耐寒植物根部导热系数测定

Determination of Coefficient of Thermal Conductivity in Hardy Plants Roots

采用KD2 Pro热特性分析仪测定不同温度下耐冬(Common camellia)和樱花树(Flowering cherry)两种植物根部的导热系数,并得到不同温度范围内根部导热系数与温度间的近似关系式。通过对比分析导热系数曲线得出结论:耐寒植物根部的导热系数在0℃以上随温度的升高变化不大,在0℃以下随温度的降低而迅速升高;非耐寒植物根部的导热系数,随温度的升高变化不大,在一个很小的范围内上下波动;环境温度在10℃以下,耐寒植物根部的导热系数都大于非耐寒植物根部的导热系数。

The coefficient of thermal conductivity of two kinds of roots （separately Common camellia and Flowering cherry） were determined by KD2 Pro Sensor Compatibility, and the approximate relations between the coefficient of thermal conductivity of root and temperature were obtained as well. It is concluded by contrasting curves of coefficient of thermal conductivity that the coefficient of thermal conductivity of hardy plant roots changed little with increasing temperature above 0 ℃, nevertheless, it increased rapidly with decreasing temperature below 0 ℃ ; the coefficient of thermal conductivity of non-hardy plant roots fluctuated within a small range with the temperature change; the coefficient of thermal conductivity of hardy plant roots was always larger than that of non-hardy plant roots when the temperature was below 10 ℃.