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Study of Flowering and Pod Development Pattern in Seed Production of Groundnut Varieties

R. R. Saha
SSO
Agronomy Division, Gazipur

F. Begum
PSO
Agronomy Division, Gazipur

Abstract/ Executive Summary:

The experiment was conducted at the research field of Agronomy Division, BARI, Gazipur during the period January to June 2009 to determine the flowering and pod development pattern as well as effective flowering period for seed production of groundnut varieties. Five groundnut varieties viz. Dhaka 1, BARI Chinabadam 5, BARI chinabadam 6, BARI chinabadam 7, BARI chinabadam 8 were included in this study as treatment variables. Flowering and pod development pattern as well as dry matter accumulation pattern were found to similar among the varieties except BARI chinabadam 5. At the initial stage of flowering of BARI Chinabadam 5 i.e., up to 30 days after flowering both vegetative and reproductive development were found slower and thereafter increased rapidly and it needed more time to mature (154 days) than that of other varieties. Among the varieties, BARI chinabadam 7 produced the significantly highest pod yield (2712 kg/ha) which was statistically similar with that of BARI chinabadam 6 (2449 kg/ha). The results revealed that effective flowering period was up to 30 days after flowering in all the varieties except BARI Chinabadam 5 which needed 10 days more. However, crop maturity period varied with the effective flowering period.

Keywords: Flowering, Pod development pattern, Seed production, Groundnut varieties

Location: Joydebpur, Gazipur

Start Date: 00-01-2009

End Date: 00-06-2009

Program Area: Variety and Species

Commodity: Ground nut

Objectives:

To find out the relationship between synchrony in flowering and pod development
To identify effective flowering period for maximizing seed production of groundnut varieties.

Methodology:

The experiment was conducted at the research field of Agronomy Division, BARI, Gazipur during the period from January to June 2009. Five groundnut varieties Dhaka 1, BARI Chinabadam 5, BARI Chinabadam 6, BARI Chinabadam 7 and BARI Chinabadam 8 were used in the study as experimental materials. The trial was laidout in a RCB design with three replications. Seeds were treated by Vitavax 200 prior to sowing and seeds were sown on 11 January 2009 with 30 cm x 15 cm spacing. The unit plot size was 3 m x 3 m. Fertilizers were applied @ 12-32-43-54-2 kg/ha of NPKSB in the form of urea, triple super phosphate, muriate of potash, gypsum and boric acid as basal. Intercultural operations such as weeding, thinning, mulching, irrigations and pesticide applications were done as per necessity. Flowering start in Dhaka 1, BARI Chinabadam 7 and BARI Chinabadam 8 on 2 March 2008 (50 DAS) and it was on 5 March 2008 (53 DAS) in BARI Chinabadam 5 and BARI Chinabadam 6. At 50% flowering stage, five plants having same day of flowering in each plot were selected and tagged for counting open flower every day. Different groundnut varieties were harvested on different dates such as Dhaka 1, BARI Chinabadam 6 and BARI Chinabadam 8 on 31 May (140 DAS), BARI Chinabadam 7 on 3 June (143 DAS) and BARI Chinabadam 5 on 14 June 2009 (154 DAS). Data were collected on number of flower per plant per day, dry matter distribution in different plant parts, yield and yield components. Collected data were statistically analyzed and means were adjusted by LSD

Source of Information: Annual Report, Agronomy Division 2008-2009, BARI

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget: 15,000/-

Total Budget (Tk.) : 15,000/-

Achievement/Findings:

From this study it is revealed that after starting of flowering, groundnut varieties differed in growth of both vegetative and reproductive development. It is also observed that effective pods were produced from 20 to 30 days after flowering and BARI Chinabadam - 7 was found more productive compared to other varieties.

Knowledge Management: Report/Proceedings