The effects on nitrogen metabolism and peroxidase were studied by different photoperiod and vernalization of Red Creole, Red Leaf NO. 3, and Creewo.

• 采用不同光周期处理；以红太阳(Red Creole；RC；易抽薹品种；美国引进)；红叶三号(Red Leaf NO.；3；RL；耐抽薹品种；日本引进)与克里奥(Creewo；CR；中耐抽薹品种；美国引进)为试材；研究洋葱对不同光周期的生理生化反应。