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玉米生产过程中,空秆、秃尖、倒伏等生理病害的发生往往对生产常造成严重的损失。玉米生理病害发生的原因一是内部因素,即遗传因素的影响,如品种抗逆性不强,种子生活力弱,种子发育不健全。二是外界环境条件,如土壤、肥料、水分、空气与光照等条件不良,阻碍玉米的正常发育,形成生理病害。因此,探讨生理病害的发生原因及防治对策,对减轻或避免玉米生产中生理病害造成的损失有重要意义。1玉米倒伏除气象因素外,还有以下四个原因:一是种植密度
In the process of corn production, the occurrence of physiological diseases such as empty stalks, bald tips and lodging often causes serious losses to the production. Physiological diseases of corn one reason is the internal factors, that genetic factors, such as resistance to species is not strong, weak seed vitality, seed development is not perfect. Second, the external environmental conditions, such as soil, fertilizers, moisture, air and light and other poor conditions, hinder the normal development of corn, the formation of physiological diseases. Therefore, to explore the causes of physiological diseases and prevention and control measures to reduce or avoid the loss of physiological diseases caused by corn production is of great significance. 1 In addition to meteorological factors lodging corn, there are the following four reasons: First, the planting density