Effects of Different Qualities of Light and Phytohormones on Seed Germination, Seedling Growth and Establishment of Papaya (Carica papaya) cv. Pusa Nanha
Alan Evon Singh *
Department of Horticulture, NAI, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj-211007, India.
Samir E. Topno
Department of Horticulture, NAI, SHUATS, Prayagraj-211007, India.
Vijay Bahadur
Department of Horticulture, NAI, SHUATS, Prayagraj-211007, India.
*Author to whom correspondence should be addressed.
Abstract
The present study was undertaken to study the effects of different qualities of light and phytohormones (GA3 @ 200ppm) on papaya seed germination, seedling growth, and establishment. The experiment was laid in Randomized Block Design. The experiment comprises of eight treatments viz. T0 {Natural Light (95000 lux)}, T1{Shade Net/Green House (Light 21500 lux)}, T2 {Polyhouse (light 7750 lux)}, T3 {Partially shaded area (light 2800 lux)}, T4 {Fully shaded area (light 880 lux)}, T5 {Incandescent Light (290 lux)}, T6 {Fluorescent Light (3000 lux)}, T7 {Growth Chamber Light (light 2500 lux)}. Among different treatments T6 performed best in terms of Seed germination, Seedling growth and Establishment of Papaya. The findings revealed that treatment T6 {Fluorescent Light (3000 lux)} + GA3 (200 ppm) performed best in term of Days to Germination (8 Days), Germination percentage (94.44%), Number of leaves (9.6), Plant height (16.23 cm), stem vigour index (1444.93), Leaf area (394.4 cm2), Chlorophyll content (41.47 SPAD value) and stem girth (0.37 cm), Establishment Percentage (93.33%). The highest B:C ratio was found in the same Treatment, T6 {Fluorescent Light (3000 lux)} + GA3 (200 ppm), with 3.5.
Keywords: Papaya, light intensities, GA3 200ppm, growth, germination