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Effects of Spacing on Seedling Tuber Production from True Potato Seeds

M. H. Sarker
Potato Research Centre, BARI, Joydebpur, Gazipur.

M. H. Kabir
Potato Research Centre, BARI, Joydebpur, Gazipur.

Abstract/ Executive Summary:

The effect of nine different spacing of directly sown hybrid true potato seed (TPS) progeny, 'Serrana × DTO-28' on seedling tuber production and plant characters were assessed. The percentage of foliage coverage and yield due to treatments were found significantly different. The percentage of foliage coverage at 40 and 60 days after sowing ranged from 40.33 to 70.00 and 78.33 to 97.00 respectively. The maximum foliage coverage was obtained from 10 × 5 cm also gave the highest yield ( 39.67 t/ha) while the lowest yield ( 24.17 t/ha) was obtained from 30 × 15 cm spacing. The maximum number of tubers were produced in the closer spacing.

Keywords: Spacing on seedling, Tuber production, True potato seeds

Location: Potato Research Centre, BARI, Joydebpur and Munshiganj

Start Date: 00-00-1986

End Date: 00-00-1988

Program Area: Crop-Soil-Water Management

Commodity: Potato

Objectives:

To determine the optimum spacing for the production of seedling tubers from TPS under Bangladesh condition.

Methodology:

Two experiments were conducted at the Potato Research Centre, BARI, Joydebpur and Munshiganj during two consecutive potato seasons ( 1986-87 and 1987-88 ) with 9 different spacing. The TPS progeny "Serrana × DTO-28" was used in this study. The unit plot size was 1 × 1.5 m. The experiment was laid out in RCBD with three replications. The unit plot (beds 15 cm in height) were prepared with a mixture of 1 part subsoil. Before preparing the mixture, cowdung, river sand and subsoil were disinfected by drying in the sun for 3-4 days. The TPS were sown in the unit plots with 3-4 seeds per hill during the 1st week of November. Seeds were sown as per different spacings at a depth of 1 cm. Fertilizers in the forms of urea, triple super phosphate and muriate of potash were applied at rate of 100, 200, 100 kg/ha. The entire dose of triple super phosphate and muriate of potash and half of urea were applied in the substrate before sowing and the remaining of urea was applied after 40 days of sowing. Watering was done by water can to keep the soil adequately moist during the period of emergence and seedling growth. The seedlings were dept under shade during the first two weeks after seedling in order to protect the seedlings from direct sun and rain. Three weeks after sowing, the seedling were thinned out to one seedling. Harvesting was done at full maturity after 110 days of sowing. The tubers of different treatments were divided into four size grades, namely, 10 mm, 10-20 mm 20-30mm and above 30mm.

Source of Information: Bangladesh Horticulture Vol:17 (No-1), pp: 11-14, 1989; ISSN 0379-4288

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The highest yield was obtained in the spacing treatment 10x5 cm (39.47 t/ha) which was followed by 10x10cm (37.17 t/ha). The lowest yield was obtained from the spacing of 30x15cm (24.17 t/ha). The results indicate that increasing plant population had a positive effect on the number of tubers. But the mean weight of tubers was very little affected due to varietal characters.

Knowledge Management: Journal