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Zinc-iron Relationship in Wheat Plant Grown Under Drought Stress Condition (2015 – 2016)

S. Sultana
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

H. M. Naser
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

M. H. Rashid
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

S. Akther
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

R. A. Begum
Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

Abstract/ Executive Summary:

A field experiment was carried out to study the zinc-iron relationship in wheat (BARI gom-26) plants grown under water stress conditions at the net house of Soil Science Division, BARI, Joydebpur, Gazipur, from November 2015 to March 2016. The experiment was designed in a split-plot on sixteen treatments comprising four irrigation treatments (regular irrigation, stopping irrigation at crown root initiation, stopping irrigation at booting stage and stopping irrigation at grain filling stage) and four foliar application of zinc and iron (control, 0.05% of zinc, 0.05% of iron and 0.05% of zinc + 0.05% of iron). Zinc Sulphate Monohydrate (ZnSO₄.H₂O) and ferrous sulphate (FeSO₄.H₂O) was used as a source of Zn and Fe. The highest yield (4.01 t ha^-1) was recorded in stopping irrigation at the grain filling stage which was identical with regular irrigation. Water stress at the crown root initiation stage had the most negative effect on growth and yield. Foliar application of zinc and iron played a major role in the yield and yield components of wheat at later stages of growth. The results obtained from the present research showed that iron and zinc spray developed grain yield and quality of wheat and improved the effects caused by drought stress.

Keywords: Wheat, Performance, Drought stress, Fertilizers, Zinc. Iron

Location: Soil Science Division of the Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur

Start Date: 00-00-2015

End Date: 00-00-2016

Program Area: Crop-Soil-Water Management

Commodity: Wheat, Micronutrient

Objectives:

To evaluate the role of mixed application of micronutrients in improving wheat performance underwater stress conditions.

Methodology:

A field experiment was carried out in the net house of Soil Science Division of the Bangladesh Agricultural Research Institute (BARI), Joydebpur, Gazipur on 18 November 2015 with a view of study zinc-iron relationship in a wheat plant grown under water stress condition. The experiment was arranged as a split-plot base on a randomized complete block design with three replications. Main plots included irrigation period with three levels (irrigation at CRI stage, booting stage and grain filling stage) and sub-plots were treatments of Zn, Fe and Zn + Fe foliar application and control (water foliar application). BARI gom-26 variety was tested. Each split-plot was 2 m² in size with a 0.5 m² border distance. There were sixteen treatment combinations comprising four irrigation treatments, i.e T₁: full irrigation(unstressed); irrigation at the crown root initiation stage, booting stage and grain filling stage, T₂: stressed by stopping one irrigation at the crown root initiation stage, T₃: stressed by stopping one irrigation at booting stage, T₄: stressed by stopping one irrigation at grain filling stage and four levels of foliar sprays are F₁: control (foliar application of distilled water), F₂: foliar application of 0.05% of zn, F₃: foliar application 0.05% of Fe and F₄: foliar application of 0.05% of Zn and 0.05% of Fe. Foliar application of zinc and iron was done during the stopping irrigation at respective days. Zinc Sulphate Monohydrate (ZnSO₄.H₂O) and ferrous sulphate (FeSO₄.H₂O) was used as a source of zinc and iron. Urea, TSP, MP, Gypsum and Boric acid were used as a source of N, P, K, S and B, respectively. Fertilizers were applied based on BARC fertilizer recommendation guide-2012. All PKSB and half of N were applied at the final land preparation and the remaining half of N was applied before the booting stage. The crops were harvested on 04 March 2016 at full maturity. Ten plants from each plot were sampled randomly for the collection of different plant characters and yield attributes. Data on yield and yield contributing characters such as plant height (cm), spike length (cm), grain spike^-1,100 grain wt, yield (t ha^-1) were recorded. Plants of 1 m² area from each plot were selected for data collection. Data on yield and yield contributing parameters were recorded and statistically analyzed with the help of statistical package MSTAT-C and mean separation was tested by Duncan’s Multiple Range Test (DMRT). Moisture content was calculated by using the formula. % Moisture content in soil = Wet soil (g) – Dry soil (g)/ Dry soil (g) × 100. Initial soil samples collected from 0-15 cm depth prior to fertilizer application, were analyzed for all-important soil parameters using standard procedures. The soil was found to be acidic. Standard methods were used in these determinations. Soil pH was measured by a combined glass calomel electrode. Organic carbon was determined by the wet oxidation method (Walkley and Black). Total N was determined by a modified Kjeldahl method. Calcium (Ca), magnesium (Mg) and K were determined by NH4OAc extractable method, copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn) were determined by DTPA extraction followed by AAS reading. Boron (B) was determined by CaCl₂ extraction method. Available P was determined by the Bray and Kurtz method while S was determined using the turbidimetric method with BaCl₂.

Source of Information: Annual Research Report 2015 – 2016, Soil Science Division, BARI, Joydebpur, Gazipur Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

It can be concluded that the foliar application of zinc and iron fertilizers has a positive effect on growth, yield components, grain yield wheat. When plants are not able to absorb the iron from the soil due to soil pH, As a result, foliar application of iron develops plant growth, grain yield and its quality of wheat. Under drought stress, foliar application of zinc and iron improved yield of wheat, grain filling stage being more responsive.

Knowledge Management: Report/Proceedings