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Indian Journal of Natural Products and Resources (IJNPR)
[Formerly Natural Product Radiance (NPR)] >
NPR Vol.6 [2007] >
NPR Vol.6(4) [July-August 2007] >
| Title: | Flowering performance of Polianthes tuberosa Linn. cv. ‘Calcutta Double’ as influenced by thermal regime |
| Authors: | Khan, Arpita
Saha, Abhijit
Pal, P |
| Keywords: | Tuberose
Polianthes tuberosa
Tuberose cv. ‘Calcutta Double’
Air temperature
Flowering performance
Performance indicators |
| Issue Date: | Aug-2007 |
| Publisher: | CSIR |
| IPC Code: | Int. cl.8 — A01G 9/00 |
| Abstract: | In order to study the role of climatic parameters on different performance
indicators of tuberose, Polianthes tuberosa Linn. (Double type),
an experiment was carried out at Horticulture Research Farm, Bidhan Chandra
Krishi Viswavidyalaya (BCKV), Mohanpur, District Nadia (West Bengal) during
2002. The crop was planted on 28th March 2002 with standard cultural
practices. Dates corresponding to emergence (E), appearance of first (FFO) as
well as last floret (LFO) corresponding to each tagged spike (27th
October to 29th December 2002) were noted. Maximum and minimum
temperature regime enjoyed by each spike during E-FFO and FFO-LFO stage were
utilized to derive different thermal indices to study the rate of phenological
development as well as status of different performance indicators. Correlation
studies showed that all the thermal indices pertaining to E-FFO stage and CHU
(Cumulative heat units) during FFO-LFO stage were highly associated with
different performance indicators. Regression studies showed that value of these
indices during E-FFO stage could explain 55-82% variability of different
indicators. Rate of reproductive development during E-FFO has been found to be a
quadratic function of mean temperature (R2=0.74) where
21-22oC mean air temperature showed maximum rate. Relationship
developed in this study can be useful for predicting the performance of tuberose
ahead of the harvest and assessing its worthiness in the market. A mean air
temperature around 22oC during E-FFO is useful in early harvesting as
well as obtaining higher rachis length and thereby the market value of this
crop. |
| Page(s): | 322-326 |
| ISSN: | 0975-1092 (Online); 0972-592X (Print) |
| Source: | NPR Vol.6(4) [July-August 2007]
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