Regulation of Growth and Flowering in Tuberose polianthes tuberosa Linn
By: Muralee Manohar M.
Contributor(s): Sobhana A (Guide).
Material type:
BookPublisher: Vellanikkara Department of Pomology and Floriulture , College of Horticulture, 2000DDC classification: 634.1 Online resources: Click here to access online Dissertation note: MSc Abstract: A study was undertaken at the College of Horticulture, Kerala
Agricultural University, Vellanikkara, Thrissur to determine the effect of
nutrients and bioregulators on the growth and flowering of tuberose.
The treatments in general, significantly influenced all the vegetative
characters, duration, most of the spike characters and yield of bulbs and
bulblets in one season or the other.
Both nitrogen at 30 g m-2 as well as GA3 at 50 and 100 ppm gave
maximum plant height in both the seasons. Nitrogen 20 g m-2 and GA3 100 ppm
produced maximum number of leaves, followed by ethrel 50 ppm. In number of
tillers, nitrogen 30 g m-2 caused a significant increase.
Increasing rate of applied nitrogen and GA3 at 100 ppm reduced the
days required for the emergence of spike. The effect of GA3 50 ppm and !AA
25 ppm were also found to be significantly superior.
Nitrogen 20 and 30 g m" as well as GA3 50 and 100 ppm were
superior in increasing the spike length. The longest rachis was obtained with
nitrogen at 30 g m-2 and GA3 50 ppm.
Among the nutrients, nitrogen and among bioregulators GA3 100
ppm increased the number of florets per spike and the longevity of individual
floret on a spike. However, the longevity of the spike in the field was not
affected significantly by the treatments.
The total crop duration was found to be reduced by nitrogen
application, GA3 50 ppm and !AA 25 ppm.
Among the bioregulators GA3 50 ppm and among nutrients nitrogen
at 20 and 30 g m-2 recorded the maximum fresh weight of spike.
Control plot plants took maximum days in vase for opening of each
floret, while GA3 100 ppm took minimum days. Higher doses of nitrogen were
found to increase the number of days for floret opening. Days for complete
opening of florets in vase were shortest and the number of florets opening at a
time was the maximum with GA3 100 ppm.
Higher doses of nitrogen as well as !AA 25 ppm were able to
enhance the vase life, followed by GA3 50 and GA3 100 ppm.
Nitrogen and phosphorus at 20 g m? and 15 g m" respectively were
responsible for increased weight of bulbs and bulblets per hill. Bioregulators
did not influence this character significantly.
Nitrogen and potassium content of the leaves increased with
increasing levels of respective fertilizers, but application of phosphorus did not
influence the leaf phosphorus content.
| Item type | Current location | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|
Theses
|
KAU Central Library, Thrissur Theses | 634.1 MUR/RE (Browse shelf) | Available | 171547 |
MSc
A study was undertaken at the College of Horticulture, Kerala
Agricultural University, Vellanikkara, Thrissur to determine the effect of
nutrients and bioregulators on the growth and flowering of tuberose.
The treatments in general, significantly influenced all the vegetative
characters, duration, most of the spike characters and yield of bulbs and
bulblets in one season or the other.
Both nitrogen at 30 g m-2 as well as GA3 at 50 and 100 ppm gave
maximum plant height in both the seasons. Nitrogen 20 g m-2 and GA3 100 ppm
produced maximum number of leaves, followed by ethrel 50 ppm. In number of
tillers, nitrogen 30 g m-2 caused a significant increase.
Increasing rate of applied nitrogen and GA3 at 100 ppm reduced the
days required for the emergence of spike. The effect of GA3 50 ppm and !AA
25 ppm were also found to be significantly superior.
Nitrogen 20 and 30 g m" as well as GA3 50 and 100 ppm were
superior in increasing the spike length. The longest rachis was obtained with
nitrogen at 30 g m-2 and GA3 50 ppm.
Among the nutrients, nitrogen and among bioregulators GA3 100
ppm increased the number of florets per spike and the longevity of individual
floret on a spike. However, the longevity of the spike in the field was not
affected significantly by the treatments.
The total crop duration was found to be reduced by nitrogen
application, GA3 50 ppm and !AA 25 ppm.
Among the bioregulators GA3 50 ppm and among nutrients nitrogen
at 20 and 30 g m-2 recorded the maximum fresh weight of spike.
Control plot plants took maximum days in vase for opening of each
floret, while GA3 100 ppm took minimum days. Higher doses of nitrogen were
found to increase the number of days for floret opening. Days for complete
opening of florets in vase were shortest and the number of florets opening at a
time was the maximum with GA3 100 ppm.
Higher doses of nitrogen as well as !AA 25 ppm were able to
enhance the vase life, followed by GA3 50 and GA3 100 ppm.
Nitrogen and phosphorus at 20 g m? and 15 g m" respectively were
responsible for increased weight of bulbs and bulblets per hill. Bioregulators
did not influence this character significantly.
Nitrogen and potassium content of the leaves increased with
increasing levels of respective fertilizers, but application of phosphorus did not
influence the leaf phosphorus content.
There are no comments for this item.