Modeling dynamic behavior of leaf temperature at three-dimensional positions to step variations in air temperature and light

Organisms such as plants grow as a result of the influence of their generic s and microenvironment, consisting of physical, chemical, and biological fa ctors. The microenvironment or microclimate is the environment closely surr ounding these organisms and varies in time and space. To control processes more optimally, it is necessary to understand how living organisms respond dynamically to their physical microenvironment. Most models being developed to explain this relationship through steady-state models are descriptive ( deterministic) and too complex to be used for control purposes. Therefore, it is attempted in this work to develop a dynamic black box model. For this study only air temperature was considered in 3-D (three dimensions). The o bjective of this research was to model the dynamic response of leaf tempera ture to time variations in air temperature closely surrounding that leaf an d to light-dark alterations. This biosystem is modeled using an ARX model s tructure (black box). Three-dimensional gradients in air temperature around the plans were shown and analyzed. It is demonstrated that a complex proce ss such as the response of leaf temperature to changes in 3-D ambient air t emperature and light-dark alterations can be modeled with a mean 1-2 betwee n 92.7% and 99.9%.