Modeling the growth of 'Isabel' grape fruits

Abstract

The modeling of fruit growth is important mainly in physiological and plant growth studies, allowing the monitoring of fruit growth and the follow-up of their development in a non-destructive way. Since no studies were found in the literature to model the growth of 'Isabel' vine fruits, the objective of this work is to adjust a growth curve for the fruits, verifying if the same equation can be applied to two production seasons. year in the north of the state of Espírito Santo. To adjust the growth curves, simple linear, quadratic, cubic, power and exponential models were used, with the weight of the berries as a function of the diameter and length of the berries. The validation of the equations was carried out using the same berries as the estimates of the equations through Pearson's linear correlation, root mean square error, Willmott's agreement index and required sample size to estimate the equation. The power model using the diameter as an independent variable is the equation that best explains the weight of the fruit of the 'Isabel' grape.