在玉米生产中经常发生果穗顶部秃尖、缺粒现象,对玉米的产量和品质影响很大,轻者减产3％～10％,重者高达20％以上。造成玉米秃尖缺粒的主要原因有以下几个方面: 一是授粉不良 抽雄期遭遇连阴雨天气,花丝下垂、覆盖在下面的花丝未能授粉,出现一侧缺粒;雌穗吐丝较晚,花粉不足,出现满天星缺粒。 二是营养缺乏 花丝生长期,缺磷影响 In the corn production often top of the ear tip bald sharp, lack of grain, corn yield and quality of a great impact, the light reduction of 3% to 10%, as heavy as 20% or more. The main causes of bald sharp corn deficiency in the following areas: First, poor pollination tasseled even encounter rainy weather, filaments sagging, covered in the following filaments failed to pollination, there is a lack of grain on one side; ear spattering later, Pollen deficiencies, lack of gypsophila. Second, the lack of nutrition filaments growth period, phosphorus deficiency