| 孔达,王立权,刘继龙,付强.黑土区农田土壤含水量空间变异性的尺度效应研究[J].水利学报,2017,48(5):608-612,622 |
| 黑土区农田土壤含水量空间变异性的尺度效应研究 |
| Scale effect of spatial variability of cropland soil water content in black soil region |
| 投稿时间：2016-12-29 |
| DOI：10.13243/j.cnki.slxb.20161366 |
| 中文关键词: 黑土区 土壤含水量 空间变异性 尺度效应 |
| 英文关键词: black soil region soil water content spatial variability scale effect |
| 基金项目:国家自然科学基金项目（51409046，51279031） |
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| 摘要点击次数: 1552 |
| 全文下载次数: 1101 |
| 中文摘要: |
| 为研究黑土区农田土壤含水量空间变异性的尺度效应，测定32 m×32 m、48 m×48 m、64 m×64 m、80 m×80 m和96 m×96 m 5种采样面积上的土壤含水量，运用传统统计学、地统计学和多重分形等理论，分析土壤含水量空间变异性随采样面积的变化规律。结果表明：研究区不同采样面积土壤含水量的平均值介于31.13%~33.57%，均存在由小于采样尺度和实验误差导致的变异，空间相关范围介于25.80 m~123.60 m，空间相关程度介于16.742%~29.874%，空间变异程度介于0.0292~0.1026；随采样面积的增加，土壤含水量的平均含量和变异程度都逐渐减小，由小于采样尺度和实验误差导致的变异与空间相关范围都先降低后增加，空间相关程度先增加后降低，造成不同采样面积土壤含水量空间变异性的局部信息有所差异。 |
| 英文摘要: |
| In order to reveal the scale effect of spatial variability of soil water content in black soil region, the change rules of spatial variability of soil water content with the sampling area were analyzed by the methods of traditional statistics, geostatistics and multifractality on the basis of soil water content measured with TDR in 32 m×32 m,48 m×48 m,64 m×64 m,80 m×80 m and 96 m×96 m sampling areas. The results show that the mean values of soil water content from different sampling areas range in 31.13%-33.57%,ex-isting variations caused by scales less than the sampling one and experimental errors, with spatial correla-tion scope between 25.80-123.60 m, and spatial correlation degrees within 16.742%-29.874% and spatial variability degrees ranged 0.0292-0.1026 in different sampling areas. With the increase of sampling areas, the mean content and spatial variation degree of soil water content decrease, and the variations and spatial correlation range decreased firstly and then increased,its spatial correlation degree increased firstly and then decreased,and local information that caused its spatial variability in different sampling areas are different. |
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