When the nitrogen level is N4(168mg/kg) , compared with N1 , increasing the accumulating amount of material 48% , chlorophyll content 68% ,Pro content 9% ,and depressing MDA content 32% of Lolium.

• 当施氮水平为N4(168mg/kg)时，与N1相比，提高了黑麦草于物质积累量48.；5%25，叶绿素含量67