甘卓亭,刘文兆.HH2型土壤湿度计测定土壤含水量的标定研究[J].干旱地区农业研究,2005,(4):69~72
HH2型土壤湿度计测定土壤含水量的标定研究
Calibration on measurement of soil water content using SMS2 Soil Moisture Probe and HH2 Meter
  
DOI：10.7606/j.issn.1000-7601.2005.04.14
中文关键词:  HH2型土壤湿度计  黑垆土  黄土高原  标定  土壤水分
英文关键词:SMS2 Soil Moisture Probe and HH2 Meter  Heilu soil  Loess Plateau  calibration  soil water
基金项目:国家973前期专项(2003CCB001)； 国家自然科学基金项目(90202011)资助
作者单位
甘卓亭 中国科学院水利部水土保持研究所，陕西 杨凌 712100；中国科学院研究生院，北京 100039 
刘文兆 中国科学院水利部水土保持研究所，陕西 杨凌 712100；西北农林科技大学，陕西 杨凌 712100 
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中文摘要:
      就HH2型土壤湿度计在黄土高原沟壑区黑垆土表层的应用进行了标定研究,分析了HH2测量的准确性,各容重标定曲线的精度和灵敏度。结果表明:在各种容重条件下用HH2测量土壤水分,输出电压的变异系数小于6%,仪器的准确性较高。线性标定方程斜率a随容重的增大而增加,常数b则相反。容重标定曲线对HH2的可调参数a0、a1影响较小。当土壤水分含量为18%～19%时,不同容重的标定曲线的差别最低。
英文摘要:
      The calibration of SMS2 Soil Moisture Probe and HH2 Meter (HH2) was studied in surface stratum of Heilu soil in the tableland and gully region of Loess Plateau, and the veracity of HH2 and the precisions and sensitivities of different calibration curves were analyzed. The results demonstrate that the CV of voltage by HH2 under different soil densities is less than 6%, and the measurements by HH2 are credible. The slope a of linear regression is increased with the accretion of soil densities, but the constant b is reverse. The calibration curves cannot be discriminated by a0 and a1. The difference of calibration curves is minimum when soil water content is 18%19%.
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