基于茎流传感器的茎秆储水动态观测方法  

Method for Observing Stem Water Storage Dynamics Based on a Sap Flow Rate Sensor

作　　者：员玉良[1,2] 盛文溢[1] 孙宇瑞[1] 

机构地区：[1]中国农业大学信息与电气工程学院,北京100083 [2]青岛农业大学机电工程学院,青岛266109

出　　处：《农业机械学报》2014年第5期247-252,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：中德联合研究小组项目(GZ494);中国农业大学研究生科研创新专项(2013YJ008)

摘　　要：植物茎秆储水每天都会发生周期性变化。针对目前缺少对草本植物茎秆储水无损测量传感器的问题,提出了一种基于茎流传感器的草本植物茎秆储水动态观测方法。该方法以温室盆栽向日葵为试验对象,通过茎流传感器及电子秤的输出,得出向日葵茎秆储水状况及其内部充放水状态切换时间。向日葵茎秆直径动态变化的观测结果进一步验证了该方法的有效性。同时,该方法还可以采集向日葵所处环境下的微气象因子变化,试验结果表明微气象因子变化是引起茎秆储水动态变化主要因素。Stem water storage varies with a daily cycle. However, none of sensor techniques can meet the noninvasive measurement of herbaceous plant stem water storage. A method of using a sap flow rate sensor to observe stem water storage dynamics for herbaceous plants was proposed. The preliminary experiment was conducted with a potted sunflower. The sunflower stem internal water recharging/discharging and its switching time could be obtained by the outputs of a sap flow sensor and an electronic scale. The observation of sunflower stem diameter variations further validated the effectiveness of the method. At the same time, the micro meteorological factors could be collected and the results showed that the micro meteorological factors had a great impact on stem water storage dynamic changes. Compared with other methods, the measurement system is simple, easy to operate and non destructive. Even though only sunflower samples were investigated, the method can be also applied to other herbaceous plants.

关 键 词：草本植物 茎秆储水 茎流传感器 观测 

分 类 号：S24[农业科学—农业电气化与自动化]