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Research Detail

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P.C. Golder
PSO (Planning and Evaluation),
BARC, Farmgate, Dhaka-1215, Bangladesh

M.M. Hossain
Professor
Dept. of Horticulture, BSMRAU, Gazipur-1703, Bangladesh

A.K.M.A. Hossain
Former Director
HRC, BARI, Gazipur-1701, Bangladesh

Two types of growth regulators namely, NAA (50, 100 and 150 ppm) and ethrel (100, 200 and 300 ppm) were sprayed soon after the completion of fruit set. Both NAA and ethrel significantly increased the yield compared to control. Number of hands and fingers did not differ significantly but these growth regulators increased the fruit size and weight. Ethrel also remarkably reduced the days to maturity. The pulp to peel ratio of fruits at ripening differed significantly but ethrel was more effective in increasing the pulp to peel ratio than NAA. Per cent dry matter, TSS, total sugar, reducing sugar, non-reducing sugar, titratable acidity and pH content of fruits were not significantly affected by different growth regulator treatments. Application of 100 ppm NAA or 200 ppm ethrel would be advantageous for obtaining attractive fingers and higher yield in banana.

  Post-Folwering, Growth regulator, Fruit development, Yield, Banana
  Department of Horticulture, BSMRAU, Gazipur
  00-05-1997
  00-07-1998
  Crop-Soil-Water Management
  Banana

To find out the effect of different growth regulators on the maturity and bunch characteristics of banana when applied as post- flowering spray on bunches or whole plant.

The study was conducted at the Research Farm of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Salna, Gazipur during May, 1997 to July, 1998. The soil was having texture of sandy clay loam containing 0.95% organic matter, 0.05% total nitrogen, 26.00 µg/g of total phosphorus, 0.30 µg/g of exchangeable potassium, 53.00 µg /g of iron and 5.00 µg/g of zinc. The experiment was laid out in randomized complete block design with seven treatments and three replications. The treatments were as T1= Control (without growth regulators), T2 = NAA 50 ppm, T3 = NAA 100 ppm, T4 = NAA 150 ppm, T5 = Ethrel 100 ppm, T6 = Ethrel 200 ppm and T7 = Ethrel 300 ppm. Uniform sword suckers (1000 ± 100 g) of banana cv. Amritasagar were planted on 15 May, 1997 in pits having 60 cm diameter and 60 cm deep at a spacing of 2x2 m. The crop was fertilized with 20 kg cowdung, 260 g urea, 240 g triple super phosphate and 240 g muriate of potash per plant. Entire quantity of cowdung, triple superphosphate and half of muriate of potash were applied in pit one week after digging. Top dressing of urea was done at 2 months interval and continued up to flowering. The remaining half of potash was applied at flowering. Irrigation was given at 20 days interval during dry months and intercultural operations like desuckering, weeding, staking, etc. were done as required. The growth regulators were applied just after the appearance of the last hand i.e., soon after completion of fruit setting, by spraying the whole bunch with a hand sprayer. A few drops (3-4 drops/litre solution) of Tween-20 were added to spray solution as a sticker. Observations were recorded on time required from emergence of inflorescence to maturity, bunch weight, number and weight of hands and fingers, fruit length and girth, pulp to peel ratio, percent dry matter. total soluble solids (TSS), total sugar, reducing sugar, non- reducing sugar, titratable acidity and pH content of fruits. Total sugars and titratable acids were estimated following the procedure and the quantities were expressed as percentage over fresh weight basis. The data of various parameters recorded were analyzed statistically following the methods described by Gomez and Gomez. Analysis of variance (ANOVA) and mean difference were worked out by IRRISTAT.

  Bangladesh Journal of Agriculture, Vol: 31(1&2), pp: 81-87, 2006, ISSN: 0253-5408
  
Funding Source:
1.   Budget:  
  

Based on the  findings, it can be inferred that to get attractive fingers and increased yield in banana either 100 ppm NAA or 200 ppm ethrel would be advantageous and can be commercially adopted.

  Journal
  


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