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Effect of Irrigation Interval Based on Awd for Water Saving and N Fertilization Methods (usg and Prilled Urea) in Transplanted Rice Cultivation Under Different Rice Varieties (mv and Hybrid)

Dr Md Nazmul Hassan
Principle Scientific Officer
Irrigation and Water Management Division, BRRI.

Shahana Parveen
Senior Scientific Officer
Irrigation and Water Management Division, BRRI.

Md Mozammel Haque
Scientific Officer
Soil Science Division, BRRI

Dr M A Sattar
Head and Chief Scientific Officer
Irrigation and Water Management Division, BRRI.

Abstract/ Executive Summary:

The study was conducted on effect of irrigation interval based on AWD for water saving in transplanted rice cultivation under different rice varieties (MV and Hybrid). Water productivity was highest (7.75 kg.ha^-1mm^-1) for BRRI dhan29 with 5-7 cm irrigation when water level was 15 cm below the soil surface. The highest grain yield (5820 kg.ha^-1) was recorded with 5-7 cm irrigation when water level was 15 cm below the soil surface for BRRI dhan29 with USG. The highest nutrient uptake (104 kg.ha^-1) was recorded with 5-7 cm irrigation when water level was 15 cm below soil surface for BRRI dhan28 with USG.

Keywords: Irrigation interval, AWD, Water saving, N fertilizers, (USG and prilled urea, Rice varieties (MV and hybrid)

Location: BRRI farm Gazipur.

Start Date: 01-07-2008

End Date: 30-06-2009

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

• To quantify amount of water needed for MV and hybrid rice cultivation (Short and long duration) • To determine N-use efficiency by practicing AWD for different soil type • To determine WUE, water productivity and profitability of AWD for boro rice

Methodology:

The field experiment was conducted at BRRI farm, Gazipur, during 2008-09. The treatment comprised three levels of irrigation (I₁=irrigation when water was 15 cm below the soil surface, I₂=irrigation when water was 20 cm below the soil surface I₃=irrigation after 3 days of disappearing standing water), four varieties (BRRI dhan28, BRRI dhan29, BRRI hybrid 2, Hybrid Heera) and two levels of fertilizer (prilled urea, USG)

Source of Information: Proceedings of BRRI Annual Internal Research Review, 2008-2009

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Water productivity was highest 7.75 kg.ha-1.mm-1 in irrigation when water was 15 cm below the soil surface with variety BRRI dhan29. BRRI dhan29 gave the better performance (88 and 85%) in terms of WUE (Water use efficiency) when irrigation 5-7 cm when water was 20 cm below the soil surface and when irrigation 5-7 cm when water is 15 cm below the soil surface, respectively. The highest grain yield (5820 kg.ha^-1) was recorded along with irrigation 5-7 cm when water was 15 cm below the soil surface, BRRI dhan29 and USG. Highest nutrient uptake (104kg.ha^-1) was recorded along with irrigation 5-7 cm when water was 15 cm below soil surface, BRRI dhan28 and USG.

Knowledge Management: Report/Proceedings