Abstract
In order to achieve the sustainable development in multi-span plastic greenhouse with high efficiency, this research established the mathematical model of the environment for cucumber production in coupling with the biological model of it, by making use of the knowledge of heat transfer, thermodynamics and the principle of energy balance as the research platform. The simulation was carried in MATLAB environment, tested and verified with actual experiments. As a result, the model was proofed with clear and definite significance in physics, being easy to emulate and being identical with the date of the experiments. By taking the soil simulation model as an example, it wins a higher credit value with 0.8999 for R-2, the absolute error being in +/-0.85 degrees C, the mean relative error being 9.1, and the standard error for the a and b being 0.0352 for S-a, 0.1033 for S-b, in the regression analysis, except for the case of the surface soil