M. A. Hossain
Scientific Officer
IWM Division, BARI, Gazipur
M. A. Razzaque Akanda
Senior Scientific Officer
IWM Division, BARI, Gazipur
Md. Abdullah
PSO
IWM Division, BARI, Gazipur
M. S. Alam
Senior Scientific Officer
BARI, Gazipur
M. A. Bhuiyan
Scientific Officer
BARI, Gazipur
The experiment was conducted to determine water extraction pattern, water productivity and the effect of deficit irrigation on the yield of wheat in bed planting method during the rabi seasons of 2003-2004 and 2004-2005 at the research field of irrigation and water management division, BARI, Gazipur. It was found that up to 20-30% less water than conventional practice, wheat had no significant impact on the yield when it was planted in bed. The highest water productivities of 1.99 kg/m3 and 2.04 kg/m3 in 2003-2004 and 2004-2005 were found respectively by applying 30% and 20% less irrigation water in bed planting method. The highest yields of 4.48 and 4.20 t/ha were obtained from conventional (farmer's practice) and bed planting methods respectively, due to the excess area coverage by the farmer practice.
Wheat, Irrigation efficiency, Water saving, Bed planting
Research field of IWM Division, BARI, Gazipur
The study was undertaken to evaluate seepage pattern and to determine the effect of deficit irrigation on the yield of wheat as well as to determine the water productivity in bed planting method.
The experiment was conducted on wheat (Variety-Shatabdi) during the rabi seasons of 2003-2004 and 2004-2005. The soil was silty clay loam with an average bulk density of 1.5 g/cc, wilting point 14.7 percent and field capacity 28 percent (by weight basis). The experiment was laid out in randomized complete block design with seven treatments and three replications. The size of the unit plot was 2.8 m ×5.0 m.
The treatments were;
T1 = Conventional method (Irrigation up to field capacity)
T2 = 10% less water than depleted soil moisture
T3 = 20% less water than depleted soil moisture
T4 = 30% less water than depleted soil moisture
T5 = 40% less water than depleted soil moisture
T6 = 10% excess water than depleted soil moisture
T7 = 20% excess water than depleted soil moisture
Seeds were sown on 01 December 2003 and 27 November 2004. Seepage in bed and furrow was determined by monitoring moistures in different soil profiles of 0-15, 15-30 and 30-45 cm depths. Soil moisture was monitored by gravimetric method. Fertilizers were applied at the recommended doses of N100, P35, K25 and S22 kg/ha. All the P, K and S and two thirds of N were applied at the time of final land preparation and the rest one third of N was applied at the time of first irrigation at the crown root initiation (CRI) stage. Three irrigations (30 DAS, 55 DAS and 80 DAS) were applied to the all treatments. The scheduled fourth irrigation was not applied due to rainfall. Crops were harvested on 30 March 2004 and 29 March 2005. Yield and yield contributing parameters such as, spike length, spike/m2, grains per spike, 1000-grain weight were recorded. Rainfall data were collected from weather station, Joydebpur, Gazipur.
Annual Research Report 2004-2005, IWM, BARI
From the two years results, water productivity was found the highest by applying 20 - 30% less irrigation water in bed planting method. But the yield was 7-10 % less in bed planting method compared to conventional method. To compensate yield in bed, line spacing and bed size should be reduced.
Report/Proceedings