Metagenomic analysis of bacterial diversity in the rhizosphere of arecanut palms affected by yellowing in Wayanad
By: mahesh Mohan.
Contributor(s): Girija, D (Guide).
Material type:
BookPublisher: Vellanikkara Department of Agricultural Microbiology, College of Horticulture 2017Description: 203p.Subject(s): Agriculture | Agricultural microbiologyDDC classification: 660.62 Online resources: Click here to access online Dissertation note: MSc Abstract: The study entitled “Effect of growth retardants on growth and yield of African marigold (Tagetes erecta L.)” was conducted at College of Agriculture, Padannakkad during 2015-2017 with the objective to assess the response of marigold in terms of growth, yield and carotenoid content as influenced by foliar application of growth retardants Alar and Cycocel. The experiment was laid out in split plot design during two seasons viz., monsoon and pre-monsoon. The data was subjected to statistical analysis to find out the effect of growth retardants on different parameters.
The experimental material comprised of Pusa Narangi Gainda and Maxima Yellow F1 varieties of African marigold and their response to growth retardants was evaluated with treatments viz., C1 : Alar 500 ppm, C2 : Alar 1000 ppm, C3 : Alar 1500 ppm, C4 : Cycocel 1000 ppm, C5 : Cycocel 1500 ppm, C6 : Cycocel 2000 ppm and C7 : Water spray (control). The analysis of data regarding different plant characters revealed that the varieties and growth retardants resulted in significant differences with vegetative, floral and yield characters and pigment contents in flowers.
Growth retardants significantly influenced plant height, plant spread, number of branches, internodal length, and stem girth, number of flowers, flower yield and carotenoid content. There was no significant difference noticed on days to first flowering, days to 50 % flowering, flower length, pedicel length, flower diameter and flower weight. The effects of growth retardants on leaf area, SCMR, total biomass, crop duration, flowering duration and post-harvest longevity varied with seasons.
On comparing the two varieties during two seasons, Maxima Yellow F1 performed better for most of the growth and floral characters and recorded highest flower yield in monsoon season. From economic point of view, Maxima Yellow F1 can be recommended during monsoon season in Kerala to meet the high demand of flowers during Onam. Among the growth retardants, Cycocel 1000 ppm can be recommended for better growth, higher yield and carotenoid content in Pusa Narangi Gainda and Maxima Yellow F1 varieties of African marigold during monsoon season and pre-monsoon seasons.
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
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Theses
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KAU Central Library, Thrissur Theses | Reference Book | 660.62 MAH/ME (Browse shelf) | Not For Loan | 174245 |
MSc
The study entitled “Effect of growth retardants on growth and yield of African marigold (Tagetes erecta L.)” was conducted at College of Agriculture, Padannakkad during 2015-2017 with the objective to assess the response of marigold in terms of growth, yield and carotenoid content as influenced by foliar application of growth retardants Alar and Cycocel. The experiment was laid out in split plot design during two seasons viz., monsoon and pre-monsoon. The data was subjected to statistical analysis to find out the effect of growth retardants on different parameters.
The experimental material comprised of Pusa Narangi Gainda and Maxima Yellow F1 varieties of African marigold and their response to growth retardants was evaluated with treatments viz., C1 : Alar 500 ppm, C2 : Alar 1000 ppm, C3 : Alar 1500 ppm, C4 : Cycocel 1000 ppm, C5 : Cycocel 1500 ppm, C6 : Cycocel 2000 ppm and C7 : Water spray (control). The analysis of data regarding different plant characters revealed that the varieties and growth retardants resulted in significant differences with vegetative, floral and yield characters and pigment contents in flowers.
Growth retardants significantly influenced plant height, plant spread, number of branches, internodal length, and stem girth, number of flowers, flower yield and carotenoid content. There was no significant difference noticed on days to first flowering, days to 50 % flowering, flower length, pedicel length, flower diameter and flower weight. The effects of growth retardants on leaf area, SCMR, total biomass, crop duration, flowering duration and post-harvest longevity varied with seasons.
On comparing the two varieties during two seasons, Maxima Yellow F1 performed better for most of the growth and floral characters and recorded highest flower yield in monsoon season. From economic point of view, Maxima Yellow F1 can be recommended during monsoon season in Kerala to meet the high demand of flowers during Onam. Among the growth retardants, Cycocel 1000 ppm can be recommended for better growth, higher yield and carotenoid content in Pusa Narangi Gainda and Maxima Yellow F1 varieties of African marigold during monsoon season and pre-monsoon seasons.
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