Evaluation of a model for simulating the potential production of rice
1989
Reyes, C.H. | Penning de Vries, F.W.T. (International Rice Research Inst., Los Banos, Laguna (Philippines))
The MARCOS L1D model was used for the calculation of the potential production of rice. The model considers different physiological and physical processes affecting crop growth and development. Crop parameters, weather variables, and management factors are inputs in the model. The simulation program calculates the rates of growth and weights of the different organs. When the model was evaluated using experimental data from IRRI [International Rice Research Inst., Los Banos, Laguna, Philippines], it gave reasonable estimates of the weights of the different organs. However, the model performance can be improved by providing more accurate values of the initial weights. The build up and redistribution of carbohydrate reserves should also be studied more. The simulated grain yield was sensitive to changes in some physiological parameters and management factors. Model runs using long term weather data confirmed that the highest grain yields in Los Banos, Laguna, Philippines are obtained for plants that flower around February and March. Lower yields can be expected for plants that flower during October and November. The variabilities of the yields are higher from plants flowering around mid-May to December. Such results can be used to determine how well crops in a certain season performed compared to the long term average
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