The relation of NRA (NRactivity) and nitrogen accumulation of leaves in each growth stage was studied on the two different protein content wheat varieties, Lumai 5 and Changle 5.

• 摘要以鲁麦5号和昌乐5号两种不同蛋白质含量小麦品种为材料，研究了各生育期叶片NRA与氮素积累的关系。