玉米是喜温的高产作物。大量的资料分析和生产实践证明,玉米产量变化与各年间的热量条件密切相关。高温年玉米各个发育阶段的气象条件都得到满足则增产,而低温年出现不同程度的减产。分析影响玉米生长发育的温度条件,冷害规律及冷害指标,趋利避害,为玉米稳产高产提供理论依据。 Corn is a thermophilic high-yield crop. A large number of data analysis and production practices have proved that changes in corn yield are closely related to the heat conditions in each year. The meteorological conditions at all developmental stages of high-temperature corn are increased while the low-temperature annual production is reduced to different extents. Analyze the temperature conditions, chilling injury rules and chilling injury indexes that affect the growth and development of maize, and seek benefits and avoid disadvantages, providing the theoretical basis for stable and high yield of corn.