玉米果穗缺粒是玉米生产上常见的问题。缺粒玉米,一般减产8％～15％,严重时达到20％以上。 一、玉米果穗缺粒的原因: 生育后期养分、水分不足,顶部花丝吐出晚,雌花退化,柱头变态,花丝叠压,降雨偏多,光照不足等均能导致缺粒。玉米果穗缺粒有5种类型,即顶部不实型、顶尖秕粒型、满天星缺粒型、基部不实型和 Corn ear missing grain is a common problem in corn production. Miss grain corn, the general reduction of 8% to 15%, in severe cases reached 20% or more. First, the reasons for lack of corn ear of corn: late growth and development of nutrients, lack of water, the top of the filament spit late, female degeneration, stigma metamorphosis, filament overpressure, excessive rainfall, lack of light and so can lead to missing particles. There are 5 types of maize ear missing grain, namely the top is not real type, top 秕 grain type, Gypsophila paniculate type, the base is not real type and