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Research Detail

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Md. Shafiqul Islam
Senior Scientific Officer
OFRD, BARI, Barind, Rajshahi

The experiment was carried out in the FSRD site, Kadamshahar, Godagari, Rajshahi during the year of 2007-08 and 2008-09 to investigate the effects of bulb size and planting date on the yield and quality of onion seeds of BARI Peaj-2. The trial was laid out with three bulb size (5±2g, 10±2g and 15±2g) and three planting date (20 Oct., 05 Nov. and 20 Nov.). Bulb size and planting date had significant effect on the yield and quality of onion seed. Significantly higher seed yield (558.42 t ha-1) and the lower seed yield (499.23 t ha-1) were obtained when bulbs were planted on 20 November and 20 October, respectively. Significantly higher seed yield (551.07 kg ha-1) was produced by using large bulb (15±2g) that is identical to medium bulb (10±2g) and the lowest seed yield (521.46 kg ha-1) obtained by using small bulb (5±2g). The interaction effect of planting date and bulb size did not vary significantly, but their combined effects were significant except 1000 seed weight. The maximum seed yield (596.67 kg ha-1) was obtained by using large bulb (15±2g) planted on 20 November and lower seed yield (463.83 t ha-1) was found from small bulb (5±2g) planted on 20 October.

  Summer onion, planting date, bulb size, seed yield, Onion
  FSRD site, Kadamshahar, Godagari, Rajshahi
  06-11-2007
  10-04-2009
  Crop-Soil-Water Management
  Onion

To find out the optimum planting time and bulb size to grow good quality onion seeds

The experiment was conducted at FSRD site, Kadamshahar, Godagari, Rajshahi during the year of 2007-08 and 2008-09 to find out the optimum planting date and bulb size to produce good quality seeds of summer onion in the High Barind Tract. The soil belongs to Amnura series under AEZ 26 and composed of silty clay loam in texture with having a pH value of5.8. The treatments comprised three bulb size of onion (5±2g, 10±2g and 15±2g) and three planting date (20 October, 05 November and 20 November). Onion variety BARI Peaj-2 was used in the study. The bulbs were transplanted at the spacing of 25 cm x 20 cm. The crop was harvested at maturity on 20 March to 10 April 2009. Observations were made on yield components from 10 randomly selected plants per plot. Yield data was taken as plot wise and thereafter converted into kg ha-1. The data were analyzed statistically.

  Annual Research Report, 2007-08 and 2008-09 published by OFRD, BARI
  
Funding Source:
1.  Government Budget:  
  

 Effect of planting date (2008-09) Significant variation was observed in seed yield and yield attributes of onion among planting dates except 1000 seed weight. Taller plant (71.98 cm) was obtained when seed bulb planted on 20 Nov. which was identical with planting date on 05 Nov. (69.75 cm) and smallest plant was produced on 20 October planting.Maximum number of seeded umbel-1 (309.67) and higher seed weight umbel-1 (2.70 g) were obtained when bulb was planted on 20 Nov. producing higher seed yield (558.42 kg ha-1). Lowest seed yield (499.23 kg ha-1) was produced from 20 October planting. II. Effect of bulb size (2008-09) Large bulb was produced from the highest number seeded umbel-1 (334.22) followed by small bulb (322.33) and the lowest number seeded umbel-1 (287.56) obtained by using medium bulb. The highest amount of seed umbel-1 (2.58 g) was found from large bulb followed by medium size (2.43 g) that was identical to small bulb size (2.16 g). Large bulb size was produced from the large size umbel (6.62cm) followed by small bulb (5.80cm) that was identical to medium bulb (5.09cm). Higher seed yield (551.07 kg ha-1) was produced by using large bulb which was identical to medium bulb (530.73 kg ha-1) and the lowest seed yield (521.46 kg ha-1) obtained by using small bulb. III. Interaction effect of planting date and bulb size (2008-09) The maximum seed yield (596.67 kg ha-1) was obtained by using large bulb (15±2g) planted on 20 November. This might be due to the cumulative effect of highest number of seed umbel-1 (366), the highest seed weight umbel-1 (2.96 g), large size umbel diameter (7.19 cm) and the highest 1000 weight (2.88g).Lower seed yield (463.83 kg ha-1) was obtained from small bulb (5±2g) planted on 20 October. Similarly maximum seed yield also obtained from large bulb size (15±2g) and planted on 21 Nov. during the year of 2007-08.

  Report/Proceedings
  


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