关键词: 玉米, 节本, 增产, 技术模式, 辽东

Abstract: In view of the problems in eastern of Liaoning, such as heavy rainfall, overcast rain and little sunshine during maize flowering, serious maize lodging, heavy occurrence of diseases and pests, and few varieties suitable for machine harvest, the techniques such as density-tolerant hybrid selecting, chemical regulation applying, no-tillage practice, nitrogen high efficiency utilization and seed coating controlling pests and diseases were studied from 2017 to 2019. Based on these techniques, maize dense planting, anti-logging, saving cost, high yield and efficient total mechanization operation technical model was built. This technical model applied in Baiqi and Baoshan area of Fengcheng from 2018 to 2019, the results showed that maize yield increased 15.9%~33.3%, plant anti-logging ability and stability improved, PFPN（Partial factor productivity from applied N） increased by 27.1%, maize mechanical kernel realized. At the harvest, the water content of kernel was 25%~28% and the average yield was 11 827.5 kg/hm², labor cost decreased and saved cost by 1 800~2 700 RMB per hectare. In summary, this technical model came true the objective of saving cost, increasing yield and efficiency in a green way of production, provided the technology support to the local maize production.

Key words: maize, saving cost, improving yield, technical model, eastern of Liaoning