Greenhouse crop model and environmental control and management

In this paper，firstly the authors have briefly introduced the general situation of crop model development over the world．secondly have outlined the development and research for greenhouse horticultural model，and finally have analyzed the function and significance of crop model development in environmental control and management of modern agriculture．Besides the discussion as above，the paper，giving an example for tomato crop，has abstractively introd uced the current situation and development for the greenhouse crop simulation system．