Effect of bulb sizes, growing substrates and paclobutrazol doses on potted Chincherinchee (Ornithogalum thyrsoides Jacq.)

Abstract

The experiment was carried out during 2010- 2011 to find out the suitable bulb size, growing substrate and paclobutrazol dose for desirable growth, flowering and display ability of potted chincherinchee (Ornithogalum thyrsoides Jacq.). The experimental treatments comprised of three sizes (>2.0-2.5, >2.5-3.0 and >3.0-3.5 cm) and five growing substrates and three doses of paclobutrazol (0, 10 and 20 ppm). In general, bulb sizes, growing substrates and paclobutrazol doses have exhibited significant effects on various growth, flowering and pot display ability attributes of chincherinchee. The highest values for most of the desirable parameters, viz., plant spread (23.39 cm), number of florets opening at a time (28.56), duration of flowering (39.11 days) and pot display ability score (80.44) were recorded in S3 × M3 × P2 in rhododendron forest soil + FYM + vermicompost (2:1:1, v/v) and spraying of plants with 20 ppm paclobutrazol.