Vol. 9, Issue 7 (2020)

Author(s):
Akash Bhargaw and Priyamvada Chauhan

Abstract:
Influence of various light intensities with various photoperiods on metabolism and growth on two variety of lettuce plant were evaluated in this studies. Light emitting diodes (LEDs) were selected as source of light in four different intensity i.e., 200, 230, 260, 290 μmol·m-2·s-1 PPFD, with three different photoperiods (light/dark) 18/6 (1 cycle), 9/3 (2 cycle), and 6/2 (3 cycle) were used in experiment. Maximum plant height and fresh shoot weight was observed in treatment combination of 290-9/3 (light intensity-photoperiod), while longest root and its fresh weight with maximum dry leaf weight were recorded in plants grown under treatment 290-18/6. But maximum dry root weight, maximum number of leafs and largest leaf area were recorded in treatment combination of 290-6/2. By this we can conclude that use of 290 PPFD of light at 6/2 photoperiod is most energy efficient method to grow lettuce using LED light in plant factory.