| 土壤水盐空间变异尺度效应的研究 |
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| 引用本文： | 徐英,陈亚新,史海滨,魏占民. 土壤水盐空间变异尺度效应的研究[J]. 农业工程学报, 2004, 20(2): 1-5 |
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| 作者姓名： | 徐英 陈亚新 史海滨 魏占民 |
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| 作者单位： | 1. 扬州大学水利科学与工程技术学院,扬州,225009
2. 内蒙古农业大学水资源与水土工程研究所,呼和浩特,010018 |
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| 基金项目： | 国家自然科学基金(51079013) |
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| 摘 要： | 水文学和土壤学中的尺度问题是目前水土科学研究的前沿课题之一。该文利用空间信息科学——地质统计学、根据设计的各种田间网格，在一维和二维(平面)空间中初步研究了黄河河套平原长胜试验区中小尺度的土壤水分和盐分随采样尺度所表现出的空间变异(结构性)的某些规律，表明采样尺度的划分和选取与水分和盐分的空间变异性大小有密切关系，尺度效应的研究对于指导农业技术研究中野外采样系统设计、节省外业调查的工作量及科学地进行内业计算、评估和揭示农业工程中具有地学特征的区域性自然规律有重要作用。
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| 关 键 词： | 尺度效应； 土壤特性； 空间变异性； 地质统计学； 变异函数 |
| 文章编号： | 1002-6819(2004)02-0001-05 |
| 收稿时间： | 2003-04-10 |
| 修稿时间： | 2004-01-08 |
Scale effect of spatial variability of soil water-salt |
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| Xu Ying,Chen Yaxin,Shi Haibin and Wei Zhanmin. Scale effect of spatial variability of soil water-salt[J]. Transactions of the Chinese Society of Agricultural Engineering, 2004, 20(2): 1-5 |
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| Authors: | Xu Ying Chen Yaxin Shi Haibin Wei Zhanmin |
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| Abstract: | Scale problems in hydrology and soil science have become one of focuses in the field of water and soil science at present. Using spatial information science - geostatistics, the article preliminarily studied some laws of spatial variability of one-and two-dimensional soil water and salt on moderate-or small-measuring-scale grid at Chang Sheng experimental demonstraion in He Tao Plain of Yellow River. The results showed selection and classification of measuring scale were related closely to spatial variability of soil water and salt. Studies on scale effect could guide design of field sampling systems and reduce field workload and was significant in calculating and evaluating results of prediction or simulation in agricultural research, and disclosing regionalized natural laws in the field of agricultural engineering. |
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| Keywords: | scale effect soil properties spatial variability geostatistics semivariogram |
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