Abstract:

In order to show the inference of fertilizer stages on photosynthesis and yield about peanut planting , Qinghua5 was used to test the best stage to fertilizer . Under field conditions , we explore the change of LAI, SPAD, Photosynthetic rate, Yield components based on fertilizer stages. The results suggested that fertilizer on Flower-peg forming stage can improve LAI significantly and the days of LAI>3 is more than 30; the SPAD of available leaves can maintain higher level, the photosynthetic rate of available leave can improve significantly, the pod numbers of single plant increase 3.5, pod weight increase 9.7%, that reduce to the improvement of 9.33% of economic yield. Fertilizer on Flower-peg forming stage can be a technology on increasing the yield of peanut on planting.