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Effect of Variety and Age of Stecklings on Yield and Quality of Carrot Seed

M.A. Malek
Department of Horticulture, Patuakhali Science and Technology University, Patuakhali

M. Sikder
Metal Agro Limited, Salna, Gazipur

D. Mohammed
Public Relations and Publications Section, Bangladesh Agricultural Unversity, Mymensingh

Abstract/ Executive Summary:

An experiment was conducted to study the effect of variety and age of stecklings on quality seed production of carrot. Using three varieties viz. Brasilia Agroflora, Prima Agroflora, New Kuroda and four different age levels of stecklings viz. 65, 72, 79, 86 days of stecklings. The two-factor experiment was laid out in RCBD with three replications. Different variety and age of stecklings showed highly significant influence all most all the parameters studied. The highest seed yield (1329.83 kg/ha) was recorded from Brasilia Agroflora and the quality of seed (germination 81.23% and seed vigour index 10.81) was produced from the same variety, while the lowest seed yield (1292.58 kg/ha) and germination (77.92%) were obtained from New Kuroda. The 72 days age of stecklings was recorded the highest seed yield (1401.21 kg/ha) and the quality of seed (germination 88.42% and seed vigour index 11.13) were produced from the same age, while the lowest seed yield (1231.42 kg/ha) and germination (71.94%) were obtained from 86 days age of stecklings. In case of combined effect, the highest seed yield (1420.63 kg/ha) was obtained from Brasilia Agroflora with 72 days age of stecklings and that of the lowest (1201.60 kg/ha) from New Kuroda with 86 days age of stecklings.

Keywords: Carrot, Variety, Age of stecklings, Yield, Quality seed

Location: Horticulture Farm, Bangladesh Agricultural University, Mymensingh

Start Date: 00-10-2010

End Date: 00-06-2011

Program Area: Seed Technology

Commodity: Carrot

Objectives:

To establish the suitable variety and optimum age of stecklings for maximizing the yield and quality of carrot seed.

Methodology:

The experiment was conducted at Horticulture Farm, Bangladesh Agricultural University, Mymensingh during October, 2010 to June, 2011. The treatments of the experiment consisting of three varieties of carrot viz. Brasilia Agroflora, Prima Agroflora and New Kuroda, and four different age viz. 65, 72, 79 and 86 days of stecklings were used. The unit plot size was 1mx1m. Date of stecklings transplanting: 4 times from 5 December’10 to 1 week interval. Date of harvesting: 10 April to 10 May, 2011. The selected land was medium high and the texture of soil was clay loam. The two-factor experiment was laid out RCBD with three replications. The experimental plot was prepared by good tillage and fertilized with recommended doses of manure and fertilizers. The seeds of varieties were collected from USDA-Alliums project, Department of Horticulture, BAU, Mymensingh. All intercultural operations were done as and when needed. Seeds were sown uniformly in rows. Transplanting was done at 1 October’10 to 1 week interval as per treatment in the main field. The matured umbels were harvested in several installments, when the umbel turned into grayish in colour. Seeds were then collected by hand rubbing, cleaned and dried until they reached safe moisture level (8-10%). After 30 days of storage, the seeds of each treatment were placed for germination test and measure vigour index in petridishes taking 100 seeds for each treatment with blotting papers in the laboratory. The seed vigour was measured through its speed of germination. The germinated seeds were counted every day until germination was completed. An index of the speed of germination was then calculated by adding the quotients of the daily counts divided by the number of days of germination using the formula as below: Seed vigour index = (No. of seed germinated at first count/No. of days required to first count) + …….. + (No. of seed germinated at last count/No. of days to last count). Thus the seeds with higher index has faster germination rate and would be considered to be higher in vigour. Data were recorded on vegetative growth and flowering behavior, umbel characteristics, yield and quality contributing characteristics of carrot from five randomly selected plants of each plot and were analyzed statistically by Mstatc computer programme. The difference between the treatment means was adjudging by least significant difference (LSD) test.

Source of Information: J. Agrofor. Environ. 5 (2): 93-96, 2011; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The maximum seed yield in main and primary umbel (1.13g & 1.02g) was observed in Brasilia Agroflora with 72 days age of stecklings while New Kuroda with 86 days demonstrated the lowest seed yield (0.76g & 0.63g). Brasilia Agroflora with 72 days age of stecklings obtained the highest seed yield/plant and yield/ha (8.91g & 1420.63 kg) whereas it was the lowest (7.26g & 1201.60 kg) in New Kuroda with 86 days. This might be due to higher umbel size, number of flower/umbel, number of seeds/umbel and 1000-seed weight. Maximum 1000-seed weight (1.24g) was recorded in Brasilia Agroflora with 72 days age of stecklings while the New Kuroda with 86 days age of stecklings gave the minimum weight (0.89g). The highest quality of seed (germination 91.19% and vigour index 11.26) was exhibited in Brasilia Agroflora with 72 days age of stecklings, while the lowest (70.79% & 10.43) was observed in New Kuroda variety with 86 days age of stecklings. This might be due to higher 1000-seed weight which enhanced the speed of germination.

Knowledge Management: Journal