氮肥运筹对雨养条件下春玉米农艺性状影响

Effects of Nitrogen Application on Agronomic Characters in Spring Maize under Precipitation Growth

通过氮肥运筹对雨养条件下春玉米农艺性状的变化研究表明,适当加大氮肥吐丝期施用比例有利于增加生育后期单株叶面积和穗位以下叶片数,提高敏感节位的茎秆压碎强度,从而增加了光合面积,延缓了叶片衰老,延长了光合时间,提高了蜡熟期抗倒伏能力,有利于同化物的积累;氮肥运筹对株高影响规律不明显。

Effects of nitrogen application on some agronomic characters in spring maize under precipitation growth was studied and the results as followed,single plant area and leaf number below ear in later growth stage were improved on account of high ratio nitrogen application in silking stage,as well the stalk crushing strength in dough stage.So the leaf aging was delayed,photosynthetic area was increased and photosynthetic time was prolonged,lodging tolerance was enhanced in dough stage,these factors were helpful...