Effect of bulb sizes, growing substrates and paclobutrazol doses in potted Chincherinchee (Ornithogalum thyrsoides Jacq.)
Loading...
Date
2012
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
ABSTRACT
The present investigations entitled, “Effect of bulb sizes, growing substrates and
paclobutrazol doses in potted chincherinchee (Ornithogalum thyrsoides Jacq.)” were carried out
at the experimental farm of Department of Floriculture and Landscaping, Dr. Y. S. Parmar University
of Horticulture and Forestry, Nauni, Solan (H.P) during November, 2010- June, 2011 to find out the
suitable bulb size, growing substrate and paclobutrazol dose for growth, flowering and presentability
of potted chincherinchee. The experimental treatments comprised of three different sizes of bulbs viz.,
S1 (>2.0-2.5 cm) , S2 (>2.5-3.0 cm), S3 (>3.0-3.5 cm) and five growing substrates viz., M1 = Sand +
Soil + FYM + Vermicompost (1:1:1:1, v/v), M2 = Rai forest soil + FYM + Vermicompost (2:1:1, v/v),
M3 = Rhododendron forest soil + FYM + Vermicompost (2:1:1, v/v) , M4 = Chirpine forest soil +
FYM + Vermicompost (2:1:1, v/v) and M5 = Cocopeat + FYM + Vermicompost (2:1:1, v/v) )
prepared after thoroughly mixing of various ingredients on volume by volume basis and three doses of
Paclobutrazol (i.e. Po @ 0 ppm, P1 @10 ppm and P2 @ 20 ppm). Three unsprouted bulbs of requisite
size treatment-wise were planted in the plastic pots of 8 inches size on 14th November, 2010 as per the
experimental details. The plants were sprayed with different paclobutrazol doses on 21st February,
2011. The observations were recorded on number of days taken for sprouting, number of leaves per
73
plant, leaf size (cm), plant height (cm), plant spread (cm), days taken for spike emergence, number of
florets per spike, floret diameter (cm), stem length/inflorescence length (cm), rachis length (cm),
number of florets opening at a time, duration of flowering, pot presentability and number of bulbs
harvested per pot. The data recorded were subjected to statistical analysis using CRD (factorial).
In general, bulb sizes, growing substrates and paclobutrazol doses have exhibited significant
effects on various growth, flowering and pot presentability attributes of chincherinchee. The earliest
sprouting (9.73 days) was noticed when largest size bulbs (S3) were planted in Rhododendron forest
soil enriched substrate (M3) and maximum time for bulb sprouting (18.45 days) in S1 x M5. 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 presentability score (80.44) as
well as earliest spike emergence (116.44 days) were recorded in S3 × M3 × P2 i.e. growing of largest
size bulbs in Rhododendron forest soil + FYM + Vermicompsot (2:1:1, v/v) and spraying of plants
with 20 ppm dose of paclobutrazol.
Hence, it is concluded that largest size bulbs (>3.0-3.5 cm) of chincherinchee when grown in
the substrate comprising of Rhododendron forest soil + FYM + Vermicompost (2:1:1, v/v) and
sprayed with 20 ppm dose of paclobutrazol resulted in most desirable and best presentable potted
chincherinchee (Ornithogalum thyrsoides Jacq.).