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近20多年来，基于经济效益和环境保护的考虑，国际上对玉米氮素营养效率形成的生理生化基础及遗传改良进行了较深入的研究，并初步用于育种实践。本文对这一方面的进展作一综述。
In the recent 20 years, based on the consideration of economic benefits and environmental protection, the physiological and biochemical basis and genetic improvement of nitrogen nutrition efficiency in maize have been researched deeply and internationally, which are mainly used in breeding practice. This article reviews the progress in this area.