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Judicious Irrigation for Boro Rice Cultivation in Shallow Tubewell Irrigation Project, Thakurgaon

M. N. Hasan
Senior Agricultural Engr.
Irrigation and Water Management Division, BRRI, Gazipur 1210

L. R Khan
Professor
Irrigation and Water Management Department, BAU, Mymensingh and V.C BASMRAU, Salna, Gazipur.

A. F. M Saleh
Professor
Institute of Water and Flood Management, BUET, Dhaka

M. A. Khair
Professor
Irrigation and Water Management Department, BAU, Mymensingh

Abstract/ Executive Summary:

This study undertaken to determine water use efficiency for different water regimes, number of irrigation and amount of water needed to achieve optimum yield in medium low land during Boro seasons of 2001-02 and 2002-03 at Thakurgaon. The study shows that continuous standing water is not necessary for optimum yield of rice. Moreover, without significant yield reduction, about 41 percent and 37 percent of valuable irrigation water can be saved over treatment, T1 (continuous standing water) by practicing the treatment T2 (Irrigation of 7cm depth after 3 days of disappearance of standing water) and treatment T3 (Irrigation of 7cm depth after 5 days disappearance of standing water) respectively. Similarly treatment T2 was found significant with treatments T3 and T4 (Irrigation of 7cm depth after 7 days disappearance of standing water) in respect of yield during 2002 and 2003. So continuous standing of water in the rice field was found unnecessary rather irrigation depth of 7.0cm may be applied after 3 days of disappearing of standing water in the rice field for better economic viability.

Keywords: Irrigation, Water management, Boro rice, Thakurgaon

Location: STW, Thakurgaon

Start Date: 01-11-2001

End Date: 31-07-2003

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

To determine optimum utilization of irrigation water and maximizing the yield for rice cultivation by reducing excessive losses.

Methodology:

This study was undertaken to determine water use efficiency for different water regimes, number of irrigation and amount of water needed to achieve optimum yield. This study was carried out in medium low land during Bora seasons of 2001-02 and 2002-03 at one selected STW, Thakurgaon. Experiment was conducted with the following four treatments T₁= continuous standing water, 7cm; T₂= Irrigation with a depth of 7cm after 3 days of disappearing of standing water; T₃= Irrigation with a depth of 7cm after 5 days of disappearing of standing water; T4= Irrigation with a depth of 7cm after 7 days of disappearing of standing water. Treatments were replicated three times with variety BRRI Dhan 29. Randomized Complete Block Design (RCBD) was used in this experiment. Forty five days old seedling was used and planted with a spacing of 20cm x 15cm. The fertilizer was applied at the rate of 270, 130, 120, 70, 10 kg/ha of Urea, Triple super phosphate, Murate of Potash, Gypsum and Zinc sulphate respectively. The applied irrigation water was measured. Rainfall was measured in the experimental site with a rain gauge. A spacing of 1 meter was maintained in between two adjacent treatment plots to avoid the interference of water from one treatment to another. Experiment was conducted within a farmer's managed STW project in Thakurgaon. The data like: (i) Amount of water used for different treatments (mm) (ii) Seepage and percolation losses (rnm/day) (iii) Evaporation (mm/day) (iv) Rainfall (mm) and (v) Yield and Yield components were collected for this study.

Source of Information: Journal of Agricultural Engineering, Dec. 2008, Vol.35/AE, pp:29-36, ISSN:0379-4318.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

So continuous standing of water in the rice field was found unnecessary rather irrigation depth of 7.0cm may be applied after 3 days of disappearing of standing water in the rice field for better economic viability.

Knowledge Management: Journal