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Tuberization and Yield of Potato at High Temperature: Response to Growth Retardant and Disbudding

F. Ahmed
SSO
Agronomy Division, Gazipur

M. A. Hossain
CSO
Agronomy Division, Gazipur

Abstract/ Executive Summary:

A field experiment on chemical (use of growth retardant) and mechanical disbudding effect on potato was conducted at different sowing dates to evaluate the effect of growth retardant and disbudding on tuberization and yield of late sown potato where tuberization starts at high temperatures. Three sowing dates viz. November 30, December 15 and December 30 and three disbudding viz. no disbudding, Maleic Hydrazide (MH) spray at 30 days after planting (DAP), only terminal bud removal at 30 DAP, and terminal bud along with younger 2-leaf removal + axillary bud removal at 30 DAP. Sowing dates showed significant influence on tuber yield. The highest tuber yield (24.64 t/ha) was recorded in November 30 sowing while the lowest (14.74 t/ha) in December 30 sowing. Disbudding showed negative impact on tuber yield. The highest yield (20.60 t/ha) was recorded in no disbudding treatment and the lowest (16.87 t/ha) in bud removal along with younger 2-leaf + axillary bud removal at 30 DAP. Combined effect of sowing dates and disbudding were not significant for tuber yield.

Keywords: Growth retardant, Disbudding, High temperature, Tuberization, Yield, Potato

Location: Joydebpur, Gazipur

Start Date: 30-11-2011

End Date: 02-03-2012

Program Area: Crop-Soil-Water Management

Commodity: Potato

Objectives:

To evaluate the effect of growth retardant and disbudding on tuberization and yield of late sown potato where tuberization starts at high temperatures.

Methodology:

The experiment was conducted at the research field of Agronomy Division, BARI, Joydebpur, Gazipur during rabi season of 2011-12. Three sowing dates, November 30 (S₁) December 15 (S₂) and December 30 (S₃) and four disbudding, no disbudding (D₁), MH spray at 30 DAP (D₂), terminal bud removal at 30 DAP (D₃) and terminal bud along with younger 2-leaf removal + axillary bud removal at 30 DAP (D4) were used in the study. The experiment was laid out in split plot design with three replications. The unit plot size was 2 m x 2.4 m. Whole tubers of potato (var. Dimont) were sown according to treatments with 60 cm x 25 cm spacing. Fertilizers were applied at the rate of 135-30-135-15-10-4-0.8 kg/ha NPKSMgZnB and cowdung 4t/ha. Half of N and K, and all other fertilizers was applied at final land preparation. Remaining ½ N and K was side dressed at 30-35 DAP. Irrigation was done as and when required to maintain optimum soil moisture. At harvest, three plants per plot were sampled for yield component data and yield data was collected from whole plot. Data were analyzed statistically and mean separation was done by LSD test.

Source of Information: Annual Report, Agronomy Division 2011-12, BARI

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget: 20,000/-

Total Budget (Tk.) : 20,000/-

Achievement/Findings:

Sowing dates showed significant influence on tuber yield. The highest tuber yield (24.64 t/ha) was recorded in November 30 sowing while the lowest (14.74 t/ha) in December 30 sowing. Disbudding showed negative impact on tuber yield. The highest yield (20.60 t/ha) was recorded in no disbudding treatment and the lowest (16.87 t/ha) in bud removal along with younger 2-leaf + axillary bud removal at 30 DAP.

Knowledge Management: Report/Proceedings