氮肥运筹对玉米叶片光合速率、比叶重和SPAD值的影响  

Effects of Nitrogen Application on Photosynthetic Rate,Specific Leaf Weight and SPAD Value in Leaf of Maize

作　　者：许东恒[1] 石玉海[1] 孙宁[2] 张林[1] 曹铁华[1] 王立春[1] 赵洪祥[1] 

机构地区：[1]吉林省农业科学院,长春130033 [2]吉林大学植物科学学院,长春130062

出　　处：《玉米科学》2010年第6期102-106,110,共6页Journal of Maize Sciences

基　　金：国家科技支撑计划项目(2006BAD02A10)

摘　　要：通过氮肥运筹对雨养条件下春玉米叶片光合速率(Pn)、比叶重(SLW)和SPAD值的变化研究表明,吐丝期追施氮肥有助于提高叶片光合速率,延缓后期光合速率的下降。玉米高密度群体比叶重降低。生育前期氮肥施用比例高的处理,后期SLW下降快;吐丝期氮肥施用比例高的处理,生育后期SLW较其他处理有一定优势,并且在高密度下优势更明显。Effects of nitrogen application on photosynthetic rate(Pn),specific leaf weight(SLW) and SPAD value in maize under precipitation growth were studied and the results as followed,Pn of leaf was increased,photosynthetic time was prolonged in later growth stage due to nitrogen application in silking stage.SLW was low in higher population of maize and it decreased obviously in later growth stage on condition of nitrogen application much in earlier growth stage.SLW had advantage due to nitrogen application in sil...

关 键 词：玉米 氮肥运筹 光合速率 比叶重 SPAD值 

分 类 号：S51[农业科学—作物学]