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Development and Utilization of Coastal Water Resources for Crop Production and Its Impact on the Coastal Ecosystem of Bangladesh-study on Optimal Utilization of Rainwater for Mv Rice Cultivation-2004

Dr M K Mondal
SSO
IWMD, BRRI, Gazipur

Dr S P Ritu
SSO
IWMD, BRRI, Gazipur

Abstract/ Executive Summary:

The study was conducted at Kismat Fultola, Khulna with the objectives to maximize rainwater utilization for increasing productivity in T Aman season; and to create environment for establishment of rice in Boro season to avoid crop failure due to salinity. The study reveals that the average yield of both aromatic and non-aromatic MV rice was about 4.5 t ha^-1 in the coastal areas. Yield of 15 T Aman rice varieties and one advanced line at Kismat Fultola varied from 3.0 to 5.5 t ha^-1, in which non-aromatic HYV rice yielded from 4.5 to 5.5 t/ha. Even aromatic rice produced (3.0 t/ha) which was higher than of farmers’ yield. Yield difference of modern and local rice varieties was about 2.0-4.0 t ha^-1. Such high yield difference indicated the potentials of increasing yields and farm income in wet season by adopting modern varieties. Farmers also mentioned that BR23 performed better than BR25 in comparatively low lying areas where water stagnated. Therefore, HYV rice, whether salt-tolerant or not, can be successfully grown in the wet season and 2-3 times more yield can be obtained over the present production level.

Keywords: Rainwater utilization, Salinity, HYV rice

Location: Kismat Fultola, Khulna

Start Date: 01-07-2003

End Date: 30-06-2004

Program Area: Crop-Soil-Water Management

Commodity: Rain water

Objectives:

To maximize rainwater utilization for increasing productivity in T Aman season; and
To create environment for establishment of rice in Boro season to avoid crop failure due to salinity.

Methodology:

An experiments were conducted to maximize rainwater utilization for increasing productivity in T Aman season and to create environments for early establishment of Boro rice to avoid crop failure due to higher soil and water salinity at the later growth stage of Boro rice. BRRI developed 15 HYV rice and one advanced line BR6110-10-1-2 were transplanted at Kismat Fultola village in the last week of July in a crop museum of 0.2 ha of land. The varieties were: BR10, BR11, BR22, BR23, BR25, BRRI dhan30, BRRI dhan31, BRRI dhan32, BRRI dhan33, BRRI dhan34, BRRI dhan37, BRRI dhan38, BRRI dhan39, BRRI dhan40, BRRI dhan41. Among these varieties BRRI dhan34, BRRI dhan37 and BRRI dhan38 were aromatic HYV rice. Besides, 29 farmers cultivated 2-5 varieties on their fields inside the 3.5 ha experimental block. About 30 days old seedlings were transplanted with the spacing of 20 cm x 20 cm and BRRI recommended fertilizer was applied for rice cultivation i.e., at the rate of 180/150-100-70-60-10 kg urea, TSP, MP, gypsum and zinc sulfate per ha. All the fertilizers were applied at the time of final land preparation except urea, one-third of which was applied as basal and the rest two-third were applied in three equal splits at an interval of 15-20 days. Although rainfall was sufficient to meet up crop water requirements for rice, farmers drained out conserved rainfall during top-dressing of urea. Supplemental irrigation was provided to T Aman rice during neap tide through the flash gate and irrigation canal networks to facilitate growth and development of MV rice. For yield, 5 m² area was harvested four from four corners and one from the middle of the rice field and yield was finally adjusted to 14% moisture content.

Source of Information: Proceedings of the BRRI Annual Internal Review, 2004, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. World Bank

Budget:

Total Budget (Tk.) :

Achievement/Findings:

All the varieties performed well as it perform in other parts of the country and the highest yield was obtained in BRRI dhan40. Yield of all the rice varieties were lower in 2003 than 2002 mostly due insect and pest attack. Two years average yield showed that BR11 gave the highest yield followed by BRRI dhan40. Even BR10, BR22, BRRI dhan32 and BR 6110-10-1-2 produced close to 5.0 t/ha in the coastal region.

Knowledge Management: Report/Proceedings