Abstract: Based on the extended biological holographic theory and on the holographic relationship between the blood circulation in human body and the material circulation in agro ecosystem, the following five factors which affect the circulation function of agro ecosystems were identified: single harvest yield, multiple cropping index, waste extent of fodder, fodder conversion efficiency and circulation quantum. The formula for calculation of arterial pressure in human body has been applied in the study of agro ecosystems. The model for expression of the relationship between motive and resistance factors in the circulation of ago ecosystems has been established.

Key words: agro ecosystem, circulation, function, comprehensive evaluation, method