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Water Management- Suitable Technology Under Climate Change Environment. -2012

Dr M A Rashid
CSO and Head
IWMD, BRRI

Abstract/ Executive Summary:

A field experiment was conducted to find out suitable groundwater for irrigation by installing observation wells at different depths, to monitor water and soil salinity round the year to evaluate the suitability of the coastal water resources for irrigation and to increase crop production in saline areas by utilizing coastal water resources. Groundwater salinity was monitored. The fluctuation of water salinity was not very wide. The salinity level was below the permissible maximum limit (4 ds/m) for irrigation water. So, the groundwater of this area is less saline during T Aman season and is suitable for irrigation use. Therefore, rice can be grown using this water. The yield of different rice varieties in the demonstration plots in T Aman season shows that the varieties were BRRI dhan41, BR11, BRRI dhan53, BRRI dhan54, BRRI dhan46 and BR23. The average yield of the corresponding varieties were 5.20, 5.40, 5.20, 6.00, 5.40, and 4.00 t/ha respectively. The highest yield was recorded for BRRI dhan54 (6.00 t/ha) and the lowest for BR23 (4.00 t/ha). The yield was less because this plot was in a low land area and was submerged in water for a few days. The average yield was 5.2 t/ha which was about 1.00 t/ha higher than that of average yield (4.15 t/ha) under farmer condition. Field demonstrations were also conducted in Parulia area of Debhata upazilla during Boro seasons 2012. It was found that the yield of BRRI dhan28, BRRI dhan29 and BRRI dhan47 were 6.2, 5.04, and 5.14 t/ha, respectively. So, the highest yield 6.2 t/ha) was obtained from BRRI dhan28. These results showed that there is an excellent scope of increasing rice production during Boro season using less saline groundwater.

Keywords: Coastal zone, Water productivity, Salinity, Fresh groundwater

Location: Parulia area,under Debhata upazilla, Satkhira

Start Date: 01-07-2011

End Date: 30-06-2012

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To find out suitable groundwater for irrigation by installing observation wells at different depths.
To monitor water and soil salinity round the year.
To evaluate the suitability of the coastal water resources for irrigation.
To increase crop production in saline areas by utilizing coastal water resources.

Methodology:

Source of Information: Proceedings of BRRI Annual Internal Review for 2012

Article Link (Online Journal):

Funding Source:

1. Bangladesh Agricultural Research Council

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The yield of different rice varieties in the demonstration plots in T Aman season shows that the varieties were BRRI dhan 41, BR 11, BRRI dhan 53, BRRI dhan 54, BRRI dhan 46 and BR 23. The average yield of the corresponding varieties were 5.20, 5.40, 5.20, 6.00, 5.40, and 4.00 t/ha respectively. The highest yield was recorded for BRRI dhan 54 (6.00 t/ha) and the lowest for BR 23 (4.00 t/ha). The yield was less because this plot was in a low land area and was submerged in water for a few days. The average yield was 5.2 t/ha which was about 1.00 t/ha higher than that of average yield (4.15 t/ha) under farmer condition

Field demonstrations were also conducted in Parulia area of Debhata upazilla during Boro seasons 2012. It was found that the yield of BRRI dhan28, BRRI dhan29 and BRRI dhan47 were 6.2, 5.04, and 5.14 t/ha, respectively. So, the highest yield 6.2 t/ha) was obtained from BRRI dhan28.

These results showed that there is an excellent scope of increasing rice production during Boro season using less saline groundwater.

Knowledge Management: Report/Proceedings