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Research Detail

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J. Ferdous
Institute of Seed Technology, Sher-e-Bangla Agricultural University Dhaka-1207, Bangladesh

T.S. Roy
Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

R. Chakraborty
Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

M. Mostofa*
Institute of Seed Technology, Sher-e-Bangla Agricultural University Dhaka-1207, Bangladesh

R. Noor
Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

F. Nowroz
Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

B.C. Kundu
Bangladesh Agricultural Research Institute, Tuber Crops Research Centre Gazipur-1701, Bangladesh

The effect of vermicompost on dry matter and the specific gravity of potato tubers under ambient storage conditions was studied. Vermicompost was used at four rates viz. 0, 2, 4 and 6 t ha-1 over the four varieties of potato viz. BARI TPS-1, BARI Alu-28 (Lady Rosetta), BARI Alu-25 (Asterix) and BARI Alu-29 (Courage). Results demonstrated that processing parameters such as dry matter percentage (%) and specific gravity increased with increasing vermicompost levels while they decreased with the increasing storing period. Lady Rosetta and Asterix potato varieties can be safely stored at normal room temperature up to 60 days. There was no interaction between vermicompost rates and crop varieties. Hence, the potato growers of Bangladesh can use vermicompost at 6 t ha-1 for achieving a better yield without affecting processing quality.

  Dry matter, Potato, Specific gravity, Vermicompost
  Agronomy Research Field of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh
  01-11-2016
  30-04-2017
  Crop-Soil-Water Management
  Potato, Vermicompost and vermiculture

Sometimes potato produced in Bangladesh is not good quality enough in respect of dry matter and specific gravity which are not present at optimum level in produced products (Keijbets, 2008). So, using different amounts of vermicompost materials may contribute for improving the quality of potatoes in Bangladesh’s condition. The objective of this experiment was to find out the influence of vermicompost as soil supplement on the processing quality of potato during ambient storage conditions.

Research Location The research was conducted at the Agronomy Research Field of Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh during the period from November 1, 2016, to April 30, 2017. Topsoil was silty clay in texture, olive-gray with common fine to medium distinct dark yellowish-brown mottles. Soil pH was 5.6 and had organic carbon 0.45%. The selected plot was medium-high land. Plenty of sunshine and moderately low temperature prevails during the experimental period, which is suitable for potato growing in Bangladesh. 

Experimental Design The experiment consisted of two factors. Factor A: Potato varieties (V1-4) - V1: BARI TPS-1, V2:BARI Alu-28 (Lady Rosetta), V3: BARI Alu-25 (Asterix), V4:BARI Alu29 (Courage); Factor B: Vermicompost levels (M1-4) - M1: 0 t ha-1 (control), M2: 2 t ha-1 , M3: 4 t ha-1 , M4: 6 t ha-1 . The experiment was provoked in a split-plot design with three replications. The variety was assigned to the main plot and vermicompost to the subplot. The distance between row to row was 50 cm, plant to plant was 25 cm and plot to plot was 75 cm. The size of the unit plot was 2 m × 2.5 m.

Crop Management Collected all varieties of seed potatoes were certified seed and the individual weight of seed potato was 60-70 g. The experimental soil was fertilized with Urea (250 kg ha-1), Triple Super Phosphate (150 kg ha-1), Muriate of Potash (250 kg ha-1), Gypsum (120 kg ha-1), Zinc Sulphate (10 kg ha-1) and Boric Acid (10 kg ha-1) as recommended by Mondal et al., (2011). The total amount of vermicompost was applied at 7 days before planting as per treatment. The well sprouted healthy and uniform sized potato tubers were planted according to 4-5 cm depth in soil. Different intercultural operations such as irrigation, weeding, mulching, earthing up and plant protection measures were done as per when needed. Haulm cutting was done at 85 DAP, when 40-50% of plants showed senescence and the tops started drying. After haulm cutting the tubers were kept under the soil for 10 days for skin hardening. The potatoes of each plot were separately harvested, bagged and tagged and brought to the laboratory.

Recording of Data The following data were collected during the experiment from the laboratory where the potatoes were stored with a good ventilation facility. Dry Matter Content (%) The samples of tuber were collected from each treatment. After peeling off the tubers the samples were dried in an oven at 72°C for 72 hours. Dry matter content was calculated as the ratio between dry and fresh weight and expressed as a percentage (Barton, 1989). 

Specific Gravity (g cm-3 ) It was measured by using the following formula –

Specific gravity = Weight of tuber in air (g) / Weight of tuber in air - Weight of tuber in fresh water at 4°C

Statistical Data Analysis The data obtained for different characters were statistically analyzed following the analysis of variance (ANOVA) techniques by using Statistix 10 (2013) computer package program. The significant differences among the treatment means were compared by Least Significant Difference (LSD) at 5% level of probability (Gomez and Gomez 1984). The correlation was calculated on the basis of data from 0 days of storage, i.e. at harvesting day. The correlation graph was plotted with the help of Microsoft Excel 2016.

 

  SAARC J. Agric., 17(2): 173-184 (2019)
  DOI: https://doi.org/10.3329/sja.v17i2.45304
Funding Source:
1.   Budget:  
  

From the study, it can be concluded that the variety and vermicompost have shown statistically significant variation among the parameters studied under the experiment. Based on storage and processing parameters, it can be said that V3: BARI Alu-25 (Asterix) has shown better performance on most of the varieties, and M4: 6 t ha-1 has shown a significantly better result on most of the vermicompost levels. The potato growers of Bangladesh may apply vermicompost on their field at the rate of 6 t ha-1 for better processing quality in combination with potato varieties Lady Rosetta and Asterix. 

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