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Effect of Time of Corm Lifting on Gladiolus Production

F. N. Khan
Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

M. S. Mollah
Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

R. Ara
Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

M. M. U. Amin
Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

P. C. Golder
Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

Effects of seven different corm lifting dates viz. 30, 45, 60, 75, 90, 105 and 120 days after flowering (DAF) were investigated to determine the optimum time of corm lifting in gladiolus. Different treatments had no significant effect on the number of corms and cormels per plant but individual corm weight, diameter of corm and weight of cormels per plant were significantly influenced by different treatments. These parameters were found to increase with increase in lifting dates except the treatment 120 DAF in case of weight of cormels per plant. When the corms were stored at normal room temperature, different treatments showed insignificant variation in the incidence of corm rot disease. Corms lifted at 30 DAF though showed higher percentage of weight loss and less reduction in diameter during storage, it did not differ significantly with other treatments in the productivity of gladiolus when planted in the following year.

Keywords: Gladiolus, Corm, Lifting and production, Corm lifting, Cormels

Location: Horticultural Research Centre, BARI, Gazipur

Start Date: 00-00-1998

End Date: 00-00-2001

Program Area: Crop-Soil-Water Management

Commodity: Gladiolus

Objectives:

To determine the optimum time of corm lifting in gladiolus.

Methodology:

The experiment was carried out at the central research farm of the Horticultural Research Centre, BARI, Gazipur during 1998-2001. Seven different times of corm lifting viz. 30, 45, 60, 75, 90, 105 and 120 days after flowering (DAF) were studied as treatments in the experiment. The experiment was replicated four times in RCB design. Uniform sized corms (3.5-4.0 cm dia.) were planted at a depth of 6 cm. The unit plot size was 1 x 0.9 m² and spacing was maintained at 25 cm from row to row and 1 5 cm from plant to plant. The experimental land was prepared with deep ploughing and fertilized at the rate of 30 tons, 150, 225 and 130 kg of cowdung (CD). urea. triple super phosphate (TSP) and muriate of potash (MP) per hectare, respectively. Cowdung, TSP and MP were applied as basal and urea was top-dressed in two equal splits at 4-leaf stage and spike initiation stage. The corms of commonly cultivated red variety (GL-013) were planted on 26/10/1998 and 12/11/1999. The flowering stage was adjusted when basal floret of the spike shows color. Corms and cormels were lifted as per treatments during February 17 to May 18 in 1999 and March 6 to June 4 in 2000. Soon after lifting, corms were properly cleaned. These were then bagged in perforated nylon bag and stored in normal room condition. Corms harvested earlier got longer storing period whereas shorter storing period was required in late harvested corms. The observations on the loss of weight and diameter of corms were recorded for 180 days intervals for each treatment. The stored corms were then planted on November 19, 1999 and November 15, 2000 to observe their productivity. The corms were then harvested 90 days after flowering.

Source of Information: Pakistan Journal of Biological Sciences 5 (9): 903-905, 2002 © Asian Network for Scientific Information 2002

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

From the present study, it was observed that there was no significant variation in the productivity of stored corms lifted in different dates. Thus, corms can be harvested earlier i.e. 30 days after flowering without affecting its productivity. In overview of the results, the treatment 30 DAF may be considered as the optimum harvesting time of gladiolus in Bangladesh condition.

Knowledge Management: Journal