| 土壤水势测定方法的选择及准确性研究 |
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| 引用本文： | 刘思春,高亚军,王永一,马爱生.土壤水势测定方法的选择及准确性研究[J].干旱地区农业研究,2011,29(4):189-192. |
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| 作者姓名： | 刘思春 高亚军 王永一 马爱生 |
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| 作者单位： | 西北农林科技大学资源环境学院,陕西,杨凌,712100 |
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| 基金项目： | 国家自然科学基金项目(40471069) |
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| 摘 要： | 通过对土壤水势常用的3种测定方法探讨,发现测定土壤水势的方法存在差别,压力膜的准确度为最高,其次是离心机,张力计的准确度较低.压力膜测定土壤水分特征曲线的形状与原状土壤的特征曲线大致相符,但要完整地测出某土壤的特征曲线需要长达半年之久.离心机测定土壤水分特征曲线较压力膜测定有偏离,离心机测定过程中土壤容重的不断变化、土...
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| 关 键 词： | 张力计 压力膜 离心机 土壤水势 |
Preliminary study on selection and accuracy of different methods for measurement of soil water potential |
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| LIU Sichun,GAO Yajun,WANG Yongyi,MA Aisheng.Preliminary study on selection and accuracy of different methods for measurement of soil water potential[J].Agricultural Research in the Arid Areas,2011,29(4):189-192. |
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| Authors: | LIU Sichun GAO Yajun WANG Yongyi MA Aisheng |
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| Institution: | LIU Si-chun,GAO Ya-jun,WANG Yong-yi,MA Ai-sheng(College of Resources & Environment,Northwest A & F University,Yangling,Shaanxi 712100,China) |
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| Abstract: | The study on three commonly used measurement methods for soil water potential shows that the accurate degree of pressure film is the highest,centrifuge is the second,while tensiometer is the lowest.The soil water characteristic curve results from the measurement of pressure film is almost in conformity with that of the origin one,but it takes as long as half a year to determin completely the characteristic curve.To determin soil water characteristic curve with centrifuge may result in deviation compared wit... |
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| Keywords: | tensiometer pressure film centrifuge soil water potential |
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