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Research Detail

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M M H Sarker*
Department of Soil Science, Sylhet Agricultural University, Sylhet, Bangladesh

M Jahiruddin
Department of Soil Science, Bangladesh Agricultural University, Mymensingh, Bangladesh

A Z M Moslehuddin
Department of Soil Science, Bangladesh Agricultural University, Mymensingh, Bangladesh

M R Islam
Department of Soil Science, Bangladesh Agricultural University, Mymensingh, Bangladesh

There was an attempt of searching out of deficient micronutrient for okra in the Old Meghna Estuarine Floodplain (AEZ 19). The study was conducted in Chandina upazila of Comilla district covering AEZ 19. The experiment was laid out in a Randomized Complete Block Design with 3 (three) replications at farmers’ field during 2011-2012. In this study 7 (seven) treatment combinations including a control were tested and the treatments were designed taking all essential micronutrients except Cl following additive element trial technique. The rates of micronutrients were 3 kg Zn, 2 kg B, 2 kg Cu, 3 kg Mn, 5 kg Fe and 1 kg Mo ha-1. Sole application of Zn along with recommended doses of N, P, K and S was found sufficient for the highest yield of pod and stover, pod length and pod diameter whereas pod yield plant-1and average pod weight were showed the highest responses by the combine application of Zn and B. Although, the highest yield of pod and stover (11.23 and 3.21 t ha-1, respectively) was produced from T7treatment, there was observed no additive effect due to the application of micronutrients other than Zn and B. Almost similar trend was observed in other growth and yield parameters, and uptake of different nutrient elements. 

  AEZ 19, Okra, Micronutrients
  Bokshir Pool village under Chandina upazila of Comilla district
  10-05-2011
  05-10-2011
  Crop-Soil-Water Management
  Micronutrient, Okra

The present study was undertaken to evaluate the effect of micronutrient application on the growth and yield parameters of okra in the soils of AEZ 19.

The experiment was carried out in the soils of AEZ 19 at farmer’s field in Bokshir Pool village under Chandina upazila of Comilla district during 10 May to 5 October 2011. The soil of the experimental field belongs to Chandina soil series under Non-Calcareous Dark Grey Floodplain Soil type. The variety of okra used in the study was Shorosh (hybrid). The initial concentrations of Zn,B, Cu, Mn and Fe in soils of experimental plot were 0.82, 0.26, 2.49, 37.0 and 5.08 mg kg-1, respectively. Treatments: There were six micronutrient containing fertilizer treatments and one control treatment in the experiment. The treatments were designed taking all micronutrients except Cl following additive element trial technique. The treatments were Control (T1), Zn (T2), Zn+B (T3), Zn+B+Cu (T4), Zn+B+Cu+Mn (T5), Zn+B+Cu+Mn+Fe (T6) and Zn+B+Cu+Mn+Fe+Mo (T7). The rates of micronutrients were 3 kg Zn, 2 kg B, 2 kg Cu, 3 kg Mn, 5 kg Fe and 1 kg Mo ha-1. The elements (Zn, B, Cu, Mn, Fe and Mo were added as ZnSO4.7H2O, H3BO3, CuSO4. 5H2O, MnCl2, FeSO4. 7H2O and Na2MoO4, respectively. Other nutrients (macronutrients) were used according to Fertilizer Recommendation Guide (BARC, 2005) for all plots and the doses were 100, 30, 60 and 10 kg ha-1for N, P, K and S, respectively. Experimental design and layout: The experiment was laid out in a randomized complete block design with three replications, each plot measuring 4m ×5m. The treatments were randomly distributed to the plots in each block. The plots were surrounded by 40cm wide and 10cm high earthen bunds. One meter wide and 10cm deep irrigation channel was made in-between two blocks. The layout of the experiment was done in accordance with the statistical design.Seed sowing and intercultural operations: Okra seeds were sown in 15 May 2011 maintaining 50cm×40cm spacing. Irrigation, weeding and plant protection measures (e.g., pesticide application) were done as and when necessary.Data collection:The okra fruits (pod) were harvested when they attained at edible stage. Six square meter area in each plot was selected to harvest pod and stover. The weights of pod were taken just after harvest. Harvesting of edible pods was done in 25 June 2011 for the first time and it was continued in every alternate day up to 5 October 2011. The stover yield was expressed on sundry basis. Data on the growth and yield contributing characters were recorded from 10 randomly selected plants from outside the harvested area within a plot, as described by Gomez and Gomez (1984). The growth and yield components on which data recorded were plant height (cm), pod yield plant-1, edible pods plant-1, average pod weight (g), pod length (cm), pod diameter (cm), pod yield (t ha-1) and stover yield (t ha-1).Collection and preparation of plant samples for chemical analysis: Plant samples (pod and stover) were collected at the time of harvesting. The stover samples were air dried immediately after collection and the dry samples were chopped off into smaller pieces. The collected plant samples were then oven dried at 65°C for 24 hours. To obtain homogenous powder, the samples were finely ground by using a grinding-mill to pass through a 60-mesh sieve. The samples were stored in desiccators for determination of N, P, K, S, Zn and B contents.Chemical analysis of plant samples: The processed plant samples were chemically analyzed for determination of N, P, K, S, Zn and B concentrations following standard methods. Nutrient uptake was calculated from the yield and nutrient concentration data using the following formulae- For N, P, K and S: Nutrient uptake (kg ha-1) = Nutrient concentration in plant sample (%) ×Yield (kg ha-1)/100. For Zn and B: Nutrient uptake (g ha-1) = Nutrient concentration in plant sample (μg g-1) ×Yield (kg ha-1)/1000. Data analysis: The collected data were compiled and tabulated in proper form which was subjected to statistical analyses following standard methodology and the mean differences were adjudged by Duncan’s Multiple Range Test (Gomez and Gomez, 1984).

  J. SylhetAgril. Univ. 2(2):189-193, 2015 ISSN: 2308-1597
  
Funding Source:
1.   Budget:  
  

The highest yield of pod and stover (11.23 and 3.21 t ha-1, respectively) was produced from T7 treatment, there was observed no additive effect due to the application of micronutrients other than Zn and B. Almost similar trend was observed in other growth and yield parameters, and uptake of different nutrient elements. 

  Journal
  


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