Effects of Shading on Growth and Florescence of Marigold

The marigold was treated with different shading levels in order to study the effects of shading on the growth,fresh weight and anthesis.The result indicated that different shading level had a significant effect on the growth and anthesis of marigold.With the increasing of shading level,the growth rate of marigold became slower and slower,plant height,branch number was lower significantly,and plant fresh weight was also less than the control.At the same time,because of shading,the bloom time was delayed and the anthesis was shortened,the number of flowers was also decreased evidently.So the shading treatment affected badly the quality of marigold.