| 摘要: |
| 用美国Wescor公司生产的PCT-55热电偶土壤湿度传感器和HR-33T微伏计对黄土区2种典型土壤的水势进行了测定试验研究，并与压力膜法测定的土壤持水曲线进行了比较。结果表明，热电偶土壤湿度计有测定土壤水势范围广、使用方便、准确度高且能用于田间定位监测土壤水势动态之优点。 |
| 关键词: 土壤水势 热电偶湿度计 微伏计 压力膜法 |
| DOI： |
| 分类号:S5035.3 |
| 基金项目:陕西省科委攻关项目(2000 K07-G1-01)和杨凌农业生物技术中心资助项目(99-8) |
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| Measurement of soil water potential with thermocouple psychrometers |
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WANG Fu xin,CHEN Yao feng,WANG Hui ping,REN Hui li,HAN De jun,LI Chun lian,WANG Fu xin,CHEN Yao feng,WANG Hui ping,REN Hui li,HAN De jun,LI Chun lian,WANG Fu xin,CHEN Yao feng,WANG Hui ping,REN Hui li,HAN De jun,LI Chun lian
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| Abstract: |
| Water potential of two typical soils in loess is measured and studied with PCT-55 thermocouple psychrometer and HR-33T millvoltmeter manufactured by Wescor Corporation in USA,and the measurement results of soil water characteristic curve is compared with the method of soil moisture pressure membrane.The results show that thermocouple psychrometer has the advantage of large measurement range,simple handling and high resolution,so it is suitable for dynamic measurement of soil water potential in field. |
| Key words: soil water potential thermocouple psychrometers millvoltmeter method of soil moisture pressure membrane |
