Effect of growth regulators on propagation of Song of India (Dracaena reflexa Lam.)
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Date
2019
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Punjab Agricultural University, Ludhiana
Abstract
The present investigations entitled ―Effect of growth regulators on propagation of Song of
India (Dracaena reflexa Lam.)‖ were undertaken at research farm of Department of
Floriculture and Landscaping, Punjab Agricultural University, Ludhiana during 2018-19.
Terminal cuttings of Song of India were treated with five concentrations each of IBA (100,
200, 300, 400 and 500 ppm) and NAA (100, 200, 300, 400 and 500 ppm) for three minutes.
Treated cuttings were planted in two rooting media i.e. sand and water during second
fortnight each of February and July along with control treatment. Results showed that number
of days taken for sprouting of cuttings were least when cuttings were treated with IBA 200
ppm (18.58) and NAA 300 ppm (18.67). Rooting percentage, root length, number of roots,
fresh and dry weight of roots, shoot length and stem thickness were observed maximum with
IBA 200 ppm and NAA 300 ppm. Survivability of plants was recorded maximum (100 %)
with IBA 200 ppm, IBA 300 ppm, IBA 400 ppm, IBA 500 ppm, NAA 200 ppm and NAA
300 ppm. Number of leaves was recorded highest with IBA 200 ppm (12.54) and NAA 200
ppm (12.12). Among planting times, second fortnight of February had significant effect on
number of days taken for sprouting of cuttings, dry weight of roots, shoot length, stem
thickness and number of leaves, while second fortnight of July gave maximum rooting
percentage, root length and percentage survival after three months of transplanting. To
conclude, cuttings of Song of India treated with IBA 200 ppm and NAA 300 ppm in the
month of July and planted in sand media were found to be the best for its propagation.
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