Effect of rooting hormone and media on propagation of chrysanthemum (Dendranthema grandiflorum Ramat Kitam.)
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Date
2020
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The present investigations entitled “Effect of rooting hormone and media on propagation of chrysanthemum (Dendranthema grandiflorum Ramat Kitam.)” were undertaken in the experimental field area of the Department of Floriculture and Landscaping, Punjab Agricultural University, Ludhiana, during the year 2018-2019. The terminal cuttings of two standard varieties of chrysanthemum namely, „Casa Grande‟ and „Snowball‟ were treated with different concentrations of rooting hormones i.e. IBA and NAA @ (100 ppm, 200 ppm, 300 ppm, 400 ppm, 500 ppm and control) with quick dip method and were planted in four rooting media i.e. burnt rice husk, cocopeat, vermicompost, and sand after treatment with hormones. The study was conducted as per factorial completely randomized block design (FCRBD) with 3 replications, 11 main treatments, 4 sub treatments and ten cuttings per treatment. The results obtained in the experiment showed that, in cv. „Casa Grande‟ IBA @ 400 ppm concentration was the best which exhibited the highest number of roots (12.49), the maximum average root length (4.66 cm) and the lowest mortality percentage (19.25%) which was at par with NAA @ 200 ppm treatment which recorded the least number of days to root initiation (8.61 days), the highest rooting percentage, (77.75%) and the maximum plant height (15.37 cm). In cv. „Snowball‟ IBA @ 400 ppm recorded the least number of days to root initiation (8.02 days) with the longest average root length (4.08 cm) with the highest survival percentage (79.09%) which was at par with NAA @ 200 ppm treatment which exhibited the highest number of roots (12.02) rooting percentage (74.68%) and the lowest mortality percentage (20.58%). The effect of different rooting media was also found to be significant; In „Casa Grande‟ burnt rice husk was recorded the best with the highest number of roots (10.20), the maximum average root length (4.16 cm) and lowest mortality percentage (24.58%). Cocopeat was recorded with the highest rooting percentage (68.81%) whereas; in cv. „Snowball‟ burnt rice husk was at par with cocopeat and recorded with the maximum average root length (3.00 cm), and highest survival percentage (65.84%). Burnt rice husk was recorded with highest rooting percentage (66.19%), and number of roots (9.47). Interaction effect of varieties, rooting hormones and rooting media was found significant with regard to root initiation, number of roots, average root length, length of rooted cuttings and plant height. Among the two chrysanthemum cultivars, „Casa Grande‟ performed better over the cv. „Snowball‟.