PJB-2017-230
MODELLING OF TOMATO STEM DIAMETER GROWTH RATE BASED ON PHYSIOLOGICAL RESPONSES
ZHIYU ZUO, JIE TAN, LIN LI, HANPING MAO, XIAODONG ZHANG, LIJUAN QIN, TIANYUAN LV AND MINMIN ZHUO
Abstract
The stem diameter is an important parameter describing the growth of tomato plant during vegetative growth stage. A stem diameter growth model was developed to predict the response of plant growth under different conditions. By analyzing the diurnal variations of stem diameter in tomato (Solanum lycopersicum L.), it was found that the stem diameter measured at 3:00 am was the representative value as the daily basis of tomato stem diameter. Based on the responses of growth rate in stem diameter to light and temperature, a linear regression relationship was applied to establish the stem diameter growth rate prediction model for the vegetative growth stage in tomato and which was further validated by experiment. The root mean square error (RMSE) and relative error (RE) were used to test the correlation between measured and modeled stem diameter variations. Results showed that the model can be used in prediction for stem diameter growth rate at vegetative growth stage in tomato.
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