Application of non-parametric system identification to diagnosis of recovery of root from transplanting injury

摘要

The main goal of this study was to develop a method to diagnose when roots had sufficiently recovered from transplanting injury. Plant responses to light intensity, scuch as changes in stem diameter and vapour transpiration, were measured. The light intensity was varied by a pseudo random signal. Cross-correlation functions of light intensity and plant responses were calculated to understand the similarity of the response to the input quantitatively. The results showed that the recovery from the transplanting injury could be diagnosed when the response time lag of plant stem diameters from the top to the lower part of the plant approached the original pre-transplanting level.