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Impact of Irrigation Schedules on Seed Yield, Water Use and Water Productivity of Some Mustard Mutants

M. H. Ali
Agricultural Engg. Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

A. A. Sarkar
Director (Admin. and Support Service)
Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

M. H. Zaman
Agricultural Engg. Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

M. A. Rahman
Agricultural Engg. Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

Abstract/ Executive Summary:

Field experiment was conducted at three locations to study the impact of different irrigation schedules on the crop growth, yield, evapo-transpiration and water productivity of some mustard mutants/variety. The effect of three irrigation regimes viz. irrigation at vegetative stage, irrigation at flowering stage, irrigation at vegetative plus flowering stage, along with a no irrigated plot (control) were tested. The results revealed that two irrigations applied at vegetative and flowering stages produced the highest seed yield and single irrigation at vegetative or flowering stage produced comparable seed yield (not statistically different from that of 2 irrigations in most cases). The irrigation water productivity was higher with one irrigation at vegetative stage for all locations. Considering the irrigation water use, yield and irrigation water productivity, it can be concluded that mustard should be irrigated twice at vegetative and flowering stages. Considering water economy, specially where groundwater withdrawal causes ecological imbalance, mustard should be irrigated at vegetative stage for optimum yield.

Keywords: Mustard, Irrigation, Evapo-transpiration, Water productivity

Location: BINA sub-stations i.e. Ishurdi

Start Date: 00-00-2007

End Date: 00-00-2008

Program Area: Crop-Soil-Water Management

Commodity: Irrigation scheduling

Objectives:

To study the impact of different irrigation schedules on seed yield, water use and water productivity of mustard mutants developed at the Bangladesh Institute of Nuclear Agriculture (BINA) with a view to determine the optimum irrigation schedule of the cultivars.

Methodology:

Field experiments were carried out during 2007-08 at three BINA sub-stations i.e. Ishurdi (24º08? N, 89º03? E), Magura (2.3º30? N, 89º35? E) and Rangpur (25^o45? N, 89^o15? E). The soils are calcareous silt-loam, loam, and sandy loam at Ishurdi, Magura, and Rangpur, respectively. The climate of the regions falls within humid sub-tropic with summer dominant rainfall. The mustard growing period (November–February) is characterized by dry winter. The experimental design was randomized complete block (RCB) with split-plot arrangements of the treatments. Irrigation treatments were allocated in the main plots (6 m × 5 m) and the mustard mutants were placed in the sub-plots (5 m × 2 m) with three replications. The experiments were conducted with same design and treatments in all locations. The irrigation treatments were: T₀ = Control (no irrigation), T₁ = Irrigation at vegetative stage (25–30 days after sowing), T₂ = Irrigation at flowering stage (45–50 DAS), T₃ = Irrigation at vegetative stage (25–30 DAS) and flowering stage (45–50 DAS). The mustard mutants/variety were: V₁ = MM014-02, V₂ = MM2-16-98, V₃ = Binasharisha-3 (Check variety), Soil moisture measurement, Irrigation water Productivity, Water productivity was calculated. The analysis of variance (ANOVA) was measured on the data for each parameter as applicable to the design. The significance of the treatment effect was determined using F-test, and to determine the significant difference among the means of the treatments, least significant difference (LSD) were estimated at 5% probability level.

Source of Information: Bangladesh J. Nuclear Agric. 27 & 28: 63-72, 2013

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the study, although the highest seed yield was observed with 2-irrigation regime at all locations, but it was statistically similar with single-irrigation regime (irrigation at vegetative or at flowering). The increase in yield in 2-irrigation regimes compared to single irrigation regime ranged from 13.3% to 17.0%, but the irrigation water productivity decreased. Considering the irrigation water use, yield and irrigation water productivity, it could be concluded that for the highest seed yield, mustard should be irrigated twice, namely at vegetative and flowering stages. In view of the limited water supply situations (considering water economy), specially where groundwater withdrawal causes ecological inbalance, mustard should be irrigated only at vegetative stage for optimum yield.

Knowledge Management: Journal