无线电波土壤湿度计(-1型)用来快速,不接触测定田间和温室土壤水分在整个土层范围内变化的百分比含量。该装置的工作以土壤表面对电磁波反射系数的绝对值|r|与土壤湿度 W 的关系式为其基础。用487±6 MHz 频率,对大块状黑土壤作用所得的关系式与按标准99%的可靠性完全相符,并用直 The Radio Wave Soil Hygrometer (Type 1) is used to quickly and without contact determine the percentage content of soil moisture changes in the field and in the greenhouse over the entire soil layer. The work of this device is based on the relationship between the absolute value of the electromagnetic wave reflection coefficient of the soil surface | r | and the soil moisture W. Using 487 ± 6 MHz frequency, the relationship between bulk black soil effect and the standard 99% of the reliability of exactly the same, and with straight