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。
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 a_0 and a_1. The difference of calibration curves is minimum when soil water content is 18%~19%.
出处
《干旱地区农业研究》
CSCD
北大核心
2005年第4期69-72,共4页
Agricultural Research in the Arid Areas
基金
国家973前期专项(2003CCB001)
国家自然科学基金项目(90202011)资助
关键词
HH2型土壤湿度计
黑垆土
黄土高原
标定
土壤水分
SMS2 Soil Moisture Probe and HH2 Meter
Heilu soil
Loess Plateau
calibration
soil water
