Khokan Kumer Sarker
Scientific Officer
Wheat Research Centre, BARI, Nashipur, Dinajpur
S. K. Biswas
SSO
Irrigation and Water Management Division, BARI, Gazipur
P. K. Malaker
PSO
Wheat Research Centre, BARI, Nashipur, Dinajpur
Akbar Hossain
SO
Wheat Research Centre, BARI, Nashipur, Dinajpur
The study was conducted to evaluate the performance of four irrigation systems using BARI flow diversion device, border irrigation, and traditional hose pipe, and flooding irrigation method on seasonal water use, field irrigation efficiency and water use efficiency for wheat during rabi season of 2007-2008. The study was carried out at Dinajpur. Irrigation scheduling and application rates were applied based on effective cumulative pan evaporation adjusted for rainfall at the ratio of IW:ECE was 0.85 under the irrigation regimes of crown root initiation (17-21DAS) + booting stage (45-50DAS) + early grain filling stage (75-80DAS). Total seasonal water, field irrigation efficiency and water productivity were 248 mm, 91%, 2.2 kg m-3 respectively, using BARI flow diversion device; 271 mm, 81%, 2.0 kg m-3, respectively, using border irrigation and 257 mm, 86% and 2 kg m-3, respectively, using traditional hose pipe method. Seasonal water use was found 289 mm in flooding irrigation system. Field irrigation efficiency and water productivity in this method were 70% and 1.6 kg m-3, respectively. Water could be saved up to 23%, 8% and 14% using BARI flow diversion device, border irrigation and traditional irrigation systems, respectively, compared to that of flooding irrigation method.
Water conveyance, Irrigation, Wheat
Wheat Research Centre, Nashipur, Dinajpur
Crop-Soil-Water Management
The specific objectives are; (i) to determine the seasonal water use, field irrigation efficiency and water saved by the selected methods, (ii) to compare the yield performances and water use efficiencies.
The study was carried out during the rabi season of 2007-2008 at Wheat Research Centre (WRC) Dinajpur. The irrigation performances evaluated with different irrigation systems like BARI flow diversion device (BFDD), border irrigation (BI), traditional hosepipe (THP) and flooding irrigation (FI). Four large plots were chosen for the study. The unit plot size was 40 × 24 m with three replications. Irrigation scheduling and application rates of irrigation water for wheat were based on effective cumulative pan evaporation (CPE). The effective rainfall was adjusted to the irrigation scheduling. BARI flow diversion device using hosepipes (2-inch dia. 100 feet long) were used to spread water across a field to ensure the water availability according to meet crop water needs. For border irrigation, the field was divided into three strips by parallel border ridges, and each strip was irrigated independently using 100 feet long earthen channel. Border strips were 40 × 8 m. Flooding irrigation, water was applied freely from the irrigation source using 100 feet long earthen channel. For traditional irrigation system, plastic hose pipe (4-inch dia.) was used to apply the irrigation water to the experimental plot. The field irrigation efficiency was calculated. The seasonal water use (WR) was computed by adding measured quantities of irrigation, the rainfall received during the season and the contribution of soil moisture (SWC) from the soil. Water use efficiency was used in evaluating the yield performance and water management practices. A high yielding variety BARI gom–24 (Pradip) was sown with the help of PTOS at the rate of 100 kg ha.-1 Weeding was done at 32 DAS by BARI dry land weeder. Fertilizers were applied at the rate, N100 P26 K40 S20 B1 kg/ha-1. After threshing and cleaning, grain yields were recorded at 12 % moisture content.
IWM Annual Report, BARiI; Bangladesh J. Agri. Engg. 19 (1 & 2) 39-46:2008
Improved irrigation systems in which water is uniformly distributed to the fields by means of BARI flow diversion device can be used with shallow tube well, underground pipe lines irrigation or any other water supply sources. Total water supply and seasonal water through improved irrigation systems were less compared to flooding irrigation systems. Using BARI flow diversion device, border irrigation and traditional hose pipe, water could be saved up to 23, 8 and 14 %, respectively as compared to flooding irrigation system. Field irrigation efficiency and water productivity was maximum using BARI flow diversion device. So, there is a great opportunity to increase the field coverage and water productivity according to crop water demand by adequate planning of the irrigation method and efficient operation of the systems.
Journal, Report/Proceedings