为了揭示不同追肥时期对花生光合特性及产量的影响，在田间试验条件下，选择花生品种‘青花5号’为材料，对不同追肥时期花生叶面积指数、叶绿素含量、光合速率、产量和产量构成因素等指标的变化进行研究。结果表明：花针期追肥可提高花生叶面积指数，叶面积指数在3以上所持续的时间达到30天以上；功能叶片叶绿素含量保持较高水平；功能叶片净光合速率明显提高；单株结果数显著增加3.5个，果重提高9.7%，从而使花生的经济产量提高9.33%。在花生生产上花针期追肥可作为提高产量的一项技术。

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.