Abstract: The sowing date experiment of waxy maize,with a waxy maize hybrid variety Xiangbainuo,sowed in Autumn 2004 in Guangzhou was conducted to study the influence of sowing date on main quality components of wax maize during grain filling stage.The results showed that different sowing dates were not able to change the trend of main components,but it had greatly influenced on the contents of maize components.The average content of soluble protein,crude protein,fat and starch of waxy maize kernel in early sowing date(September 3) was higher than that of the late sowing date(September 23) by 0.87mg/g,2.68%,1.0% and 4.96% respectively.The average contents of maize grain's soluble protein,crude protein,fat and starch in early sowing date was higher than that of the late sowing date by 0.74mg/grain,9.67 mg/grain,2.3 mg/grain and 25.52 mg/grain respectively,while the seed water contents in early sowing date was declined by 1.37% each day after pollination,it was more quickly than that of the late sowing date by 0.44%.It was suggested that the suitable sowing date of waxy maize in Guangzhou was before the second week of September.

Key words: Sowing date, Sowing date, Autumn sowing, Waxy maize, Main quality components.