臭椿幼苗吸水、失水特性研究

Study on the Water Absorbing and Losing Characteristics of the Seedling of Ailanthus altissima

以1 a生臭椿幼苗为实验材料,研究其浸水后的吸水特性和室外晾晒条件下的失水特性.结果表明:臭椿幼苗浸水24 h后平均吸水量为3.74 g,含水率提高5%,吸水量与苗木重量呈线性正相关.在晾晒条件下,臭椿幼苗96 h内累积失水约10.38 g,前26 h 内累积失水率约为50%,累积失水率与晾晒时间呈指数函数关系.臭椿幼苗体内含水量与苗木的电容值密切相关.

Using one-year-old seedling of the tree of heaven as the material, this paper studied the water absorbing and losing characteristics of the seedling. The result showed that the average water absorbing quantity of the seedling was 3.74g and the water content percentage was increased by 5%. There was a significant correlation between the water absorbing quantity and seedling’s weight. Under out door condition, the total water losing quantity was about 10.38g, and the water losing quantity during first 26 hours accounted for about 50%. There was an exponential function relation between water losing percentage and the losing time. The electric capacity was related to the water content of the seedling.