LED LIGHT SUPPLEMENTATION ON GROWTH, YIELD AND SEED PRODUCTION OF BROCCOLI

An experiment was conducted in Horticulture Farm, Sher-e-Bangla Agricultural University during the period of December, 2015 to March, 2016 to evaluate the influence of day length extension with LED light supplement on growth, yield and seed production of broccoli (Brassica oleracea var. Italica L.). Four LED light supplementation treatment viz. L_W= White LED, L_B= Blue LED, L_R= Red LED and L_R+B= Both Red & Blue LED were used along with one control (L_C= No supplementation) in this experiment arranged in Randomized Complete Blocked Design (RCBD) with three replication. L_R+B treatment showed the best result in most of the parameters studied (weight of curd= 382.5 g, diameter of curd= 10.5 cm, yield/plot= 8.4 Kg, yield/ha= 7.4 ton, no. of seed/pod= 12.0, no. of seed/plant= 1279.0) and to the rest showed statistical similarity to the highest. Highest germination percentage of the produced seeds was also found from this treatment (87.3%). So, day extension with combination of red and blue led can be used as a sustainable technique to produce viable seeds of broccoli along with better production.