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“STANDARDIZATION OF PRUNING AND PROPAGATION TECHNIQUE IN ARABIAN JASMINE (Jasminum sambac)”

KrishiKosh

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Title “STANDARDIZATION OF PRUNING AND PROPAGATION TECHNIQUE IN ARABIAN JASMINE (Jasminum sambac)”
 
Creator REVULAGADDA POORNA CHAITANYA
 
Contributor Dr.C. CHANDRASEKHARA RAO
 
Subject defoliated leaves ,arial biomass, rooting percentage, root length, root number
 
Description The present experiment entitled “STANDARDIZATION OF PRUNING AND PROPAGATION TECHNIQUE IN ARABIAN JASMINE (Jasminum sambac)”was carried out during November 2012 to June 2013at Horticultural College and Research Institute, Dr. Y.S.R. Horticultural University, Venkataramannagudem, West Godavari district of A.P.The present investigation was taken up in three experiments i.e., i) Effect of pruning date and intensity of pruning on growth and flowering of Jasminum sambac genotypes. ii) Effect of defoliating chemicals (chemical defoliation) on growth and flower yield of Jasminum sambac. iii) Effect of auxin concentration and number of nodes on rooting and per cent establishment of Jasminum sambac cv. “Double Mogra”. The experiment (i) was laid out in split plot design replicated thrice with 36 treatment combinations, comprising of three genotypes (main treatments)viz., Nityamalli (T1), Tuppamalli (T2) and Starmalli (T3) at three different pruning dates (sub treatments)viz., pruning in November 10th of 2012 (ST1), December 10th of 2012 (ST2), January 10th of 2013 (ST3) and four levels of pruning heights(sub - sub treatments) viz., 25 cm from ground level (SST1), 50 cm from ground level (SST2), 75 cm from ground level (SST3) and un pruned bushes (SST4). The experiment (ii) was laid out in Randomized Block Design replicated thrice with16 treatment combinations Three genotypes or local varieties of Jasminum sambac Nityamalli (T1), Tuppamalli (T2) and Starmalli (T3) with 16 chemical concentrations viz., manual defoliation, paraquat dichloride (500ppm, 1000ppm, 1500ppm, 2000ppm and 2500ppm), sodium chloride ( 1000ppm, 2000 ppm, 3000 ppm and 4000 ppm),potassium nitrate (1 %, 2 %, 3 %, 4 % and 5 %)and control (water spray).The experiment (iii) was laid out in Factorial
Randomized Block Design replicated thrice with 16 treatments viz., Factor 1: number of nodes T1: 1st node, T2: 2nd node, T3: 3rd node and T4: 4th node. Factor 2: chemical concentrations (IBA) C1: 1000 ppm, C2: 2000 ppm, C3: 3000 ppm and C4: control. Among the genotypes, Nityamalli pruned in December’12 at 50 cm height from ground level has exhibited the highest the number of laterals per primary shoot, productive shoots per plant, leaves per primary shoot, leaf area per shoot, number of petals per flower, flower bud diameter, weight of flower buds/plant (g), weight of flower bud/m2 plot (kg) and weight of flower bud/hectare (tonnes). Whereas the trait, days to flower bud development was recorded minimum in Nityamalli pruned in January’13 at 75 cm height from ground level. The duration of flowering was more in Nityamalli pruned in November’12 at 50 cm height from ground level. The traits viz., longer primary shoot length, shoot thickness and weight of 50 flower buds were found to be elite in Tuppamalli pruned in December’12 at 50 cm height from ground level. Maximum flower bud length was recorded in Tuppamalli pruned in January’13 at 25 cm height from ground level. Characters viz., inter nodal length and days to first flower bud initiation after pruning was recorded minimum in Starmalli pruned in January’13 at 75 cm height from ground level. Among all the interaction treatments, Nityamalli pruned in December’12 at 50 cm height from ground level was found to be elite for maximum characters. In experiment (ii) the traits viz., weight of defoliated leaves and total arial biomass per plant was recorded high in Tuppamalli sprayed with 1000 ppm Paraquat dichloride. The days taken for complete defoliation was recorded minimum in the genotype Starmalli sprayed with 2500 ppm paraquat dichloride. The days taken for new leaf emergence after chemical defoliation was recorded minimum in the genotype Nityamalli sprayed with 2000 ppm paraquat dichloride. The highest flower yield per plant was obtained in the genotype Nityamalli sprayed with 1000ppm Paraquat dichloride. Hence, the treatment Paraquat dichloride @1000ppm would be recommended to the farmers. In experiment (iii) the 3rd node cuttings treated with IBA @ 2000 ppm exhibited significant increase in rooting percentage, root length, root number, root fresh weight, maximum sprout diameter, fresh and dry weight of rooted cuttings. The traits viz., number of days taken for sprouting and propagation cycle was recorded minimum in 3rd node cuttings treated with IBA @ 2000 ppm. Whereas 4th node cutting treated with 2000 ppm of IBA and 3rd node cutting treated with 3000 ppm of IBA has obtained more number of sprouts and maximum number of leaves per cutting. Among all the treatment combinations, 3rd node cutting treated with IBA @ 2000 ppm has shown best results regarding maximum traits.
 
Date 2016-07-25T12:46:28Z
2016-07-25T12:46:28Z
2013-10
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69756
 
Language en
 
Format application/pdf
 
Publisher Dr. Y.S.R. HORTICULTURAL UNIVERSITY