Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Dry Matter Accumulation, Leaf Area Index and Yield Responses of Wheat Under Different Levels of Nitrogen

M Z Rahman
Department of Agronomy & Haor Agriculture, Sylhet Agricultural University, Sylhet-3100, Bangladesh

M R Islam
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

M T Islam
Department of Biotechnology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

M A Karim
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

Abstract/ Executive Summary:

An experiment was conducted with wheat at the Agronomic Research Site of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 during November, 2011 to March, 2012. A total six fertilizer treatments were maintained in the experiment in a Randomized Complete Block Design (RCBD) with four replications. A non-fertilized control was compared with five fertilized treatments receiving 20 kg ha^-1 of N at crop emergence plus supplementary nitrogen in five treatments which was applied in increasing rates of 30, 60, 90, 120 and 150 kg N ha^-1 distributed 25 and 50 days after sowing. Perusal of the data revealed significant effect from increased rate of N fertilization in total dry matter production, leaf area index, plant height and yield components of wheat. Significant increase was recorded in plant height, number of effective tillers m^-2, spikelets spike^-1, grains spike^-1, thousand grain weight and grain yield with increased dose of nitrogen. It was concluded that an application of 90 kg ha^-1 in two split along with 20 kg ha^-1 of N at crop emergence can meet up the N requirement of wheat crop and subsequently can ensure proper growth and development that leads to higher grain yield of wheat.

Keywords: Wheat, Emergence, Split, Grain and yield

Location: Agronomic Research Site of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706

Start Date: 00-11-2011

End Date: 00-03-2012

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

To study the response of wheat to nitrogenous fertilizer application

Methodology:

The experiment was carried out at the Field Research Site of the Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur-1706 during November, 2011 to March, 2012. It is located in Madhupur Tract under AEZ 28 at geographic coordinate 24⁰05' North latitude and 90⁰16' East longitude with an elevation of 8.4 m above the mean sea level. The crop tested in the experiment was wheat (Triticum aestivum L.) variety BARI Gom-26 which has been released by BARI in 2010. BARI Gom-26 was sown at a row-to-row spacing of 20 cm. A total five fertilizer treatments were maintained in the experimental plots of 3 m × 2 m in a Randomized Complete Block Design (RCBD) with four replications. A non-fertilized control (N₀) was compared with five fertilized treatments receiving 20 kg ha^-1 of N at crop emergence plus supplementary nitrogen which was applied as follows: i) CN₃₀=30, CN₆₀=60, CN₉₀=90, CN₁₂₀=120 and CN₁₅₀=150 kg N ha^-1 distributed 25 and 50 days after sowing (DAS). A basal dose of 60 kg P₂O₅, 40 kg K₂O and 20 kg S per hectare was added to every plot. The sources for N, P, K and S were conventional urea, triple super phosphate, muriate of potash and gypsum, respectively. Total amount of triple super phosphate, muriate of potash and gypsum fertilizers were applied plot wise during final land preparation before sowing. Plants were sampled periodically from a row length of 0.5 linear m per plot by harvesting at the base and these areas are converted to per square meter. The sampling was done at 50, 60, 70, 80 and 90 days after sowing. The above ground plant parts were segmented into different components as leaf, stem and spike with grain. Leaf area in each interval was measured by an automatic leaf area meter immediately after harvest. The segmented plant parts were then dried in an oven at 70⁰C for 72 hours and weighed. The experiment was terminated at plant maturity, when the plants were ripen and started to die. The harvest of wheat was started on 14 March and finished on 19 March, 2012. Significant treatment mean differences were determined using LSD test at 0.05 level of probability.

Source of Information: Bangladesh J. Agriculturist. 7(1): 27–32, (2014)

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Effects of rate of nitrogenous fertilizer were found to be significant on dry matter accumulation, LAI, yield and yield contributing attributes. It is clearly evident that dose of N fertilizer is decisive for formation of desirable number of spike bearing tiller to optimize wheat yield. Among the doses used in this experiment 90 kg N/ha along with 20 kg at emergence was found to be optimum for higher grain yield of wheat. Balanced N management practices need to be established and followed to improve N use efficiency leading to desirable grain yield and this will save our soil from being using over or under doses of fertilizer.

Knowledge Management: Journal