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Research Detail

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M. J. Hussain
Senior Scientific Officer
OFRD, BARI, Sylhet

M. A. Ullah
Scientific Officer
RARS, BARI, Akborpur, Moulvibazar

M. M. R. Salim
Scientific Officer
ARS, BARI, Thakurgoan

M. M. Rahman
Principal Scientific Officer
Soil Science Division, Joydebpur, Gazipur

M. M. R. Sarker
Scientific Officer
OFRD, BARI, Sylhet

Experiments were carried out at Muchaibari, Srimongal under Moulvibazar Multilocation Testing Site, OFRD, Sylhet during two consecutive years of 2005 - 2006 and 2006- 2007 to find out the response of pineapple plants (cv. Giant Kew) to ethrel in early, uniform flowering and off-season production of fruits. Ethrel had significant effect on flower induction and fruit development in pineapple. Ethrel applied in September on 300 days old plants induced flowering 146 days earlier in off-season than those in the control. Hormone (ethrel) treated plot in September showed maximum flowering (84%) followed by ethrel applied in November on 360 days old plants. September treated plants took minimum duration (520 days) while control plots took maximum crop duration (613 days) for ripening. Size of fruit was increased with increasing age of plants at forcing. The highest fruit yield (31275 kg ha-1) was produced by control plots and the lowest from September forcing. Maximum gross margin and benefit-cost ratio were also recorded from September forcing. The result revealed that use of ethrel as growth regulator on 300 day old plants in September could be the effective and profitable for offseason fruiting of pineapple.

  Ethrel, Off-season, Pineapple, Growth regulator, Hormone
  Muchaibari, Srimongal under Moulvibazar Multilocation Testing Site, On-Farm research division, BARI, Sylhet
  00-00-2005
  00-00-2007
  Crop-Soil-Water Management
  Pineapple

To find out the response of pineapple plants (cv. Giant Kew) to ethrel in early, uniform flowering and off-season production of fruits.

The experiment was carried out for two consecutive years of 2005 - 2006 and 2006- 2007 at Muchaibari, Srimongal under Moulvibazar Multilocation Testing Site, On-Farm research division, Bangladesh Agricultural Research Institute, Sylhet with six dispersed replications. Four treatments were as September forcing (5th September), October forcing (5th October), November forcing (5th November) with a control plot on 300, 330 and 360 days after planting of pineapple plants, respectively for each of the year. Plantation was made almost one year before the treatment application according to plant age for each year. Number of treated plants was 100 and control was also 100 for each time of application. The area of each plot was 20 m2. Pineapple plants were grown in line and spacing was 40 cm x 50 cm. Plot to plot distance was 80 cm and paired row system was followed. Variety was Giant kew and slip sucker was used. The spray volume was made with Active ingredients of ethrel were 39%. Soil sample of the experimental plots were collected before setting up the trial at 0 - 20 cm depth and analyzed in the laboratory of SRDI, Sylhet. The analytical results of the collected soil are presented. From the above soil analytical results it was found that initial soil status was not so good. Although the phosphorus status was very high but due to high acidity it was fixed and could not be available for plants. This is why phosphorus application was ensured for the cultivation of pineapple. Fertilizer was applied two times at mid-June and 1st week of October as a farmer’s dose @ 55 kg (total) at 1:1:1 N, P, K/1000 plants. Ethrel was applied at 5th September, 5th October and 5th November, 2005 with a control plot per application for the year 2005-2006. Similar application date was maintained for the year 2006-2007. The experiment was carried out followed by randomized complete block design (RCBD). Weeding and other intercultural operations were done uniformly for all the plots at 120 DAT and just before the top dress of urea and TSP in the crop management for better crop growth during the study. Furthermore, weeding was done as and when necessary. Fifty millimeters of the ethrel (39% a.i.) solution was applied /poured at the heart of each plant in the morning at 7.00 to 9.00. Date of flowering, earliness and duration, flowering percentage, fruit yield and fruit related characters were recorded from all plants under the treatments. The data collected were analyzed statistically using computer package MSTATC. Percent data were transformed as necessary for statistical analysis. The mean differences were separated by DMRT for interpretation at 5% level of significance.

  Int. J. Sustain. Crop Prod. 3(6):68-71, 2008
  
Funding Source:
1.  Government Budget:  
  

Although the yield and number of fruits were lower than the control plot, but use of ethrel as growth regulator in pineapple is an effective measure to induce flowering for off-season fruiting. The results revealed that September forcing would be the most effective in terms of off-season fruit yield and economics at Srimongal area under AEZ-29.

  Journal
  


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