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Coordinated Project on Water Management for Enhancing Crop Production Under Changing Climate: BRRI Component.trial: Irrigation Scheduling of Boro Rice.-2014

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

Dr. Md. Mahbubul Alam
SSO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Priya Lal Chandra Paul
SSO
Irrigation and Water Management Division, BRRI, Gazipur-1701, Bangladesh.

Abstract/ Executive Summary:

A field experiment was conducted to conjunctive use of water resources in the study area; to develop appropriate water management technologies for increasing crop production, cropping intensity, irrigation efficiency, land and water productivity for improved livelihood; and to identify water resources management technologies to mitigate consequences of climate change. The study site was Satkhira, Kapasia and Bakerganj area. Four irrigation scheduling treatments were as: T₁ = Farmers’ practice (keeping standing water), T₂ = Irrigation when water level reaches 20 cm below the ground surface, T₃ = Irrigation when water level reaches 30 cm below the ground surface and T₄ = Irrigation when water level reaches 40 cm below the ground surface. The highest yield was obtained 6.4 t/ha from treatment T₂ in Kapasia and the lowest 4.1 t/ha from treatment T₄in Satkhira and Kapasia. Treatment T₂gave highest yield in each location and saved 26%, 22% and 17% water over the treatment T₁ in Satkhira, Kapasia and Bakerganj area respectively. It was found that yield in treatment T₂ was 3.6%, 3.2% and 2% higher than treatment T₁in Satkhira, Kapasia and Bakerganj area respectively.The highest amount of irrigation water was needed to maintain continuous standing water, which was 1315 mm in Satkhira, 1080 mm in Kapasia and 1440 mm in Bakerganj area but in AWD treatments (T₂ = applying irrigation when water level was 20 cm below soil surface) those were 967 mm, 846 mm and 1195 mm respectively. The above results indicated that treatments T₃and T₄were not suitable for irrigation scheduling in Boro season because of yield reduction. Maximum irrigation water was needed to maintain continuous standing water (T₁). Therefore, AWD method (T₂) allowing water level up to 20 cm below ground surface was suitable for Boro irrigation.

Keywords: Irrigation sceduling, Water management, AWD

Location: Satkhira, Kapasia and Bakerganj area

Start Date: 01-07-2013

End Date: 30-06-2014

Program Area: Risk Management in Agriculture

Commodity: Rice

Objectives:

To conjunctive use of water resources in the study area;
To develop appropriate water management technologies for increasing crop production, cropping intensity, irrigation efficiency, land and water productivity for improved livelihood; and
To identify water resources management technologies to mitigate consequences of climate change.

Methodology:

Study sites were Satkhira, Kapasia and Bakergonj. Four irrigation scheduling treatments were -T₁ = Farmers’ practice (keeping standing water), T₂ = Irrigation when water level reaches 20 cm below the ground surface, T₃ = Irrigation when water level reaches 30 cm below the ground surface, T₄ = Irrigation when water level reaches 40 cm below the ground surface. Soil moisture was determined by oven dry method. BRRI dha29 was used. Fertilizer doses were 100-80-60-20 kg/ha of NPKS, respectively.

Source of Information: Proceedings of the BRRI Annual Review for 2014, BRRI, Gazipur-1701, Bangladesh

Article Link (Online Journal):

Funding Source:

1. Bangladesh Agricultural Research Council	Budget:
2.	Budget:

Total Budget (Tk.) :

Achievement/Findings:

The topography of the land being medium high and soil type was found sandy loam in Satkhira and clay loam in Kapasia. The total rainfall during the growing period was 127 mm, 163 mm and 210 mm in Satkhira, Kapasia and Bakerganj area respectively. The highest yield was obtained 6.4 t/ha from treatment T₂ in Kapasia and the lowest 4.1 t/ha from treatment T₄in Satkhira and Kapasia. Treatment T₂gave highest yield in each location and saved 26%, 22% and 17% water over the treatment T₁ in Satkhira, Kapasia and Bakerganj area respectively. It was found that yield in treatment T₂ was 3.6%, 3.2% and 2% higher than treatment T₁in Satkhira, Kapasia and Bakerganj area respectively. The highest amount of irrigation water was needed to maintain continuous standing water, which was 1315 mm in Satkhira, 1080 mm in Kapasia and 1440 mm in Bakerganj area but in AWD treatments (T₂ = applying irrigation when water level was 20 cm below soil surface) those were 967 mm, 846 mm and 1195 mm respectively. The grain yield was significantly influenced by different levels of water supply.

Knowledge Management: Report/Proceedings