Study on the application of LED lighting in seedling production of some chryanthemum varieties in Hanoi

Chrysanthemum is a high commercial value plant, which is accounted for a large proportion of the total export of cut flowers in Vietnam. Therefore, the demand for seedling plants is very high. As a short-day plant, chrysanthemum requires supplemental lighting during the 2nd propagation stage in the autumn-winter period. This study aimed to evaluate the applicability of energy-saving LED lights to replace traditional lights in the propagation of some chrysanthemum varieties in Hanoi. The results show that the B3R7 660 nm LED (450 nm blue LED and 660 nm red LED combined in the ratio 7:3) was the most suitable for the 2nd propagation process in the greenhouse of 3 varieties (Pha le Chrysanthemum indicumyellow, Kim cuong C. morifolium cv Kim Cuong and Farm C. morifolium Hibiki). Plants grown under this LED light had a higher shoot multiplication efficiency than those under compact lamps (67.91, 18.47, and 26.89% respectively for Pha le, Kim cuong and Farm). Besides, the quality of seedlings is equivalent to chrysanthemums grown under compact lights. The power-saving efficiency when using LED light was approximate lower 55.21% compared to compact lamps.