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Alternate Wetting and Drying Irrigation System on Growth and Yield of Hybrid Boro Rice

A. Nasir
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207

S. Shahriar
Department of Soil Science, Sher-e-Bangla Agricultural University, Dhaka-1207

W.S. Rupa
Department of Agricultural Chemistry, Sher-e-Bangla Agricultural University, Dhaka-1207

H. Mehraj
Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

A.F.M. Jamal Uddin
Department of Horticulture; Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at Farm of Sher-e-Bangla Agricultural University, Bangladesh from December 2011 to April 2012 to study the influence of AWD irrigation system on growth and yield of Boro rice (HIRA HYBRID dhan2). The experiment consisted nine levels of irrigation were used. Maximum number of total tillers (26.7/hill), number of effective tillers (21.5/hill), panicle length (31.5 cm), number of grains (215.5/panicle), 1000-grains weight (24.0 g), grain yield (7.8 t/ha) and straw yield (7.5 t/ha) were found from T₃ (Start irrigation when water table in the porous tube at 10 cm). Maximum concentrations of grain N (1.20%), P (0.38%), K (0.39%) and S (0.10%) were recorded from T₃; similarly maximum concentrations of straw N (0.69%), P (0.20%), K (1.87%) and S (0.10%) were also from T3. Maximum pH (5.9), organic matter (1.26%) were recorded from T₁ treatment and total N (0.075%), available P (19.89 mg/kg soil), exchangeable K (0.12 meq/100 g soil) and available S (14.66 mg/kg soil) were recorded from T₃. T6 (Start irrigation after 7 days disappearance of water) treatment was found as the worst in terms of most of the parameters.

Keywords: Boro rice, AWD, Growth, Yield

Location: Farm of Sher-e-Bangla Agricultural University, Bangladesh

Start Date: 00-12-2011

End Date: 00-04-2012

Program Area: Crop-Soil-Water Management

Commodity: Water management

Objectives:

To study the influence of alternate wetting and drying (AWD) irrigation system on growth and yield of Boro rice

Methodology:

The experiment was conducted at the Farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from December 2011 to April 2012 to study the effect of alternate wetting and drying irrigation system on the growth and yield of hybrid Boro rice. HIRA HYBRID dhan2 (from China) was used in this experiment. Experiment consisted nine treatments viz. T₁: Continuous submergence (1 to 7 cm standing water); T₂: Start irrigation when water table in the porous tube (it was 30 cm long plastic pipe having a diameter of 15 cm with many holes on all sides of the basal half) at 15 cm; T₃: Start irrigation when water table in the porous tube at 10 cm; T₄: Start irrigation when water table in the porous tube at 5cm; T₅: Start irrigation when disappearance of water by naked eyes; T₆: Start irrigation after 7 days disappearance of water; _T7: Start irrigation after 5 days disappearance of water; T₈: Start irrigation after 3 days disappearance of water and T₉: Start irrigation after 1 days disappearance of water using Randomized Complete Block Design with three replication. The unit plot size was 3.5 m × 2.5 m and the plots were separated through raising soil bund up to 25 cm from the soil level. The blocks were separated by one meter drains. In each sub-plot a 30 cm diameter and 40 cm long PVC pipe was installed in the centre of the sub-plot. Seedlings were transplanted on 12 January, 2012 in well puddled plot maintaining 20 cm × 15 cm spacing. The sources of nitrogen, phosphorus, potassium, sulphur and zinc were urea, triple super phosphate (TSP), muriate of potash (MOP), gypsum and zinc oxide, respectively. Urea was applied in 3 equal splits: one third was applied at basal before transplanting, one third at active tillering stage (30 DAT i.e., days after transplanting) and the remaining one third was applied at 5 days before panicle initiation stage (55 DAT). Before land preparation, initial soil samples at 0-15 cm depth were collected from different spots of the experimental field. The initial soil sample was analyzed for particle size distribution, particle density, bulk density, pH, organic carbon, total nitrogen, available P and exchangeable K which were given. Data were collected on plant height, number of tillers/hill, length of panicle (cm), number of grains/panicle, filled grains/ panicle, 1000 grains weight (g), grain yield and straw yield. Particle size analysis of soil was done by hydrometer method and the textural class was determined by plotting the values for percent sand, percent silt and percent clay to the Marshall’s Textural Triangular Coordinate following the USDA system. Particle density of soil was determined by volumetric flask method. Bulk density of soil was determined by core sampler method. Soil pH was measured by glass electrode pH meter using soil water suspension of 1:2.5. Organic carbon in soil sample was determined by wet oxidation method. Total N content of soil were determined followed by the Micro Kjeldahl method. Determination of P, K and S from plant samples were done. Collected data were statistically analyzed using the MSTAT-C computer package program and mean differences were adjusted by Duncan’s Multiple Range Test at 5% level of significance.

Source of Information: J. Soil Nature 7(2):28-35, 2014

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Alternate wetting and drying irrigation had significant effect on yield and yield contributing characters of Boro rice. Irrigating field when water table in porous tube at 10 cm is most favorable for improving yield and yield contributing characters of HIRA HYBRID dhan2 in Boro season.

Knowledge Management: Journal