Impact of Salicylic Acid and Humic Acid on Growth, Flowering, Bulb Production and Postharvest Management of Lilium Hybrids
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Date
2022-08-03
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Department of Floriculture and Landscaping, OUAT, Bhuabneswar
Abstract
A thesis entitled “Impact of Salicylic Acid and Humic Acid on Growth, Flowering,Bulb Production and Postharvest Management of Lilium Hybrids” was conducted with the objectives to study the effect of SA and HA on growth, flowering, bulb production and postharvest of flower and bulb. Observations were recorded accordingly after one month of planting of bulbs. LA hybrid cv.-Nashville, Merente and Asiatic hybrid Tresor were grown during the year 2018-19 and 2019-20, in winter and rainy season under the poly shade net structure of RKVY project, Dept. of Floriculture & Landscaping at Biotechnology-cum-Tissue Culture Centre, O.U.A.T. Bhubaneswar. The trial was conducted separately for each cultivar with fourteen treatments comprised of foliar application of various concentration of HA and SA and water spray in Control (T1), T2 (250ppm Humic Acid), T3 (500ppm HA), T4 (750ppm HA), T5 (1000ppm HA), T6 (1250 ppm HA), T7 (1500ppm HA), T8 (50ppm Salicylic Acid), T9 ( 75 ppm SA), T10 (100ppm SA), T11 (125ppm SA), T12 (150ppm SA), T13 (175ppm SA), T14 (200ppm SA). The whole experiment was carried out following Randomized Block Design (RBD) with four replications per treatment.
The result revealed that foliar spray of salicylic acid at all concentration i.e. 75, 100, 125, 150,175 and 200 ppm significantly increased all vegetative parameter, flower bud parameter flower growth parameter, bulb yield and post harvest flower and after storage bulbs growth in comparison to humic acid at all concentration (i.e. 250,500,750, 1000, 1250 and 1500 ppm) and control during the year 2018-19 & 2019-20 in both winter &rainy seasons.Maximum plant heightof lilium LA hybrids cv.Nashville, Merente and Asiatic hybrid Tresor in year 2018-19 and 2019-20 were 90.37cm, 83.89cm, 76.14cm &74.17cm, 74.17cm, 74.16cm in winter and rainy season respectively with 200ppm SA. Number of leaves per plant 77.85, 70.45, 88.44 & 69.90, 69.90, 98.79, leaf length 15.85 cm, 14.46cm, 9.35cm & 14.29cm, 14.57cm, 9.82cm, leaf breadth 1.63cm, 2.75cm, 1.46cm &1.60cm, 2.12cm, 1.23cm, leaf Area 27.01 cm2, 32.15 cm2, 14.22 cm2 & 23.18 cm2, 20.80cm2, 11.07 cm2 ,leaf area index 0.62 cm, 0.62cm, 0.64cm &0.41cm, 0.40cm, 0.37cm, total chlorophyll content 92.70g, 84.28g, 79.43g, & 86.70g, 81.75g, 88.82g, basal stem diameter 2.40cm, 2.22cm, 2.03cm, & 2.35cm, 2.12cm,1.79cm and Stalk length 76.49cm, 68.16cm, 69.73cm, & 63.44cm, 65.39cm, 62.02cm, and minimum days to appearance flower bud37.50, 43.63, 39.06 & 37.33, 40.22, 39.02, days to colour visibility in bud, 43.83, 39.63, 47.20 & 41.85, 45.28, 43.98, days to bud break 52.15, 54.57, 51.90 & 53.63, 55.19, 53.47, days from bud