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Comparison of Drought Effect on Long and Short Duration Varieties of Aman Rice Under Different Dates of Direct Seeding and Transplanting

Prio lal Chandra Paul
SO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh

Dr M Towfiqul Islam
SSO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh

Dr M A Rashid
CSO & Head
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted to assess the effect of drought under different dates of transplanting rice and to select a suitable method, time of seeding and transplanting and varieties for getting maximum benefit from rainfall in Aman season.The Seeding dates were 5 June, 15 June, 25 June, 5 July, 15 July and 25 July and Transplanting dates were 5 July, 15 July, 25 July, 5 August, 15 August and 25 August. The Varieties were BRRI dhan33 (Short duration) and BRRI dhan49 (Long duration). Generally rainfall starts from April and continues to October but it was not equally distributed, so if we conserve water by levee management it will be used during land preparation, vegetative, reproductive and ripening stage, respectively. Most of the time drought affects in later part of the season during reproductive stage and ripening stages of rice. To avoid drought effect, seeding from 5 June to 15 June and transplanting form 15 July to 25 July is suitable for short duration variety like BRRI dhan33. For long duration variety (BRRI dhan49) seeding from 5 June to 15 June and transplanting from 5 July to 15 July is more suitable to escape drought effect.

Keywords: Drought mitigation, Long and short duration varieties, Aman rice, Direct seeding and transplanting

Location: BRRI farm, Gazipur

Start Date: 01-07-2010

End Date: 30-12-2010

Program Area: Risk Management in Agriculture

Non-commodity: Drought

Objectives:

To assess the effect of drought under different dates of transplanting rice.
To select a suitable method, time of seeding and transplanting and varieties for getting maximum benefit from rainfall in Aman season

Methodology:

The Seeding dates were 5 June, 15 June, 25 June, 5 July, 15 July and 25 July. And the transplanting dates were 5 July, 15 July, 25 July, 5 August, 15 August and 25 August.The Varieties BRRI dhan33 (Short duration) and BRRI dhan49 (Long duration) were used. Fertilizers were applied at the rate of 100, 50, and 67 Kg of Urea, TSP and MP per hectare, respectively. Fertilizers were applied at the rate of 100, 50, and 67 Kg of Urea, TSP and MP per hectare, respectively.

Source of Information: Proceedings of the BRRI Annual Internal Review for 2011, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

BRRI dhan33 suffered comparatively less drought than BRRI dhan49 due to its shorter growth duration. In DSR method for BRRI dhan33 the highest yield was obtained 4.94 t/ha at the seeding date of 5 June and the minimum yield was obtained 3 t/ha at the seeding date of 25 July. It was also observed that yield was higher at early seeding time than the late seeding time. For BRRI dhan49 in DSR method the maximum yield was found 4.72 t/ha at the seeding time of 25 July and minimum yield was found 2.92 t/ha at the seeding time of 5 June. In transplanted method the maximum yield was observed 5.26 t/ha for 5 July and minimum yield was observed 3.72 t/ha for 25 August. All DSR method the field duration is less than the

Knowledge Management: Report/Proceedings