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Effect of Sowing Date of Sweet Corn in Potato + Sweet Corn Intercropping

A.A.Begum
SSO
Agronomy Division, BARI, Gazipur

M.N.Islam
PSO
Agronomy Division, BARI, Gazipur

Abstract/ Executive Summary:

The experiment was conducted at the Agronomy research field of BARI, RARS, Jamalpur and ARS, Burirhat, Rangpur during the Rabi season of 2013-14 to find out appropriate sowing date of sweet corn as intercrop with potato for getting maximum yield and economic return. Six treatments namely simultaneous sowing of potato and sweet corn, sweet corn sown after 10 days of potato planting, sweet corn sown after 20 days of potato planting, sweet corn sown after 30 days of potato planting, sole potato and sole sweet corn were tested in this study. Sweet corn sown after 20 days of potato planting produced the highest potato equivalent yield, gross return, gross margin and benefit cost ratio at Joydebpur and Rangpur. But at Jamalpur, simultaneous sowing of potato and sweet corn showed better performance. The result revealed that sweet corn sown after 20 days of potato planting and/or simultaneous sowing of potato and sweet corn might be suitable for getting maximum yield and economic return.

Keywords: Sweet corn, potato & Intercropping

Location: Agronomy research field of BARI, RARS, Jamalpur and ARS, Burirhat, Rangpur.

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Farming System

Commodity: Potato, Maize

Objectives:

To find out suitable sowing date of sweet corn intercrop with potato for getting maximum yield and economic return.

Methodology:

The experiment was conducted at the Agronomy research field of BARI, RARS, Jamalpur and ARS, Burirhat, Rangpur during the Rabi season of 2013-14. The experiment was laid out in randomized complete block design with three replications. The size of a unit plot was 6.0 m × 5.0 m. Cardinal (BARI Alu-8) variety of potato was used at Joydebpur and Diamant (BARI Alu-7) was used in other two locations. Sweet corn variety BARI Sweet corn-1 was used in all locations. Potato was planted on 20, 22 and 24 November 2013 at Rangpur, Jamalpur and Joydebpur, respectively and sweet corn was sown according to the treatments. Sole potato and sole sweet corn were also planted on 20, 22 and 24 November 2013 at Rangpur, Jamalpur and Joydebpur, respectively. Potato was planted with 60 cm x 25 cm spacing in sole and 75 cm x 20 cm spacing in intercrop situation. Sweet corn was sown in 75 cm x 20 cm spacing both in sole and intercrop situation. In intercrop treatments, one row of sweet corn accommodated in between two rows of potato. For sole potato and sole sweet corn fertilizers were applied @ N₁₈₀P₄₀K₁₈₀S₂₀Zn₆B_1.2and N₁₆₀P₅₀K₁₀₀S₄₀Zn₄B₂ kg/ha, respectively (FRG, 2012). For intercrop fertilizers were applied @ N₃₂₀P₇₃K₁₇₀S₅₀Zn₆B₂kg/ha. The source of N, P, K, S, Zn and B was urea, TSP, MoP, gypsum, zinc sulphate and boric acid, respectively. In case of sole potato, half amount of urea and MoP and the whole amount of TSP, gypsum, zinc sulphate and boric acid were applied at the time of final land preparation. Remaining 2/3 amount of urea and MoP were applied at 30 days after planting (DAP). For sole sweet corn, one-third of urea and whole amount of other fertilizers were applied at the time of final land preparation. Remaining half amount of urea was applied in two equal splits as side dressing at 30 and 55 days after sowing (DAS). In case of intercrop, one- third urea and ½ of all other fertilizers were applied as basal. One-third urea and rest of all other fertilizers were side dressed at 30 DAP of potato and rest of urea was side dressed just after potato harvest followed by irrigation. Irrigation and other intercultural operations were done as and when required. Fungicide (Dithane M-45) was sprayed at every 10-day intervals beginning from 25 to 70 DAP for preventing potato disease. All necessary data were taken at harvesting. Potato was harvested at 97, 92, 90 DAP on 25, 22 and 22 February 2014 at Rangpur, Jamalpur and Joydebpur, respectively and sweet corn was harvested at 115-120 DAS at Joydebpur and Rangpur. Collected data of both the crops were analyzed statistically and the means were adjudged by LSD test. Economic analysis was also done considering local market price of harvested crops.

Source of Information: Annual Research Report 2013-2014, Agronomy Division, BARI, Gazipur.

Article Link (Online Journal):

Funding Source:

1. Government

Budget: 20,000/-

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

Achievement/Findings:

The results revealed that sowing of sweet corn 20 days after potato planting (100% potato: 100% sweet corn) might be agronomically suitable and economically profitable for sweet corn and potato intercropping at Joydebpur and Rangpur. But at Jamalpur simultaneous sowing of potato and sweet corn intercrop combination might be suitable and economically profitable. This is a first year experiment. It should be repeated for confirmation the results at all locations

Knowledge Management: Report/Proceedings