Bioelectric Potential Characteristic of Potted Plant for Temperature Change in a Residential Space

Abstract

It becomes obvious that plants are influenced by various kinds of environmental factors, namely temperature, humidity and light intensity. In this study, the influences are examined using the bioelectric potential of the plants. The experiments were carried out in a residential space. One person was living in the residence and a subjective plant was installed in the space. The potential, temperature, humidity, light intensity, atmospheric pressure, sound level and moisture grade in the pot-soil were measured respectively. Some integrated values of the potential characteristics were adopted to derive the influences of the environmental factors. The values were introduced by integrating the characteristic for one hour (vh1), one minute (vm1) or ten minutes (vm10). As for the results, the vh1 became smaller as the atmospheric temperature (tr) became larger, namely negative correlation was recognized among those characteristics. It was also understood that the vh1 characteristic was delayed about one hour than the tr characteristic. The FFT(Fast Fourier Transform) analysis was done to tr and vh1 characteristics and the results for the characteristics were same, namely both characteristics had almost same frequency components. It also became obvious that the vh1 increased as the moisture grade decreased in the pot soil. This result can be applied to the care of plants.