Relationship Between Electrical Signals Of Agave Americana Var.marginata And Its Ability To Release Negative Air Ions

Negative air ion(NAI)is also referred to as "the vitamin in the air","auxin" or "longevity element".NAI in busy cities only varies from tens to hundreds,compared with thousands in the forests.NAI is released naturally from various sources including plants.The release of negative air ions concentration is related to the factors such as sorts and growth period.The literature shows that ion movement in plant is closely related to the plant electrical signal change rule.Agave Americana var.Marginata can release negative air ions,therefore this article attempts through the analysis of its electrical signals under different conditions and the corresponding relation between the release of negative ions concentration,to explore the mechanism of its release negative ions mechanism,to guide how to choose the more suitable plants as a source of negative ions,to form the best from the comprehensive effect of various parameters,to release most NAI under certain conditions and minimal effect on plant growthFirstly,the paper has designed two groups of experiments which one based on lighting and the other on stimulation of electrical pulses.In order to get different electrical signals,so it changed the parameters of stimulation.It therefore used plant electrical signal acquisition system,to collect plant electrical signal under the various stimulation parameters and also to detect corresponding NAI.Secondly,the result can be seen from the single factor analysis of variance of amplitude of plant electrical signal in Agave Americana var.Marginata.Light groups:F 0.95(8,9207)=66.36>F;electrical stimulation groups:F 0.95(6,7161)=22.3471>F.So the amplitude of electrical signal and the ability of releasing negative air ions are highly significant.Again after de-noising signals from different stimulus conditions,we performed the power spectrum analysis.We concluded that increasing stimulus intensity leads to a gradual increase in plant energy.At the same time,using the db4 as 5 layers of decomposition,the low frequency band was able to reflect most of the plant electrical signal characteristics.By further calculating the power spectrum,we found out that most energy of plant concentrates in low frequency band.With the increasing stimulation intensity,the low frequency band energy gradually occupies greater proportion.It therefore suggests that improving low frequency energy in plant can improve its ability to release NAI.Lastly,by analyzing lighting and electrical stimulation groups,with increasing light stimulus intensity,the ability to release NAI was enhanced in Agave Americana var.Marginata.This could possibly be explained by the fact that under the action of photosynthesis,plants accelerates electronic chain transferring.During the process,the negative electrons and oxygen molecules produced increases capture binding force resulting in more negative air ions.Also,by increasing the intensity of electrical stimulation of Agave Americana var.Marginata,more negative air ions were released.This could possibly be explained by the fact that under appropriate stimulation parameters,the plant can be coupled with environmental stimulation helping it to absorb energy from outside thus improving its ability to release negative air ions.In conclusion therefore,it found out there was a significant correlation between a plant’s electrical signals and its ability to release negative air ions.