摘要： 采用三因素二次饱和D-最优设计方法，对不同密度、施氮量和播期的，春玉米胚的形态建成及脂肪含量变化研究结果表明，春玉米胚建成过程中，其鲜重、干重、体积均呈直线递增变化，递增幅度以鲜重>体积≥干重；而含水率则呈直线下降趋势。密度增加、施氮量增大或播期延迟，均使胚的鲜重、干重、体积有不同程度的下降，含水率则有不同程度的增加。胚中脂肪含量总的变化趋势呈单峰曲线，峰值出现在授粉后第35天。随密度增加、施氮量增大或播期延迟，胚中脂肪含量均在峰值之后下降缓慢，成熟时脂肪含量均有增加。

关键词: 玉米, 胚, 栽培措施

Abstract: The method of three factors second degree saturation D-optimum design was adopted in this experiment.The changes of fat content and morphology in embryo were studied under different treatments of density, nitrogen application and sowing date.The results showed that,during embryo establishment the fresh weight,dry weight,volume increased progressively,speed of growth was fresh weight >volume>dry weight.The moisture content decreased progressively.When the density and nitrogen application increased or sowing date being postponed,the fresh and dry weight,volume were falling, but moisture content was growing in the embryo.The whole change trend of fat content showed a single Peak curve,the peak value was 35d after insermination.With density and nitrogen application being increased or sowing date being postponed,the fat content was slowly falling after the peak value, but increased at mature period.

Key words: Spring maize, Embryo, Culture practices

中图分类号: 

• S513.01