| 中子仪的标定及其在坡地土壤水分测量中的应用 |
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| 引用本文： | 陈洪松,邵明安.中子仪的标定及其在坡地土壤水分测量中的应用[J].干旱地区农业研究,2003,21(2):68-71,76. |
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| 作者姓名： | 陈洪松 邵明安 |
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| 作者单位： | 1. 中国科学院,水利部,水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100;中国科学院亚热带区域农业研究所,湖南,长沙,410125
2. 中国科学院,水利部,水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西,杨凌,712100 |
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| 基金项目： | 国家杰出青年科学基金(40025106)，国家自然科学基金重大研究计划(90102012) |
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| 摘 要： | 介绍了野外标定中子仪的方法，并比较分析了中子仪测定结果与土钻烘干法所得结果的差异。结果表明：采用分层标定的方法能够取得很好的效果，坡地土壤可以分10cm、20-30cm、40cm三个层次进行标定；由于坡地土壤物理性质的空间变异性和微地貌的差异性，中子仪法测定结果与土钻烘干法测定结果具有一定的差异；在研究降雨入渗及土壤水分再分布规律时，最好选择其它表层测量精度较高的水分测定装置。
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| 关 键 词： | 中子仪 标定方法 分层标定 坡地土壤 土壤水分 测量 应用 |
| 文章编号： | 1000-7601(2003)02-0068-04 |
Field calibration of neutron probe and its application in measuring soil water content on sloping land |
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| CHEN Hong-song,SHAO Ming-an.Field calibration of neutron probe and its application in measuring soil water content on sloping land[J].Agricultural Research in the Arid Areas,2003,21(2):68-71,76. |
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| Authors: | CHEN Hong-song SHAO Ming-an |
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| Abstract: | Neutron probe is appropriate equipment for measuring soil water content continually and dynamically. The method for field calibration of neutron probe was introduced and the results measured by neutron probe and oven drying methods were compared in this paper. The results showed that neutron probe could be well calibrated at different soil layers, such as at 10, 20-30, and larger than 40 cm layers, respectively. Soil water content measured with neutron probe was a little different with that measured with oven drying method, which was caused by the variability of soil physical properties and difference of micro-topography on sloping land. Other apparatus with higher precision was needed when soil water content at upper soil layers was measured during rainfall infiltration and soil water redistribution. |
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| Keywords: | neutron probe calibration soil water sloping land |
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