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...
出处
《玉米科学》
CAS
CSCD
北大核心
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)
关键词
玉米
氮肥运筹
光合速率
比叶重
SPAD值
Maize
Nitrogen application
Photosynthetic rate
Specific leaf weight
SPAD value
