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Water Productivity of Wheat and Ground Water Level Fluctuation Pattern at BAU Farm

Dr. Mesbauddin Ahmed
Professor
Department of Irrigation and Water Management, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh,

Abstract/ Executive Summary:

The effect of variety on plant height and harvest index was significant at 1% level of probability in all cases. The irrigation treatments also affected plant height, panicle length, numbers of spikelet per panicle, straw yield and biological yield at 1% level of probability. The study also revealed that increasing water stress reduced the plant height, number of effective tillers per hill, grain yield, straw yield and biological yield. The combined effect of treatment I4 and BARI Gam-24 produced 4.75 t/ha which was the highest among all the interactions studied. Hence, considering all the outputs from the irrigated wheat experiments, it can be inferred that the fields having silt loam soil (as appeared at BAU Farm) should be irrigated thrice for BARI Gam-24 to get optimum yield and the concerned farmers may be suggested accordingly. It was also revealed that though the highest grain yield (4.59 t/ha) was found in treatment I4, its water productivity was the lowest (841 kg/ha/cm or 8.41 kg/m³) of all the irrigation treatments. On the contrary, treatment I3 gave a yield of 4.55 t/ha which was very close to the highest one having the highest water productivity of 1409 kg/ha/cm (14.09 kg/m³), indicating less use of water. The maximum (13.00 m) and minimum (4.84 m) depths of groundwater levels were observed during early April and late October, respectively, indicating that suction mode pumps will not work at BAU farm during dry period.

Keywords: Productivity, Ground water, Wheat

Location: Mymensingh

Start Date: 00-00-2011

End Date: 00-00-2012

Program Area: Crop-Soil-Water Management

Commodity: Irrigation scheduling

Objectives:

To investigate the possible effects of irrigation and variety on wheat production.

Methodology:

Two field experiments were conducted at the Bangladesh Agricultural University (BAU) farm during the project period (2011 and 2012) in order to investigate the possible effects of irrigation and variety on wheat production. Both the experiments were laid out in a split-plot design and were replicated thrice. During land preparation and as top dressing recommended doses of fertilizers were used. Herbicide and insecticide were applied as and when necessary. The varieties for the first experiment were BARI Gam-21 and BARI Gam-24 and the same for the second experiment were BARI Gam-25 and BARI Gam-26. The common irrigation treatments were: I₁ - control, I₂ - 17-21 days after sowing (DAS), I₃ - (17-21 + 45-50) DAS and I₄ - (17-21 + 45-50 + 75-80) DAS. Irrigation was applied on the basis of IW (Irrigation Water) and CPE (Cumulative Pan Evaporation) ratio.

Source of Information: BAU Research proceedings, Vol.23, 2013, PP. 67

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The study found that increasing water stress reduced the plant height, number of effective tillers per hill, grain yield, straw yield and biological yield. The combined effect of treatment I₄ and BARI Gam-24 produced 4.75 t/ha which was the highest among all the interactions studied. Hence, considering all the outputs from the irrigated wheat experiments, it can be inferred that the fields having silt loam soil (as appeared at BAU Farm) should be irrigated thrice for BARI Gam-24 to get optimum yield and the concerned farmers may be suggested accordingly. It was also revealed that though the highest grain yield (4.59 t/ha) was found in treatment I₄, its water productivity was the lowest (841 kg/ha/cm or 8.41 kg/m³) of all the irrigation treatments. On the contrary, treatment I₃ gave a yield of 4.55 t/ha which was very close to the highest one having the highest water productivity of 1409 kg/ha/cm (14.09 kg/m³), indicating less use of water. The maximum (13.00 m) and minimum (4.84 m) depths of groundwater levels were observed during early April and late October, respectively, indicating that suction mode pumps will not work at BAU farm during dry period.

Knowledge Management: Journal