Abstract:

 To explore the effect of greenhouse microclimate on the growth of protected tomatoes, two models were established: one for simulating the transverse diameter and another for the single fruit weight. These models incorporated accumulated radiation-heat and the rice clock model, utilizing data on the transverse diameter and single fruit weight of protected tomatoes, as well as concurrent meteorological data including illumination, temperature, and humidity from the greenhouse at Hefei Agricultural Meteorological Experiment Station for the years 2022 and 2023. The accuracy of both was verified using experimental data from 2022. Results indicated that both models effectively simulated the transverse diameter and single fruit weight of protected tomatoes, respectively. The transverse diameter model achieved a root mean square error (RMSE) of 1.03mm, a mean absolute error (MAE) of 0.84mm, and a mean relative error (MRE) of 7.5%. The single fruit weight model achieved an RMSE of 692.59mg, an MAE of 395.44mg, and MRE of 8.2%. Decision coefficients exceeded 0.98 for both models, suggesting they possess practical value and can provide a theoretical foundation for environmental regulation in protected tomato cultivation.

Key words: Plant tomato, Transverse diameter, Single fruit weight, Meteorological factors, Simulation model