Taoyuan agricultural and ecological experiment station of the Chinese Academy of Sciences is selected as the representative area of red soil hilly region for the study of the land potential productivity. Using the principle of mechanism method and combining with productivity index model to calculate land potential productivity. The results showed that most actual yields of early rice investigated are 83.0%～92.7% of the land potential productivity. Although all the actual yields of the second rice are higher than the land potential productivity, they are in the reasonable range. The calculated land potential productivity can reflect the actual rice productivity well. Amount of precipitation, soil’s pH value, content of organic matter and rapidly available phosphorus are the main factors that limiting the rice productivity.

mechanism method; rice; productivity index model; land potential productivity