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Effect of Foliar Application of Ga3 and Plant Ages on Yield and Quality of Carrot Seed

MI Hossain*
Senior Scientific Officer,
Sylhet Agricultural University, Sylhet-3100, Bangladesh

M M Hossain
Department of Horticulture, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh

J Ferdousi
Department of Horticulture, Sylhet Agricultural University, Sylhet-3100, Bangladesh

M M Haque
Senior Scientific Officer
Sylhet Agricultural University, Sylhet-3100, Bangladesh

Abstract/ Executive Summary:

A field study was conducted to investigate the effect of foliar application of GA3 and plant ages on yield and quality of carrot seed. Three different plant ages (20, 30 and 40 days) and four concentrations of GA3 (0, 100, 200, 300 ppm) were considered as treatments in the study. The design of the experiment was two factorial Randomized Complete Block Design with three replications where three different plant ages (20, 30 and 40 days) were comprised as factor-A and four different GA3 concentrations (0, 100, 200, 300 ppm) were considered as factor-B. Results showed that plant age of 30 days was found to produce highest seed yield (1152 kgha^-1) followed by 1051 kgha^-1 from 40 days plant age while the lowest seed yield (916.6 kgha^-1) was harvested from 20 days plant age. On the other hand, the highest seed yield (1849 kgha^-1.) was obtained from foliar application with 200 ppm GA3followed by 300 ppm GA3 (1267 kgha^-1.). The lowest seed yield (106.2 kgha^-1.) was obtained from the control treatment (no application of GA3).The highest yield was obtained (2120 kgha^-1) from the plots having effect of 30 days plant age with 200 ppm of GA3 application. It was statistically/interaction similar to those plots (1924 kgha^-1) of 40 days plant age combined with 200 ppm GA3 application. The lowest seed yield (102.1 kgha^-1) was harvested from the plots of 20 days plant age without GA3 treatment. The study revealed that 30 days plant age with foliar application of GA3 at 200 ppm produced the best quality and the highest seed yield (2.12 t ha^-1) in the tropical carrot variety Bejo shetal.

Keywords: Carrot, GA3 application, Seed yield, Quality.

Location: Horticultural Research Farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur

Start Date: 30-10-2007

End Date: 05-05-2008

Program Area: Seed Technology

Commodity: Carrot

Objectives:

The present study was therefore, undertaken to find out the appropriate GA3 conc. which influences the yield and quality of carrot seed and to know the proper age of plant for GA3 application.

Methodology:

The experiment was conducted at the Horticultural Research Farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during the period from 30 October 2007 to 5 May 2008. The land was well prepared with the tractor followed by harrowing and laddering for a good tilth. All weeds and stubbles were removed during land preparation. The plots were prepared, drains were made around each plot and the excavated soil was used for raising the plots about 10 cm high. Ridges were made around each plot to restrict the lateral run off of irrigation water. The variety “Bejoshetal” of India was the planting material used for the study. This variety was selected on the basis of performance of previous findings. The two-factor experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. The whole experimental area was divided into three blocks, representing three replications. The three different plant ages (20, 30 and 40 days) was comprised as factor-A and four different concentrations of GA3 (0, 100, 200 and 300 ppm) were considered as factor-B. The plots were raised by 19 cm from the ground level. The sowing was done on 30 October to 1^st week of November. Seed rate of carrot was 700-1250 gm ha^-1. The unit plot size was 2.0×1.0 m having row to row and plant to plant spacing of 25 cm and 40 cm, respectively. The unit plot and blocks were separated by 0.75 cm and 0.75 cm space, respectively. The desired concentrations of gibberellic acid were foliar sprayed on the plants at 20, 30 and 40 days of plant age. The solution was sprayed on the plants with the help of hand sprayer. During the experimental period normal cultivation procedures such as manure and fertilizer application, mulching, weeding, irrigation and others application were followed. Generally the seeds were harvested when green umbel turned to brownish or straw color. When the maturity of the seed was completed then the matured umbels were harvested in a brown paper bag. The harvested umbels with bags were then sun dried for better threshing and cleaning. The data were recorded on individual plant basis from the selected plants in respect of the following characters. Thousand seed weight (g), seed yield plant^-¹ (g), seed yield hectare^-1 (kg), percent germination, Co-efficient of germination (%): Faster germination determinate the better success of seedling establishment under field condition. According to Copland (1976), the co-efficient of germination may be estimated using the formula.

Source of Information: J. SylhetAgril. Univ. 2(2):171-178, 2015 ISSN: 2308-1597

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present results concluded that, the best quality and the highest seed yield was obtained (2.12 t ha^-1) from the combined effect of 30 days plant age with foliar sprayed 200 ppm of GA3 application in the tropical carrot variety, Bijo Shetal.

Knowledge Management: Journal