appearance to bud break 14.65, 10.94, 12.84 & 16.30, 14.97, 14.45 and maximum number of flower buds per plant 4.87,5.03,4.64 & 4.83, 5.04,4.60, Flower bud length 15.79cm, 17.93cm, 12.89cm & 17.33cm, 18.33cm, 11.74cm, Flower bud width 3.83cm,3.56cm, 1.79cm & 3.19cm, 4.32cm, 1.91cm and initial weight of bud 15.26g, 12.26g,10.52g &14.71g, 12.26g, 10.71g were observed in lilium LA hybrids cv. Nashville, Merente and Asiatic hybrid Tresor in years 2018-19 & 2019-20 in winter & rainy seasons respectively. Minimum Days for opening of first flower 54.15, 57.39, 53.90 & 55.63, 57.59, 57.25, days taken for opening of first flower from appearance of bud 14.65, 17.17, 14.84, &16.30, 17.37,18.23, day to 50 percent flowering 64.15, 66.89, 63.90, & 65.63, 67.39, 65.45 and maximum Number of flowers per plant 4.87, 5.03, 4.64 & 4.83, 5.04, 4.60, flower weight 13.58 g, 17.31g, 12.53g, & 14.27g, 12.52g, 10.98g, flower width 24.41 cm, 20.39cm, 14.53cm &16.84cm, 21.19cm, 13.00cm, length of flower 13.48 cm, 17.93cm, 11.28cm & 17.33cm, 17.93cm, 10.72cm; Pedicel length 10.93 cm, 12.93cm, 7.03cm & 10.91cm, 10.22cm, 6.87cm, & 3.76, 4.21, 5.02, days to bloom life of individual flower 12.55,12.14, 9.48 & 10.93, 12.13, 9.05 and bloom life of whole spike 16.60, 15.60, 14.57 & 15.95, 13.35, 14.50, minimum Days taken for harvesting of flower 76.15, 75.89, 71.90 & 75.63, 76.39, 73.95 and maximum initial diameter of bud at harvesting stage 3.21cm, 4.25cm, 2.85cm &3.25cm,4.05cm,2.89cm, vase life 13.48, 16.50, 9.20 & 12.80, 14.04, 9.20, flower length in vase 12.40cm, 17.09cm, 10.67cm & 11.08cm, 17.98cm, 10.67cm, flower width in vase 20.96cm, 25.08cm, 13.33cm & 19.94cm, 22.59cm, 13.61cm, final weight of flower 11.42g, 12.36g, 11.75g & 11.16g, 12.48g, 12.41g, initial weight of flower 16.59g, 21.10g, 19.06g & 18.05g, 15.99g, 18.92g, water uptake 10.48g, 15.31g, 8.62g & 26.56g, 23.83g, 26.59g, water balance 46.27g, 85.99g, 92.61g & 66.30g, 78.94g, 67.46g, water loss 90.25g, 45.70g, 45.77g & 52.34g, 44.23g ,52.95g, bulb yield per plot 345.99g, 364.54g, 410.42g & 375.25g, 340.76g, 385.15g, bulb lets yield per plot 68.02g, 62.49g, 43.91g & 62.74g, 68.15g, 73.66g, diameter of daughter bulbs 1.83cm, 1.77cm, 1.74cm & 1.76cm, 1.10cm, 1.71cm, circumference of bulb 15.36cm, 13.89cm, 13.68cm & 14.44cm, 10.71cm,13.32cm, number of effective roots 14.75, 9.57, 12.63 & 12.75, 10.11, 12.00 and length of effective roots 9.15cm, 8.74cm, 8.38cm & 8.98cm,7.86cm,8.46cm, weight of bulb 39.09g, 36.34g, 32.26g & 35.43g, 36.59g, 33.34g, shoot length of bulb 11.89cm, 11.22cm, 9.85cm & 10.91cm, 6.91cm , 9.07cm, scale size 1.82cm, 1.75cm, 1.53cm & 1.78cm, 1.04cm, 1.53cm, and root length of bulb 10.08cm, 9.50cm, 8.13cm & 10.01cm,6.00cm,7.96cm and minimum days to shoot emergenc of bulb 55.11, 57.89, 56.72 & 68.18, 67.53,61.69 were observed in lilium LA hybrids cv.Nashville, Merente and Asiatic hybrid Tresor in years 2018-19 & 2019-20 in winter & rainy seasons respectively with 200ppm SA.