中文摘要：

采用集总参数法研究了几种植物叶片的热时间常数、表面对流换热系数．结果表明：（1）静风条件下，植物叶片符合传热学规律，可以用集总参数法分析其传热特性；（2）叶片热时间常数碧玉为（298±38．9）s，长寿花为（263±40．9）s，绿萝为（108．7±9．9）s，番茄为（75±22．9）s，（3）静风条件下植物叶片的对流换热系数，碧玉为（8．23±2．07）W·m^-2·℃^-1；长寿花为（8．67±1．66W·m^-2·℃^-1；绿萝为（7．06．4-2．43）w·m^-2·℃^-1；番茄为（6．8±1．34）W·m^-2·℃^-1．（4）热时间常数与叶片厚度有较明显的关系，二者线性回归方程为r=137．23TH＋44．92，在0．01信度下通过检验，叶片越厚，热时间常数越大．

英文摘要：

The heat physical characteristics, convection coefficient of tomato and other plants were studied using lumped parameter method. The results showed ： （ 1 ） on condition of static wind plant leaf conformed to heat transfer law and lumped parameter method could be used to analyze the character of heat transfer; （2） the heat time constant （r） of tomato leaf was （75 ±_ 22.9） s, winter pot kalanchoe was （263 ±40.9） s; Peperomia tetraphylla was （298 ：t：38.9） s; Araceae was （108.7 ±9.9） s; （3） on the condition of static wind, the convection coefficient of tomato leaf was （6. 8 ± 1.34） W m^ -2 · ℃^-1 , that of winter pot kalanchoe was （ 8.67 ± 1.66 ） W · m ^-2· ℃ , of Peperomia tetraphyl- lawas （8.23 ±2.07） W · m^-2 · ℃^-1·, that of Araceae was （7.06 ±2.43） W· m^-2 · ℃^-1（4） there was clear relation between the heat time constant of plants and thickness （TH） of plant leaves, the regression equation of which was ·＂ = 137.23 TH ± 44.92, and passed through the significant test at 0.01 reliability.