Effects Of Light On Flowering Of Cut Flowers Of Autumn Chrysanthemum

Chrysanthemum (Dendranthema× grandiflorum (Ramat.) Kitamura) is a traditional famous flowering pot plant in China, taking about 30% of word market as cut flower. For improving our own industry of the cut flower of chrysanthemum and keeping pace with the international market, some important technology in production was paid more attention to now.Some cut flowers of autumn chrysanthemum were used as material in this study. Through different medium formula, different hormone and concentration experiments, the best condition for the great consistency of vegetative and procreative growth was found. Based on this, further study on the influence of different day-length and light spectrum on chrysanthemum growth was taken and then the meanings of light to the bud differentiation and florescence were discussed.The study results indicated: (1) the medium of vermiculite adding peet is best for variety 'shenma' on synthesizing index of radication, vegetative growth , harvest day and so on; (2) when hormone concentration was up to lOOOppm, the synthesizing index of variety 'shenma' was best; (3) the critical day length and the process of bud differentiation of 14 varieties were confirmed, which also improved and enforced the influence of day length to plant growth; (4) orange light could improve the growth of chrysanthemum, while the blue light had the dwarf effect.This study could supply best data on radication and supplement light for chrysanthemum production and set up the testing system for the valid supplement light of different varieties, making it convenient for other varieties' testing and supplying the right experiment condition for studying efflorescing mechanism.