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Growth and Yield of Wheat as Influenced by Micronutrients Under Water Deficit Condition

M. A. Tithi
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh.

M. A. Mannan
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh.

M. A. R. Khan
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh.

M. M. Rahman
Department of Soil Science, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh.

Abstract/ Executive Summary:

Crop productivity is greatly affected by drought stress. In order to evaluate the effects of Zn and Fe micronutrients on the growth and yield of wheat (Triticum aestivum L.) variety BARI Gom 29, a pot experiment was conducted in the Agronomy research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University from November 2018 to March 2019. Two water regimes i.e. control (80% of field capacity) and drought (40% of field capacity) were maintained throughout the growing season. Micronutrients Zn and Fe viz. i) ZnSO₄.7H₂O and Fe₃SO₄.7H₂O @22 kg ha^-1were applied in the soil before sowing; ii) ZnSO₄.7H2O solution and Fe₃SO₄.7H₂O solution @ 5% of each was applied as a foliar spray at the flowering stage following completely randomized design (CRD) with three replications. The results indicated that drought stress affected negatively wheat growth such as plant height, fresh weight of leaf, stem, root, and the total weight of plant as well as yield. Zn and Fe mitigate the drought effects in wheat which ultimately improve the growth and the yield. Among the micronutrients, Fe (Fe₃SO₄.7H₂O) was found more effective when it was applied as foliar spray @ 5% solution for increasing the growth and yield of wheat under water deficit stress conditions.

Keywords: Zn, Fe, Application strategy, Drought tolerance.

Location: Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh

Start Date: 00-11-2018

End Date: 00-03-2019

Program Area: Crop-Soil-Water Management

Commodity: Drought, Wheat, Micronutrient, Water stress, Wheat

Objectives:

To investigate the effectiveness of zinc (Zn) and iron (Fe) micronutrients in reducing the adverse effects of drought stress in wheat in relation to growth and yield, and to identify the effective application method of zinc (Zn) and iron (Fe) for improving the drought tolerance potential of wheat.

Methodology:

A pot experiment was conducted under a semi-controlled environment (inside screen house) at the Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, Bangladesh from November 2018 to March 2019. The experimental site is in the center of Madhupur Tract (24.09^o N latitude and 90.26^o E longitude) at 8.4 m above sea level. Plastic pots (30 cm length and 24 cm diameter) were used in the experiment which was filled with soil, holds about 28% moisture at field capacity (FC). The soil of the pot was fertilized uniformly with 0.9, 0.8, and 0.8 g urea, triple superphosphate, and muriate of potash corresponding to 160-150-150 kg urea, triple superphosphate, and muriate of potash per hectare, respectively (BARC,2012). The experimental soil was sandy loam with pH 6.93, soil organic carbon 0.61%, total N 0.070%, available P 0.06 mg 100 g^-1, exchangeable K 0.79 cmolc kg^-1 dry soil, available S 10.00 mg g^-1, CEC 13.05 cmolc kg^-1 dry soil and EC 0.04 dSm^-1.

Source of Information: Bangladesh Agron. J. 2021, 24(1): 119-128

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Water deficit stress negatively affects the plant height, fresh weight of leaf, stem, and root as well as yield of wheat. Application of Fe and Zn micronutrients reduced the adverse effects of drought stress and improved these parameters of wheat under drought conditions. Among the micronutrients, Fe (Fe₃SO4.7H₂O) was found more effective when it was applied as foliar spray @ 5% solution for increasing the growth and yield of wheat in water deficit conditions.

Knowledge Management: Journal