Under the same conditions of nitrogen fertilizer quantity,through the contrast experiment of corn of the growth index and yield,the function of nitrogenous fertilizer inhibitor on control to the nitrogenous fertilizer release was studied.It was found that one time and deep application of the nitrogen fertilizer mixed with Feilong could satisfy the nitrogenous nutrient which maize needed in the whole period.The content of chlorophyll increased and leaf age delayed.The leaf area index,photosynthesis potential and rate,accumulative of dry matter increased.Yield components of maize were affected greatly,and crop production increased obviously.