Rice is one of the most important crops in China. Information technology，especially rice modelling，will be very useful to rice cultivation and breeding. In this paper, the author preliminary summarized most of plant models and divided them into three categories, process based model （PBM, or functional model）, structural model and functional-structural model （FSPM）. Then the authors briefly told their role in rice cultivation and breeding. The process based model could be used to: predict the rice growth and yield, support the farmer or government to make decision on rice production together with remote sensing technology （RS） and geographic information system （GIS）, do virtual experiments which could not be conducted in the field or would cost a lot. Structural model could be used to quantitatively describe the canopy in detail, calculate the potential photosynthesis capacity of different cultivar canopies and evaluate the rice ideotype, etc. The functional-structural model could be used to simulate the biomass allocated among different organs and then simulate and find the appropriate way to get more productive rice cultivars. The authors also discussed the reasons why the model could not be used broadly and gave some solutions.
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