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Effect of Dehaulming on Yield of Seed Potatoes

A. A. MAHMUD
Tuber Crops Research Centre, BARI, Joydebpur, Gazipur, Gazipur,

SAJEDA AKHTER
Tuber Crops Research Centre, BARI, Joydebpur, Gazipur,

M. J. HOSSAIN
Tuber Crops Research Centre, BARI, Joydebpur, Gazipur.

M. K. R. BHUIYAN
Tuber Crops Research Centre, BARI, Joydebpur, Gazipur,

M. A. HOQUE
Tuber Crops Research Centre, BARI, Joydebpur, Gazipur,

Abstract/ Executive Summary:

The yield of seed size tubers was assessed in five standard potato cultivars (Cardinal, Multa, Ailsa, Heera, and Dheera) in relation to dates of dehaulming (65, 70, and 80 days after planting) in a Seed Potato Production Farm, Debijong, Panchagarh during 1996-97 and 1997-98. Dehaulming at 70 days gave maximum seed size tubers (19.75 t/ha 76%) but significantly identical to 75 days (19.56 t/ha :70%) and 80 days (18.69 t/ha :63%). Considering all the parameters studied, the performance of Heera proved to be best among the cultivars grown. Among the cultivars, the maximum seed tuber yield was recorded from Cardinal at 80 DAP followed by Heera and Cardinal at 70 DAP, Dheera and Ailsa at 75 DAP. In general, most of the cultivars gave the maximum seed tuber yield when the crop was dehaulmed at 70 and 80 DAP and the lowest from 65 DAP.

Keywords: Dehaulming, Potato, Seed production.

Location: In a Seed Potato Production Farm, Debigonj, Panchagarh

Start Date:

End Date:

Program Area: Seed Technology

Commodity: Potato

Objectives:

To increase the proportion of seed size tuber through dehaulming at appropriate time.

Methodology:

The experiment was conducted at the Seed Potato Production Farm, Debiganj, Panchagarh of AEZ 3 during 1996-97 and 1997-98. The treatments were 5 (five) cultivars, such as Cardinal, Multa, Heera, Ailsa, and Dheera and 4 (four) dates of dehaulming (65, 70, 75, 80 DAP). Seed size (40-60g) whole tubers were planted at 60 em x 30 em spacing on 18 November 1996 and 15 November 1997. The unit plot size was 3m x 3m. The initial nutrient status of soils of the experimental plots was 17, 9, 3, and 6 J..Lg/ml of NH4-N, P, Zn, and S, respectively, and 0.10, 1.9, and 0.65 meq/100 ml of K, Ca, and Mg, respectively, and organic matter was 0.73%. The pH of the soil was 6.4. The soil type of the experimental site was sandy loam and the crops were fertilized @ 250 kg urea, 220 kg TSP, 200 kg MP, 120 kg Gypsum and 6 kg boric acid per hectare. Full dose of TSP, MP, Gypsum, boric acid, and one half of urea were applied during land preparation and the rest one half of urea was side dressed during first earthing up and weeding operations, 30 days after planting (DAP). The crops were irrigated four times and were regularly sprayed at 10 days interval with 0.2% desis. The experiment was conducted in a factorial randomized complete block design replicated thrice. The crops were harvested after 10 days of haulms cutting. Data on seed yield of seed tubers and yield attributes were recorded and analyzed statistically.

Source of Information: Bangladesh J. Agril. Res. 34(3) : 443-448, September 2009

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The cultivars did not show any significant variation for different parameters over the years so the pooled data were done . The cultivars differed significantly for most of the parameters studied . The. Cardinal showed the highest number of tubers per hill (14.56) which was statistically superior to all other treatments. The other treatments were statistically at par but lower than the previous one. The. Heera gave the maximum tuber weight per hill (533.50 g), which is corresponding to the highest total yield (29.54 t/ha) and seed tuber yield (19.27 t/ha). The highest total yield was recorded from Heera, but seed yield was not significantly influenced through non-seed yield from the same variety. In terms of seed tuber percentage, Multa was the best (72.60%) followed by Ailsa (71.82%) and Dheera (71.74%). A similar trend in reverse order for non-seed portion was observed, where Multa was the least (1:0.377) and Heera the highest (1:533).

Knowledge Management: Journal