| This paper studied the effect of various ratio of nitrogen and potassium on change of photosynthetic pigment and soluble protein to reveal variation of senescence character. The result indicated that the different ratio of nitrogen and potassium could influence senescence characters of Byou827爷s flag leaf. The difference was obvious among different items and growth periods, especially in filling stage. In condition of N180K135, flag leaf still contained higher photosynthetic pigment and soluble protein. This can devote to delay senescence and increase production of Byou 827. |
