciology and Geocryology,2004,26(2):207-211. |
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| Authors: | HE Zhi-bin ZHAO Wen-zhi |
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| Institution: | Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China |
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| Abstract: | In this paper geostatistical theory and methods are used to study the degree, composition, scale and pattern of the spatial heterogeneity of soil moisture in artificial Haloxylon ammodendron. The results show that autocorrelated spatial heterogeneity is a main component of the spatial heterogeneity, with the value of C0/(C0+C)varying from 0.04 to 0.12 and the changing scale varying from 1.57 m to 2.97 m. But the layer of 60～80 cm deep is an exception, where C0/(C0+C)=0.5. Soil moisture has significant difference in the different layers, the layer of 10～20 cm deep is superior(2.82)to the other layers(e.g. ranging from 1.30 to 1.67). The variance of soil moisture leads to the density of artificial woodland decrease continually. However, the forest still grows well, reaching an average height of 2.85 m and an average ground diameter of 5.15 cm. |
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| Keywords: | desert oasis artificial Haloxylon ammodendron soil moisture spatial heterogeneity |
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