The different density and under nitrogenous fertilizer employment quantity, the fresh food glutinous com adult plant single obvious green leaf number and launches the green leaf number, Single blade area, the leaf area index, the photosynthesis potential, function leaf' s chlorophyll a, chlorophyll b and the chlorophyll a b, the function leaf only photosynthesizes the speed and so on to assume the single peak change curve. The single obvious green leaf number and launches the green leaf number, Single blade area, the leaf area index, the photosynthesis potential, function leaf' s chlorophyll a, chlorophyll b and the chlorophyll a b, the function leaf only photosynthesizes the speed and so on to increase along with nitrogenous fertilizer employment quantity the increase; But eliminates the leaf area index, the photosynthesis potential increases along with the density increases, other targets drop along with the density increase.