| 负压式土壤张力计测定法改进及应用 |
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| 引用本文： | 刘思春,王国栋,朱建楚,马爱生,许安民.负压式土壤张力计测定法改进及应用[J].西北农业学报,2002,11(2):29-33. |
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| 作者姓名： | 刘思春 王国栋 朱建楚 马爱生 许安民 |
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| 作者单位： | 西北农林科技大学,陕西杨凌,712100 |
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| 基金项目： | 国家自然科学基金资助项目(48970035). |
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| 摘 要： | 普通负压式水银张力计最小读数1mm汞柱，即最小读数为13．6mm，水柱，改进后负压式复合张力计读数更精确，最小读数为1．0mm水柱，提高精确度13．6倍，使用其测定土壤水势更准确，田间条件测定土壤水势改以往普通负压式水银张力计一点测定为改进后负压式复合张力计两点测定，并能直接反映田间两点水势差异情况，判断田间土壤水分运动趋势，它使研究温度对土壤水势影响更方便，改装后负压式复合张力计对温度升降造成水势变化是通过U形管式黄液压力计数反映的，所以较准确反映温度对水势影响，因而测得结果更接近田间土壤水势，另外，改装后负压式复合张力计能准确测定土壤水势，通过称重计算出一定时间经过一段距离和横断面土壤水分运动而散失水量，从而求得在稳态流条件下土壤非饱和导水率，为土壤水分运动提供参数
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| 关 键 词： | 负压式复合张力计 土壤水势 测定 土壤非饱和导水率 土壤水分 |
| 文章编号： | 1004-1389(2002)02-0029-05 |
| 收稿时间： | 2001/8/10 0:00:00 |
| 修稿时间： | 2001年8月10日 |
Improvement and Application on Soil Tension Meter with Negative-pressure Mercury |
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| LIU Sichun,WANG Guodong,Zhu-Jianchu,MA Aisheng and XU Anmin.Improvement and Application on Soil Tension Meter with Negative-pressure Mercury[J].Acta Agriculturae Boreali-occidentalis Sinica,2002,11(2):29-33. |
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| Authors: | LIU Sichun WANG Guodong Zhu-Jianchu MA Aisheng and XU Anmin |
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| Institution: | Northwest Sci Tech University of Agricultural and Forestry, Yangling Shaanxi 712100, China;Northwest Sci Tech University of Agricultural and Forestry, Yangling Shaanxi 712100, China;Northwest Sci Tech University of Agricultural and Forestry, Yangling Shaanxi 712100, China;Northwest Sci Tech University of Agricultural and Forestry, Yangling Shaanxi 712100, China;Northwest Sci Tech University of Agricultural and Forestry, Yangling Shaanxi 712100, China |
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| Abstract: | The least number can be seen is 1.00 mm Hg column (13.6 mm water column) in Soil tension meter with negatoive-pressure mercury.Soil complex tension meter''s the least number is 1.00 mm water column by improving on soil tension meter with negative-pressure mercury,the sensitivity of complex tension meter increase 13.6 times than tension meter.The flow of soil water was determined in field by two sites replaced one site,the result can directly show difference between two assaying sites,and judgetrend of soil water movement.Meantime soil complex tension meter is good and exactness at temperature dependence.Soil complex tension meter can apply some parameters of soil water movement althoug h exact assaying difference between soil flow of water,for example soil dissipating amount,soil non-saturation conductivity. |
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| Keywords: | Negative-pressure complex tension meter Soil water potential Precision Temperature Water transmitting rate |
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